./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8 --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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-2329fc7 [2022-12-13 12:51:59,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:51:59,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:51:59,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:51:59,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:51:59,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:51:59,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:51:59,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:51:59,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:51:59,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:51:59,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:51:59,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:51:59,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:51:59,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:51:59,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:51:59,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:51:59,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:51:59,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:51:59,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:51:59,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:51:59,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:51:59,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:51:59,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:51:59,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:51:59,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:51:59,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:51:59,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:51:59,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:51:59,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:51:59,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:51:59,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:51:59,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:51:59,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:51:59,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:51:59,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:51:59,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:51:59,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:51:59,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:51:59,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:51:59,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:51:59,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:51:59,047 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 12:51:59,062 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:51:59,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:51:59,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:51:59,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:51:59,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:51:59,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:51:59,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:51:59,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:51:59,064 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:51:59,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:51:59,065 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:51:59,065 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:51:59,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:51:59,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:51:59,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:51:59,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:51:59,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:51:59,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:51:59,066 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 12:51:59,066 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:51:59,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:51:59,066 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:51:59,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:51:59,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:51:59,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:51:59,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:51:59,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:51:59,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:51:59,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:51:59,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:51:59,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:51:59,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:51:59,068 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:51:59,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:51:59,068 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:51:59,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:51:59,069 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:51:59,069 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-12-13 12:51:59,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:51:59,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:51:59,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:51:59,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:51:59,280 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:51:59,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-12-13 12:52:01,792 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:52:01,939 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:52:01,939 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-12-13 12:52:01,944 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/data/3583e0ab5/b1d102f97fd84b6691a53c30e9b5672a/FLAG0543b9e1f [2022-12-13 12:52:02,360 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/data/3583e0ab5/b1d102f97fd84b6691a53c30e9b5672a [2022-12-13 12:52:02,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:52:02,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:52:02,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:52:02,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:52:02,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:52:02,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11cceef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02, skipping insertion in model container [2022-12-13 12:52:02,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:52:02,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:52:02,507 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:52:02,508 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:52:02,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:52:02,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:52:02,515 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_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-12-13 12:52:02,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:52:02,528 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:52:02,538 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:52:02,538 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:52:02,539 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:52:02,540 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:52:02,542 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_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-12-13 12:52:02,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:52:02,556 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:52:02,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02 WrapperNode [2022-12-13 12:52:02,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:52:02,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:52:02,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:52:02,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:52:02,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,584 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 172 [2022-12-13 12:52:02,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:52:02,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:52:02,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:52:02,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:52:02,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,601 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:52:02,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:52:02,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:52:02,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:52:02,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (1/1) ... [2022-12-13 12:52:02,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:52:02,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:02,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:52:02,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:52:02,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:52:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:52:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:52:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:52:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 12:52:02,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 12:52:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 12:52:02,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 12:52:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:52:02,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 12:52:02,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 12:52:02,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:52:02,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:52:02,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:52:02,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:52:02,657 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 12:52:02,731 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:52:02,733 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:52:02,980 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:52:03,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:52:03,144 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 12:52:03,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:52:03 BoogieIcfgContainer [2022-12-13 12:52:03,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:52:03,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:52:03,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:52:03,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:52:03,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:52:02" (1/3) ... [2022-12-13 12:52:03,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc750f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:52:03, skipping insertion in model container [2022-12-13 12:52:03,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:52:02" (2/3) ... [2022-12-13 12:52:03,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc750f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:52:03, skipping insertion in model container [2022-12-13 12:52:03,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:52:03" (3/3) ... [2022-12-13 12:52:03,153 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-12-13 12:52:03,159 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 12:52:03,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:52:03,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-12-13 12:52:03,166 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:52:03,261 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 12:52:03,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 140 transitions, 296 flow [2022-12-13 12:52:03,326 INFO L130 PetriNetUnfolder]: 9/138 cut-off events. [2022-12-13 12:52:03,326 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 12:52:03,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 9/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2022-12-13 12:52:03,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 140 transitions, 296 flow [2022-12-13 12:52:03,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 119 transitions, 247 flow [2022-12-13 12:52:03,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:52:03,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 119 transitions, 247 flow [2022-12-13 12:52:03,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 119 transitions, 247 flow [2022-12-13 12:52:03,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 119 transitions, 247 flow [2022-12-13 12:52:03,367 INFO L130 PetriNetUnfolder]: 8/119 cut-off events. [2022-12-13 12:52:03,367 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 12:52:03,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 119 events. 8/119 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 163 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2022-12-13 12:52:03,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 1400 [2022-12-13 12:52:11,780 INFO L134 LiptonReduction]: Checked pairs total: 1807 [2022-12-13 12:52:11,780 INFO L136 LiptonReduction]: Total number of compositions: 120 [2022-12-13 12:52:11,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:52:11,795 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;@62b4f4c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:52:11,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-12-13 12:52:11,796 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 12:52:11,797 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:52:11,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:11,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:52:11,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:11,801 INFO L85 PathProgramCache]: Analyzing trace with hash 24184, now seen corresponding path program 1 times [2022-12-13 12:52:11,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:11,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349575389] [2022-12-13 12:52:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:11,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:11,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:11,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349575389] [2022-12-13 12:52:11,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349575389] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:52:11,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:52:11,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:52:11,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504300017] [2022-12-13 12:52:11,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:52:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:52:11,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:12,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:52:12,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:52:12,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 260 [2022-12-13 12:52:12,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:12,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:12,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 260 [2022-12-13 12:52:12,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:12,299 INFO L130 PetriNetUnfolder]: 929/1331 cut-off events. [2022-12-13 12:52:12,299 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-13 12:52:12,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 1331 events. 929/1331 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 6590 event pairs, 444 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 1230. Up to 658 conditions per place. [2022-12-13 12:52:12,306 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 49 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2022-12-13 12:52:12,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 226 flow [2022-12-13 12:52:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:52:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:52:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2022-12-13 12:52:12,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5089743589743589 [2022-12-13 12:52:12,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2022-12-13 12:52:12,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2022-12-13 12:52:12,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:12,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2022-12-13 12:52:12,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:12,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:12,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:12,328 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 75 flow. Second operand 3 states and 397 transitions. [2022-12-13 12:52:12,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 226 flow [2022-12-13 12:52:12,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 216 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 12:52:12,333 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2022-12-13 12:52:12,334 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2022-12-13 12:52:12,337 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2022-12-13 12:52:12,337 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2022-12-13 12:52:12,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:12,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:12,338 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:52:12,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:52:12,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash 750390, now seen corresponding path program 1 times [2022-12-13 12:52:12,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:12,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835939383] [2022-12-13 12:52:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:12,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:12,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:12,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835939383] [2022-12-13 12:52:12,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835939383] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:12,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976032154] [2022-12-13 12:52:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:12,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:12,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:12,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:12,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:52:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:12,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:52:12,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:12,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:12,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976032154] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:12,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:12,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 12:52:12,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18939954] [2022-12-13 12:52:12,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:12,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:52:12,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:12,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:52:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:52:12,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 260 [2022-12-13 12:52:12,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 113.14285714285714) internal successors, (792), 7 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:12,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:12,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 260 [2022-12-13 12:52:12,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:13,153 INFO L130 PetriNetUnfolder]: 2324/3326 cut-off events. [2022-12-13 12:52:13,153 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 12:52:13,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6713 conditions, 3326 events. 2324/3326 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 18347 event pairs, 1110 based on Foata normal form. 0/941 useless extension candidates. Maximal degree in co-relation 5367. Up to 657 conditions per place. [2022-12-13 12:52:13,166 INFO L137 encePairwiseOnDemand]: 256/260 looper letters, 117 selfloop transitions, 9 changer transitions 0/128 dead transitions. [2022-12-13 12:52:13,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 128 transitions, 552 flow [2022-12-13 12:52:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:52:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:52:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 913 transitions. [2022-12-13 12:52:13,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5016483516483516 [2022-12-13 12:52:13,172 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 913 transitions. [2022-12-13 12:52:13,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 913 transitions. [2022-12-13 12:52:13,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:13,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 913 transitions. [2022-12-13 12:52:13,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.42857142857142) internal successors, (913), 7 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,181 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,181 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 7 states and 913 transitions. [2022-12-13 12:52:13,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 128 transitions, 552 flow [2022-12-13 12:52:13,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 128 transitions, 550 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:52:13,183 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 133 flow [2022-12-13 12:52:13,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=133, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2022-12-13 12:52:13,184 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2022-12-13 12:52:13,184 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 133 flow [2022-12-13 12:52:13,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.14285714285714) internal successors, (792), 7 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:13,184 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-12-13 12:52:13,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:52:13,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:13,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:13,386 INFO L85 PathProgramCache]: Analyzing trace with hash 23262774, now seen corresponding path program 1 times [2022-12-13 12:52:13,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:13,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775314094] [2022-12-13 12:52:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:52:13,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:13,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775314094] [2022-12-13 12:52:13,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775314094] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:52:13,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:52:13,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:52:13,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227438770] [2022-12-13 12:52:13,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:52:13,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:52:13,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:13,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:52:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:52:13,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 260 [2022-12-13 12:52:13,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:13,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 260 [2022-12-13 12:52:13,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:13,860 INFO L130 PetriNetUnfolder]: 2321/3322 cut-off events. [2022-12-13 12:52:13,860 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 12:52:13,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6715 conditions, 3322 events. 2321/3322 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 18915 event pairs, 1110 based on Foata normal form. 2/944 useless extension candidates. Maximal degree in co-relation 4019. Up to 3272 conditions per place. [2022-12-13 12:52:13,870 INFO L137 encePairwiseOnDemand]: 258/260 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2022-12-13 12:52:13,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 166 flow [2022-12-13 12:52:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:52:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:52:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-12-13 12:52:13,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4653846153846154 [2022-12-13 12:52:13,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-12-13 12:52:13,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-12-13 12:52:13,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:13,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-12-13 12:52:13,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,874 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 133 flow. Second operand 3 states and 363 transitions. [2022-12-13 12:52:13,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 166 flow [2022-12-13 12:52:13,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 32 transitions, 158 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 12:52:13,875 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 100 flow [2022-12-13 12:52:13,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2022-12-13 12:52:13,876 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2022-12-13 12:52:13,876 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 100 flow [2022-12-13 12:52:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:13,876 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:52:13,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 12:52:13,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash 720885265, now seen corresponding path program 1 times [2022-12-13 12:52:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:13,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545819694] [2022-12-13 12:52:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:13,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:13,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:13,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545819694] [2022-12-13 12:52:13,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545819694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:52:13,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:52:13,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:52:13,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430171373] [2022-12-13 12:52:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:52:13,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:52:13,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:52:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:52:13,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 260 [2022-12-13 12:52:13,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:13,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:13,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 260 [2022-12-13 12:52:13,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:14,363 INFO L130 PetriNetUnfolder]: 1474/2347 cut-off events. [2022-12-13 12:52:14,363 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 12:52:14,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4764 conditions, 2347 events. 1474/2347 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 14299 event pairs, 899 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 4752. Up to 2123 conditions per place. [2022-12-13 12:52:14,370 INFO L137 encePairwiseOnDemand]: 248/260 looper letters, 51 selfloop transitions, 4 changer transitions 2/58 dead transitions. [2022-12-13 12:52:14,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 272 flow [2022-12-13 12:52:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:52:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:52:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 593 transitions. [2022-12-13 12:52:14,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45615384615384613 [2022-12-13 12:52:14,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 593 transitions. [2022-12-13 12:52:14,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 593 transitions. [2022-12-13 12:52:14,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:14,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 593 transitions. [2022-12-13 12:52:14,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:14,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:14,375 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:14,375 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 100 flow. Second operand 5 states and 593 transitions. [2022-12-13 12:52:14,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 272 flow [2022-12-13 12:52:14,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:52:14,376 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 139 flow [2022-12-13 12:52:14,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2022-12-13 12:52:14,377 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2022-12-13 12:52:14,377 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 139 flow [2022-12-13 12:52:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:14,378 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:14,378 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:52:14,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 12:52:14,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash 880451731, now seen corresponding path program 1 times [2022-12-13 12:52:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:14,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333246618] [2022-12-13 12:52:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:14,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333246618] [2022-12-13 12:52:14,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333246618] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340222700] [2022-12-13 12:52:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:14,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:14,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:14,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:52:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 12:52:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:14,723 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 [2022-12-13 12:52:14,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:14,756 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 [2022-12-13 12:52:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:14,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:14,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:14,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-12-13 12:52:14,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:14,849 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 39 treesize of output 37 [2022-12-13 12:52:14,853 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 7 treesize of output 5 [2022-12-13 12:52:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:14,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340222700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:14,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:14,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 12:52:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141413864] [2022-12-13 12:52:14,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:14,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:52:14,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:52:14,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=99, Unknown=2, NotChecked=0, Total=132 [2022-12-13 12:52:15,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 260 [2022-12-13 12:52:15,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 139 flow. Second operand has 12 states, 12 states have (on average 102.25) internal successors, (1227), 12 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:15,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:15,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 260 [2022-12-13 12:52:15,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:15,755 INFO L130 PetriNetUnfolder]: 1971/3244 cut-off events. [2022-12-13 12:52:15,755 INFO L131 PetriNetUnfolder]: For 569/569 co-relation queries the response was YES. [2022-12-13 12:52:15,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7686 conditions, 3244 events. 1971/3244 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 22622 event pairs, 452 based on Foata normal form. 0/1450 useless extension candidates. Maximal degree in co-relation 7670. Up to 1769 conditions per place. [2022-12-13 12:52:15,766 INFO L137 encePairwiseOnDemand]: 248/260 looper letters, 54 selfloop transitions, 18 changer transitions 1/74 dead transitions. [2022-12-13 12:52:15,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 399 flow [2022-12-13 12:52:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:52:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:52:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 881 transitions. [2022-12-13 12:52:15,768 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4235576923076923 [2022-12-13 12:52:15,769 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 881 transitions. [2022-12-13 12:52:15,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 881 transitions. [2022-12-13 12:52:15,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:15,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 881 transitions. [2022-12-13 12:52:15,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 110.125) internal successors, (881), 8 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:15,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 260.0) internal successors, (2340), 9 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:15,773 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 260.0) internal successors, (2340), 9 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:15,773 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 139 flow. Second operand 8 states and 881 transitions. [2022-12-13 12:52:15,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 74 transitions, 399 flow [2022-12-13 12:52:15,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 74 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 12:52:15,775 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 241 flow [2022-12-13 12:52:15,775 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-12-13 12:52:15,776 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2022-12-13 12:52:15,776 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 241 flow [2022-12-13 12:52:15,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 102.25) internal successors, (1227), 12 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:15,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:15,776 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:52:15,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:52:15,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:15,977 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash 880451735, now seen corresponding path program 1 times [2022-12-13 12:52:15,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:15,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761826901] [2022-12-13 12:52:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:15,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:52:16,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:16,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761826901] [2022-12-13 12:52:16,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761826901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:52:16,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:52:16,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:52:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644879870] [2022-12-13 12:52:16,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:52:16,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:52:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:52:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:52:16,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 260 [2022-12-13 12:52:16,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:16,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:16,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 260 [2022-12-13 12:52:16,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:16,633 INFO L130 PetriNetUnfolder]: 2796/4288 cut-off events. [2022-12-13 12:52:16,633 INFO L131 PetriNetUnfolder]: For 1321/1347 co-relation queries the response was YES. [2022-12-13 12:52:16,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 4288 events. 2796/4288 cut-off events. For 1321/1347 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 26962 event pairs, 385 based on Foata normal form. 26/1997 useless extension candidates. Maximal degree in co-relation 11657. Up to 3757 conditions per place. [2022-12-13 12:52:16,647 INFO L137 encePairwiseOnDemand]: 249/260 looper letters, 50 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2022-12-13 12:52:16,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 62 transitions, 409 flow [2022-12-13 12:52:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:52:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:52:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2022-12-13 12:52:16,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4987179487179487 [2022-12-13 12:52:16,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2022-12-13 12:52:16,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2022-12-13 12:52:16,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:16,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2022-12-13 12:52:16,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:16,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:16,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:16,650 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 241 flow. Second operand 3 states and 389 transitions. [2022-12-13 12:52:16,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 62 transitions, 409 flow [2022-12-13 12:52:16,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 398 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 12:52:16,654 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 290 flow [2022-12-13 12:52:16,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2022-12-13 12:52:16,654 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2022-12-13 12:52:16,654 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 290 flow [2022-12-13 12:52:16,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:16,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:16,655 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:52:16,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 12:52:16,655 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:16,655 INFO L85 PathProgramCache]: Analyzing trace with hash 880451732, now seen corresponding path program 1 times [2022-12-13 12:52:16,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:16,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087783820] [2022-12-13 12:52:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:16,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:16,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087783820] [2022-12-13 12:52:16,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087783820] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615192710] [2022-12-13 12:52:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:16,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:16,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:16,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:16,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:52:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:16,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 12:52:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:16,918 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 [2022-12-13 12:52:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:16,944 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 [2022-12-13 12:52:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:16,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:17,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:17,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 12:52:17,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:17,018 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 33 treesize of output 31 [2022-12-13 12:52:17,022 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 [2022-12-13 12:52:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:17,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615192710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:17,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:17,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 12:52:17,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117679730] [2022-12-13 12:52:17,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:17,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:52:17,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:17,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:52:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=100, Unknown=1, NotChecked=0, Total=132 [2022-12-13 12:52:17,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 260 [2022-12-13 12:52:17,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 290 flow. Second operand has 12 states, 12 states have (on average 102.25) internal successors, (1227), 12 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:17,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:17,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 260 [2022-12-13 12:52:17,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:17,879 INFO L130 PetriNetUnfolder]: 2485/4056 cut-off events. [2022-12-13 12:52:17,879 INFO L131 PetriNetUnfolder]: For 3231/3231 co-relation queries the response was YES. [2022-12-13 12:52:17,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12629 conditions, 4056 events. 2485/4056 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 28486 event pairs, 776 based on Foata normal form. 4/2482 useless extension candidates. Maximal degree in co-relation 12609. Up to 2377 conditions per place. [2022-12-13 12:52:17,893 INFO L137 encePairwiseOnDemand]: 248/260 looper letters, 60 selfloop transitions, 22 changer transitions 1/84 dead transitions. [2022-12-13 12:52:17,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 582 flow [2022-12-13 12:52:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:52:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:52:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 876 transitions. [2022-12-13 12:52:17,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42115384615384616 [2022-12-13 12:52:17,895 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 876 transitions. [2022-12-13 12:52:17,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 876 transitions. [2022-12-13 12:52:17,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:17,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 876 transitions. [2022-12-13 12:52:17,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 109.5) internal successors, (876), 8 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:17,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 260.0) internal successors, (2340), 9 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:17,899 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 260.0) internal successors, (2340), 9 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:17,899 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 290 flow. Second operand 8 states and 876 transitions. [2022-12-13 12:52:17,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 582 flow [2022-12-13 12:52:17,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:52:17,903 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 337 flow [2022-12-13 12:52:17,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2022-12-13 12:52:17,904 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2022-12-13 12:52:17,904 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 337 flow [2022-12-13 12:52:17,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 102.25) internal successors, (1227), 12 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:17,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:17,905 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 12:52:17,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:52:18,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 12:52:18,106 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:18,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:18,106 INFO L85 PathProgramCache]: Analyzing trace with hash 880713208, now seen corresponding path program 2 times [2022-12-13 12:52:18,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:18,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534953332] [2022-12-13 12:52:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:18,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534953332] [2022-12-13 12:52:18,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534953332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388189384] [2022-12-13 12:52:18,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:52:18,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:18,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:18,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:18,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:52:18,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:52:18,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:52:18,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 12:52:18,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 12:52:18,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:52:18,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388189384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:52:18,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:52:18,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 12:52:18,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755305111] [2022-12-13 12:52:18,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:52:18,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:52:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:18,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:52:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:52:18,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 260 [2022-12-13 12:52:18,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:18,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:18,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 260 [2022-12-13 12:52:18,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:18,731 INFO L130 PetriNetUnfolder]: 2324/3875 cut-off events. [2022-12-13 12:52:18,731 INFO L131 PetriNetUnfolder]: For 3674/3700 co-relation queries the response was YES. [2022-12-13 12:52:18,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12243 conditions, 3875 events. 2324/3875 cut-off events. For 3674/3700 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 28128 event pairs, 1111 based on Foata normal form. 27/2365 useless extension candidates. Maximal degree in co-relation 12222. Up to 3816 conditions per place. [2022-12-13 12:52:18,748 INFO L137 encePairwiseOnDemand]: 258/260 looper letters, 47 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2022-12-13 12:52:18,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 423 flow [2022-12-13 12:52:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:52:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:52:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2022-12-13 12:52:18,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2022-12-13 12:52:18,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2022-12-13 12:52:18,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2022-12-13 12:52:18,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:18,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2022-12-13 12:52:18,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:18,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:18,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:18,753 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 337 flow. Second operand 3 states and 365 transitions. [2022-12-13 12:52:18,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 423 flow [2022-12-13 12:52:18,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 406 flow, removed 1 selfloop flow, removed 7 redundant places. [2022-12-13 12:52:18,761 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 312 flow [2022-12-13 12:52:18,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2022-12-13 12:52:18,762 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2022-12-13 12:52:18,762 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 312 flow [2022-12-13 12:52:18,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:18,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:18,762 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:18,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:52:18,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:18,963 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1285195336, now seen corresponding path program 1 times [2022-12-13 12:52:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:18,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179845317] [2022-12-13 12:52:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:18,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:19,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:19,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179845317] [2022-12-13 12:52:19,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179845317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:52:19,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:52:19,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:52:19,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974398185] [2022-12-13 12:52:19,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:52:19,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:52:19,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:52:19,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:52:19,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 260 [2022-12-13 12:52:19,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:19,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:19,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 260 [2022-12-13 12:52:19,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:19,444 INFO L130 PetriNetUnfolder]: 1792/3329 cut-off events. [2022-12-13 12:52:19,444 INFO L131 PetriNetUnfolder]: For 3538/3546 co-relation queries the response was YES. [2022-12-13 12:52:19,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10760 conditions, 3329 events. 1792/3329 cut-off events. For 3538/3546 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 23564 event pairs, 1195 based on Foata normal form. 14/2274 useless extension candidates. Maximal degree in co-relation 10742. Up to 3274 conditions per place. [2022-12-13 12:52:19,453 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 45 selfloop transitions, 2 changer transitions 15/64 dead transitions. [2022-12-13 12:52:19,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 463 flow [2022-12-13 12:52:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:52:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:52:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2022-12-13 12:52:19,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2022-12-13 12:52:19,455 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2022-12-13 12:52:19,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2022-12-13 12:52:19,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:19,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2022-12-13 12:52:19,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:19,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:19,458 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:19,458 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 312 flow. Second operand 5 states and 575 transitions. [2022-12-13 12:52:19,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 463 flow [2022-12-13 12:52:19,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:52:19,461 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 310 flow [2022-12-13 12:52:19,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2022-12-13 12:52:19,462 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 23 predicate places. [2022-12-13 12:52:19,462 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 310 flow [2022-12-13 12:52:19,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:19,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:19,462 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:19,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 12:52:19,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash 5665130, now seen corresponding path program 1 times [2022-12-13 12:52:19,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:19,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10214393] [2022-12-13 12:52:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:19,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:52:19,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:19,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10214393] [2022-12-13 12:52:19,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10214393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:19,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165078462] [2022-12-13 12:52:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:19,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:19,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:19,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:19,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:52:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:19,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:52:19,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:52:19,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:52:19,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165078462] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:19,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:19,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 12:52:19,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602272196] [2022-12-13 12:52:19,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:19,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:52:19,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:52:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:52:19,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 260 [2022-12-13 12:52:19,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 115.0) internal successors, (805), 7 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:19,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:19,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 260 [2022-12-13 12:52:19,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:21,070 INFO L130 PetriNetUnfolder]: 7381/11878 cut-off events. [2022-12-13 12:52:21,070 INFO L131 PetriNetUnfolder]: For 9048/9112 co-relation queries the response was YES. [2022-12-13 12:52:21,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39889 conditions, 11878 events. 7381/11878 cut-off events. For 9048/9112 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 95987 event pairs, 2184 based on Foata normal form. 52/8022 useless extension candidates. Maximal degree in co-relation 39868. Up to 5445 conditions per place. [2022-12-13 12:52:21,104 INFO L137 encePairwiseOnDemand]: 256/260 looper letters, 146 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2022-12-13 12:52:21,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 163 transitions, 1270 flow [2022-12-13 12:52:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:52:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:52:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 912 transitions. [2022-12-13 12:52:21,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5010989010989011 [2022-12-13 12:52:21,106 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 912 transitions. [2022-12-13 12:52:21,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 912 transitions. [2022-12-13 12:52:21,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:21,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 912 transitions. [2022-12-13 12:52:21,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.28571428571428) internal successors, (912), 7 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:21,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:21,109 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:21,109 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 310 flow. Second operand 7 states and 912 transitions. [2022-12-13 12:52:21,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 163 transitions, 1270 flow [2022-12-13 12:52:21,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 163 transitions, 1230 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-12-13 12:52:21,195 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 430 flow [2022-12-13 12:52:21,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2022-12-13 12:52:21,196 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2022-12-13 12:52:21,196 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 430 flow [2022-12-13 12:52:21,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.0) internal successors, (805), 7 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:21,196 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:21,196 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:21,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:52:21,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:21,398 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:21,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1524202688, now seen corresponding path program 1 times [2022-12-13 12:52:21,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:21,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975814202] [2022-12-13 12:52:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:21,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975814202] [2022-12-13 12:52:21,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975814202] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178694169] [2022-12-13 12:52:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:21,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:21,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:21,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:21,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:52:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:52:21,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:21,700 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 [2022-12-13 12:52:21,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:21,731 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 [2022-12-13 12:52:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:21,773 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 [2022-12-13 12:52:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:21,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:21,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:21,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-12-13 12:52:21,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:21,885 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 63 treesize of output 61 [2022-12-13 12:52:21,889 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 [2022-12-13 12:52:21,893 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 [2022-12-13 12:52:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:21,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178694169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:21,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:21,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 12:52:21,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846843103] [2022-12-13 12:52:21,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:21,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 12:52:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 12:52:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=183, Unknown=6, NotChecked=0, Total=240 [2022-12-13 12:52:22,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:52:22,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 430 flow. Second operand has 16 states, 16 states have (on average 87.25) internal successors, (1396), 16 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:22,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:22,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:52:22,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:23,674 INFO L130 PetriNetUnfolder]: 7221/11606 cut-off events. [2022-12-13 12:52:23,674 INFO L131 PetriNetUnfolder]: For 11376/11384 co-relation queries the response was YES. [2022-12-13 12:52:23,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39004 conditions, 11606 events. 7221/11606 cut-off events. For 11376/11384 co-relation queries the response was YES. Maximal size of possible extension queue 1403. Compared 93214 event pairs, 2336 based on Foata normal form. 100/7466 useless extension candidates. Maximal degree in co-relation 38983. Up to 5600 conditions per place. [2022-12-13 12:52:23,709 INFO L137 encePairwiseOnDemand]: 249/260 looper letters, 61 selfloop transitions, 24 changer transitions 0/86 dead transitions. [2022-12-13 12:52:23,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 723 flow [2022-12-13 12:52:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:52:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:52:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 659 transitions. [2022-12-13 12:52:23,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3620879120879121 [2022-12-13 12:52:23,711 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 659 transitions. [2022-12-13 12:52:23,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 659 transitions. [2022-12-13 12:52:23,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:23,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 659 transitions. [2022-12-13 12:52:23,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.14285714285714) internal successors, (659), 7 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:23,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:23,714 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:23,714 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 430 flow. Second operand 7 states and 659 transitions. [2022-12-13 12:52:23,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 723 flow [2022-12-13 12:52:23,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 723 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 12:52:23,732 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 541 flow [2022-12-13 12:52:23,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=541, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2022-12-13 12:52:23,732 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 32 predicate places. [2022-12-13 12:52:23,732 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 541 flow [2022-12-13 12:52:23,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.25) internal successors, (1396), 16 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:23,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:23,733 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:23,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:52:23,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:23,934 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1524333817, now seen corresponding path program 1 times [2022-12-13 12:52:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:23,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953239615] [2022-12-13 12:52:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:23,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:24,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:24,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953239615] [2022-12-13 12:52:24,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953239615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:24,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901021286] [2022-12-13 12:52:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:24,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:24,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:24,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:24,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:52:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:24,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:52:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:24,236 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 [2022-12-13 12:52:24,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:24,262 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 [2022-12-13 12:52:24,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:24,280 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 [2022-12-13 12:52:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:24,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:24,346 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_283 (Array Int Int)) (v_ArrVal_282 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_282) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_283) |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 [2022-12-13 12:52:24,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:24,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:52:24,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:24,363 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 73 treesize of output 71 [2022-12-13 12:52:24,367 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 56 treesize of output 52 [2022-12-13 12:52:24,372 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 26 treesize of output 24 [2022-12-13 12:52:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 12:52:24,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901021286] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:24,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:24,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-13 12:52:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975232010] [2022-12-13 12:52:24,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:52:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:52:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=142, Unknown=2, NotChecked=24, Total=210 [2022-12-13 12:52:24,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:52:24,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 541 flow. Second operand has 15 states, 15 states have (on average 87.26666666666667) internal successors, (1309), 15 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:24,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:24,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:52:24,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:26,045 INFO L130 PetriNetUnfolder]: 7057/11350 cut-off events. [2022-12-13 12:52:26,045 INFO L131 PetriNetUnfolder]: For 19961/19997 co-relation queries the response was YES. [2022-12-13 12:52:26,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41621 conditions, 11350 events. 7057/11350 cut-off events. For 19961/19997 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 91782 event pairs, 2412 based on Foata normal form. 100/7250 useless extension candidates. Maximal degree in co-relation 41596. Up to 5600 conditions per place. [2022-12-13 12:52:26,083 INFO L137 encePairwiseOnDemand]: 249/260 looper letters, 60 selfloop transitions, 24 changer transitions 0/85 dead transitions. [2022-12-13 12:52:26,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 794 flow [2022-12-13 12:52:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:52:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:52:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 658 transitions. [2022-12-13 12:52:26,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36153846153846153 [2022-12-13 12:52:26,085 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 658 transitions. [2022-12-13 12:52:26,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 658 transitions. [2022-12-13 12:52:26,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:26,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 658 transitions. [2022-12-13 12:52:26,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.0) internal successors, (658), 7 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:26,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:26,088 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:26,088 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 541 flow. Second operand 7 states and 658 transitions. [2022-12-13 12:52:26,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 794 flow [2022-12-13 12:52:26,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 85 transitions, 771 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-12-13 12:52:26,116 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 558 flow [2022-12-13 12:52:26,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2022-12-13 12:52:26,117 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 33 predicate places. [2022-12-13 12:52:26,117 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 558 flow [2022-12-13 12:52:26,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.26666666666667) internal successors, (1309), 15 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:26,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:26,117 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:26,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:52:26,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 12:52:26,319 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1524203307, now seen corresponding path program 1 times [2022-12-13 12:52:26,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:26,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954944214] [2022-12-13 12:52:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:26,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:26,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:26,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954944214] [2022-12-13 12:52:26,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954944214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:26,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84052930] [2022-12-13 12:52:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:26,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:26,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:26,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:26,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:52:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:26,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:52:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:26,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:26,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84052930] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:26,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:26,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 12:52:26,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751286149] [2022-12-13 12:52:26,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:26,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 12:52:26,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:26,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 12:52:26,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:52:26,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:52:26,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 558 flow. Second operand has 14 states, 14 states have (on average 104.28571428571429) internal successors, (1460), 14 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:26,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:26,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:52:26,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:27,998 INFO L130 PetriNetUnfolder]: 5542/8937 cut-off events. [2022-12-13 12:52:27,999 INFO L131 PetriNetUnfolder]: For 19314/19314 co-relation queries the response was YES. [2022-12-13 12:52:28,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33527 conditions, 8937 events. 5542/8937 cut-off events. For 19314/19314 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 69071 event pairs, 2318 based on Foata normal form. 115/5772 useless extension candidates. Maximal degree in co-relation 33503. Up to 6734 conditions per place. [2022-12-13 12:52:28,054 INFO L137 encePairwiseOnDemand]: 248/260 looper letters, 120 selfloop transitions, 11 changer transitions 3/135 dead transitions. [2022-12-13 12:52:28,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 1176 flow [2022-12-13 12:52:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:52:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 12:52:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1028 transitions. [2022-12-13 12:52:28,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4393162393162393 [2022-12-13 12:52:28,057 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1028 transitions. [2022-12-13 12:52:28,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1028 transitions. [2022-12-13 12:52:28,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:28,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1028 transitions. [2022-12-13 12:52:28,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.22222222222223) internal successors, (1028), 9 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:28,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 260.0) internal successors, (2600), 10 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:28,060 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 260.0) internal successors, (2600), 10 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:28,060 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 558 flow. Second operand 9 states and 1028 transitions. [2022-12-13 12:52:28,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 1176 flow [2022-12-13 12:52:28,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 135 transitions, 1148 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 12:52:28,075 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 706 flow [2022-12-13 12:52:28,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=706, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2022-12-13 12:52:28,076 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2022-12-13 12:52:28,076 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 706 flow [2022-12-13 12:52:28,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.28571428571429) internal successors, (1460), 14 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:28,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:28,076 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:28,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:52:28,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 12:52:28,278 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash 9746506, now seen corresponding path program 1 times [2022-12-13 12:52:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:28,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135528723] [2022-12-13 12:52:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:28,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:28,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:28,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135528723] [2022-12-13 12:52:28,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135528723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:28,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13385137] [2022-12-13 12:52:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:28,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:28,533 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:28,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:52:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:28,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:52:28,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:28,654 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 [2022-12-13 12:52:28,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:28,682 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 [2022-12-13 12:52:28,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:28,709 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 [2022-12-13 12:52:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:28,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:28,760 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_343 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_343) c_~A~0.base) c_~A~0.offset) 4294967296))) is different from false [2022-12-13 12:52:28,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:28,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:52:28,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:28,803 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 73 treesize of output 71 [2022-12-13 12:52:28,807 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 56 treesize of output 52 [2022-12-13 12:52:28,811 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 26 treesize of output 24 [2022-12-13 12:52:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:28,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13385137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:28,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:28,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 12:52:28,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358019545] [2022-12-13 12:52:28,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:28,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 12:52:28,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:28,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 12:52:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=166, Unknown=2, NotChecked=26, Total=240 [2022-12-13 12:52:28,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:52:28,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 706 flow. Second operand has 16 states, 16 states have (on average 87.4375) internal successors, (1399), 16 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:28,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:28,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:52:28,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:30,493 INFO L130 PetriNetUnfolder]: 5479/10270 cut-off events. [2022-12-13 12:52:30,493 INFO L131 PetriNetUnfolder]: For 49619/49937 co-relation queries the response was YES. [2022-12-13 12:52:30,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42849 conditions, 10270 events. 5479/10270 cut-off events. For 49619/49937 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 90807 event pairs, 1256 based on Foata normal form. 600/7848 useless extension candidates. Maximal degree in co-relation 42821. Up to 4294 conditions per place. [2022-12-13 12:52:30,527 INFO L137 encePairwiseOnDemand]: 249/260 looper letters, 98 selfloop transitions, 12 changer transitions 0/114 dead transitions. [2022-12-13 12:52:30,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 1452 flow [2022-12-13 12:52:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:52:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:52:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 659 transitions. [2022-12-13 12:52:30,529 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3620879120879121 [2022-12-13 12:52:30,529 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 659 transitions. [2022-12-13 12:52:30,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 659 transitions. [2022-12-13 12:52:30,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:30,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 659 transitions. [2022-12-13 12:52:30,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.14285714285714) internal successors, (659), 7 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:30,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:30,532 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:30,532 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 706 flow. Second operand 7 states and 659 transitions. [2022-12-13 12:52:30,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 1452 flow [2022-12-13 12:52:30,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 1440 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 12:52:30,556 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 739 flow [2022-12-13 12:52:30,556 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=739, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2022-12-13 12:52:30,557 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 46 predicate places. [2022-12-13 12:52:30,557 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 739 flow [2022-12-13 12:52:30,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.4375) internal successors, (1399), 16 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:30,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:30,557 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-12-13 12:52:30,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:52:30,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 12:52:30,758 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:30,759 INFO L85 PathProgramCache]: Analyzing trace with hash -878542330, now seen corresponding path program 1 times [2022-12-13 12:52:30,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735459737] [2022-12-13 12:52:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:30,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 12:52:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:30,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735459737] [2022-12-13 12:52:30,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735459737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:52:30,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:52:30,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:52:30,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24845402] [2022-12-13 12:52:30,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:52:30,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:52:30,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:52:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:52:30,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 260 [2022-12-13 12:52:30,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 739 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:30,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:30,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 260 [2022-12-13 12:52:30,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:32,184 INFO L130 PetriNetUnfolder]: 4812/9235 cut-off events. [2022-12-13 12:52:32,184 INFO L131 PetriNetUnfolder]: For 36394/37588 co-relation queries the response was YES. [2022-12-13 12:52:32,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42023 conditions, 9235 events. 4812/9235 cut-off events. For 36394/37588 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 84375 event pairs, 2500 based on Foata normal form. 1527/9420 useless extension candidates. Maximal degree in co-relation 41993. Up to 9027 conditions per place. [2022-12-13 12:52:32,219 INFO L137 encePairwiseOnDemand]: 258/260 looper letters, 69 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2022-12-13 12:52:32,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 74 transitions, 823 flow [2022-12-13 12:52:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:52:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:52:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2022-12-13 12:52:32,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48205128205128206 [2022-12-13 12:52:32,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2022-12-13 12:52:32,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2022-12-13 12:52:32,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:32,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2022-12-13 12:52:32,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:32,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:32,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:32,223 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 739 flow. Second operand 3 states and 376 transitions. [2022-12-13 12:52:32,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 74 transitions, 823 flow [2022-12-13 12:52:32,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 74 transitions, 817 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 12:52:32,252 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 599 flow [2022-12-13 12:52:32,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=599, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2022-12-13 12:52:32,253 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 43 predicate places. [2022-12-13 12:52:32,253 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 599 flow [2022-12-13 12:52:32,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:32,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:32,253 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:32,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 12:52:32,253 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:32,253 INFO L85 PathProgramCache]: Analyzing trace with hash 248754478, now seen corresponding path program 1 times [2022-12-13 12:52:32,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:32,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297014285] [2022-12-13 12:52:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:32,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:32,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297014285] [2022-12-13 12:52:32,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297014285] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:32,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696333106] [2022-12-13 12:52:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:32,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:32,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:32,504 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:32,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:52:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:32,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 12:52:32,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:32,619 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 13 treesize of output 9 [2022-12-13 12:52:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:32,644 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 [2022-12-13 12:52:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:32,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:32,702 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_391 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_391) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:52:32,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:32,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-12-13 12:52:32,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:32,715 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 37 treesize of output 33 [2022-12-13 12:52:32,723 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 7 treesize of output 3 [2022-12-13 12:52:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-13 12:52:32,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696333106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:32,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:32,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-13 12:52:32,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077088429] [2022-12-13 12:52:32,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:32,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 12:52:32,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 12:52:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=226, Unknown=1, NotChecked=30, Total=306 [2022-12-13 12:52:32,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 12:52:32,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 599 flow. Second operand has 18 states, 18 states have (on average 90.22222222222223) internal successors, (1624), 18 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:32,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:32,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 12:52:32,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:34,302 INFO L130 PetriNetUnfolder]: 4770/9122 cut-off events. [2022-12-13 12:52:34,302 INFO L131 PetriNetUnfolder]: For 39198/40319 co-relation queries the response was YES. [2022-12-13 12:52:34,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41695 conditions, 9122 events. 4770/9122 cut-off events. For 39198/40319 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 84074 event pairs, 2223 based on Foata normal form. 1124/8920 useless extension candidates. Maximal degree in co-relation 41666. Up to 5683 conditions per place. [2022-12-13 12:52:34,354 INFO L137 encePairwiseOnDemand]: 249/260 looper letters, 89 selfloop transitions, 28 changer transitions 0/118 dead transitions. [2022-12-13 12:52:34,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 1209 flow [2022-12-13 12:52:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:52:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:52:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1152 transitions. [2022-12-13 12:52:34,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2022-12-13 12:52:34,359 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1152 transitions. [2022-12-13 12:52:34,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1152 transitions. [2022-12-13 12:52:34,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:34,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1152 transitions. [2022-12-13 12:52:34,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.0) internal successors, (1152), 12 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:34,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:34,369 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:34,369 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 599 flow. Second operand 12 states and 1152 transitions. [2022-12-13 12:52:34,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 1209 flow [2022-12-13 12:52:34,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 1205 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:52:34,404 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 804 flow [2022-12-13 12:52:34,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=804, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-12-13 12:52:34,405 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 56 predicate places. [2022-12-13 12:52:34,405 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 804 flow [2022-12-13 12:52:34,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.22222222222223) internal successors, (1624), 18 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:34,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:34,406 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:34,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 12:52:34,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 12:52:34,607 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:34,608 INFO L85 PathProgramCache]: Analyzing trace with hash 248754481, now seen corresponding path program 1 times [2022-12-13 12:52:34,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:34,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057770291] [2022-12-13 12:52:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:34,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:52:34,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:34,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057770291] [2022-12-13 12:52:34,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057770291] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:52:34,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:52:34,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:52:34,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268458171] [2022-12-13 12:52:34,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:52:34,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:52:34,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:34,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:52:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:52:34,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 260 [2022-12-13 12:52:34,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 804 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:34,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:34,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 260 [2022-12-13 12:52:34,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:35,654 INFO L130 PetriNetUnfolder]: 3391/6513 cut-off events. [2022-12-13 12:52:35,654 INFO L131 PetriNetUnfolder]: For 29898/30839 co-relation queries the response was YES. [2022-12-13 12:52:35,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29667 conditions, 6513 events. 3391/6513 cut-off events. For 29898/30839 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 56034 event pairs, 2889 based on Foata normal form. 941/7182 useless extension candidates. Maximal degree in co-relation 29634. Up to 6441 conditions per place. [2022-12-13 12:52:35,680 INFO L137 encePairwiseOnDemand]: 257/260 looper letters, 59 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2022-12-13 12:52:35,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 65 transitions, 819 flow [2022-12-13 12:52:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:52:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:52:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2022-12-13 12:52:35,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2022-12-13 12:52:35,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2022-12-13 12:52:35,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2022-12-13 12:52:35,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:35,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2022-12-13 12:52:35,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:35,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:35,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:35,683 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 804 flow. Second operand 3 states and 366 transitions. [2022-12-13 12:52:35,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 65 transitions, 819 flow [2022-12-13 12:52:35,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 65 transitions, 801 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 12:52:35,703 INFO L231 Difference]: Finished difference. Result has 90 places, 65 transitions, 683 flow [2022-12-13 12:52:35,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=683, PETRI_PLACES=90, PETRI_TRANSITIONS=65} [2022-12-13 12:52:35,704 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 53 predicate places. [2022-12-13 12:52:35,704 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 65 transitions, 683 flow [2022-12-13 12:52:35,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:35,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:35,704 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:35,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 12:52:35,704 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash 9746505, now seen corresponding path program 1 times [2022-12-13 12:52:35,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:35,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557747496] [2022-12-13 12:52:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:35,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:35,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:35,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557747496] [2022-12-13 12:52:35,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557747496] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:35,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355239151] [2022-12-13 12:52:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:35,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:35,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:35,836 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:35,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:52:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:35,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:52:35,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:35,947 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 [2022-12-13 12:52:35,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:35,976 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 [2022-12-13 12:52:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:35,999 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 [2022-12-13 12:52:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:36,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:36,042 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_440 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_440) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-12-13 12:52:36,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:36,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-12-13 12:52:36,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:36,081 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 125 treesize of output 119 [2022-12-13 12:52:36,086 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 106 treesize of output 98 [2022-12-13 12:52:36,091 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 51 treesize of output 47 [2022-12-13 12:52:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:36,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355239151] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:36,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:36,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-13 12:52:36,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638755079] [2022-12-13 12:52:36,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:36,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:52:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:52:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=143, Unknown=1, NotChecked=24, Total=210 [2022-12-13 12:52:36,186 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:52:36,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 65 transitions, 683 flow. Second operand has 15 states, 15 states have (on average 87.4) internal successors, (1311), 15 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:36,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:36,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:52:36,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:37,140 INFO L130 PetriNetUnfolder]: 3391/6455 cut-off events. [2022-12-13 12:52:37,140 INFO L131 PetriNetUnfolder]: For 31719/31719 co-relation queries the response was YES. [2022-12-13 12:52:37,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29735 conditions, 6455 events. 3391/6455 cut-off events. For 31719/31719 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 52700 event pairs, 988 based on Foata normal form. 260/6447 useless extension candidates. Maximal degree in co-relation 29702. Up to 2600 conditions per place. [2022-12-13 12:52:37,165 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 84 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2022-12-13 12:52:37,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 99 transitions, 1237 flow [2022-12-13 12:52:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:52:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:52:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 648 transitions. [2022-12-13 12:52:37,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35604395604395606 [2022-12-13 12:52:37,167 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 648 transitions. [2022-12-13 12:52:37,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 648 transitions. [2022-12-13 12:52:37,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:37,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 648 transitions. [2022-12-13 12:52:37,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.57142857142857) internal successors, (648), 7 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:37,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:37,169 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 260.0) internal successors, (2080), 8 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:37,169 INFO L175 Difference]: Start difference. First operand has 90 places, 65 transitions, 683 flow. Second operand 7 states and 648 transitions. [2022-12-13 12:52:37,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 99 transitions, 1237 flow [2022-12-13 12:52:37,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 1236 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:52:37,196 INFO L231 Difference]: Finished difference. Result has 95 places, 64 transitions, 700 flow [2022-12-13 12:52:37,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=700, PETRI_PLACES=95, PETRI_TRANSITIONS=64} [2022-12-13 12:52:37,197 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 58 predicate places. [2022-12-13 12:52:37,197 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 64 transitions, 700 flow [2022-12-13 12:52:37,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.4) internal successors, (1311), 15 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:37,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:37,197 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:37,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 12:52:37,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 12:52:37,398 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash 248754480, now seen corresponding path program 1 times [2022-12-13 12:52:37,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:37,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186096422] [2022-12-13 12:52:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:37,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:52:37,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:37,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186096422] [2022-12-13 12:52:37,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186096422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:52:37,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:52:37,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:52:37,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19533923] [2022-12-13 12:52:37,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:52:37,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:52:37,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:52:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:52:37,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 260 [2022-12-13 12:52:37,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 64 transitions, 700 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:37,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:37,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 260 [2022-12-13 12:52:37,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:37,991 INFO L130 PetriNetUnfolder]: 2065/3953 cut-off events. [2022-12-13 12:52:37,992 INFO L131 PetriNetUnfolder]: For 25824/26392 co-relation queries the response was YES. [2022-12-13 12:52:37,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18273 conditions, 3953 events. 2065/3953 cut-off events. For 25824/26392 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30079 event pairs, 1671 based on Foata normal form. 975/4834 useless extension candidates. Maximal degree in co-relation 18239. Up to 3893 conditions per place. [2022-12-13 12:52:38,008 INFO L137 encePairwiseOnDemand]: 257/260 looper letters, 50 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2022-12-13 12:52:38,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 56 transitions, 694 flow [2022-12-13 12:52:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:52:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:52:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2022-12-13 12:52:38,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-12-13 12:52:38,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2022-12-13 12:52:38,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2022-12-13 12:52:38,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:38,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2022-12-13 12:52:38,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:38,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:38,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:38,012 INFO L175 Difference]: Start difference. First operand has 95 places, 64 transitions, 700 flow. Second operand 3 states and 364 transitions. [2022-12-13 12:52:38,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 56 transitions, 694 flow [2022-12-13 12:52:38,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 56 transitions, 640 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-12-13 12:52:38,036 INFO L231 Difference]: Finished difference. Result has 87 places, 56 transitions, 540 flow [2022-12-13 12:52:38,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=540, PETRI_PLACES=87, PETRI_TRANSITIONS=56} [2022-12-13 12:52:38,037 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 50 predicate places. [2022-12-13 12:52:38,037 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 56 transitions, 540 flow [2022-12-13 12:52:38,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:38,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:38,037 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:38,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 12:52:38,037 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:38,038 INFO L85 PathProgramCache]: Analyzing trace with hash 248754477, now seen corresponding path program 2 times [2022-12-13 12:52:38,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:38,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075288065] [2022-12-13 12:52:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:38,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:38,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:38,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075288065] [2022-12-13 12:52:38,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075288065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:38,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748198654] [2022-12-13 12:52:38,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:52:38,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:38,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:38,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:38,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:52:38,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:52:38,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:52:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:52:38,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:38,394 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 13 treesize of output 9 [2022-12-13 12:52:38,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:38,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:52:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:38,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:38,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:38,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 12:52:38,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:38,616 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 47 treesize of output 43 [2022-12-13 12:52:38,621 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 15 treesize of output 9 [2022-12-13 12:52:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:38,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748198654] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:38,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:38,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 12:52:38,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764530303] [2022-12-13 12:52:38,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:38,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 12:52:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 12:52:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:52:39,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 260 [2022-12-13 12:52:39,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 56 transitions, 540 flow. Second operand has 20 states, 20 states have (on average 95.2) internal successors, (1904), 20 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:39,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:39,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 260 [2022-12-13 12:52:39,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:41,997 INFO L130 PetriNetUnfolder]: 3020/5551 cut-off events. [2022-12-13 12:52:41,998 INFO L131 PetriNetUnfolder]: For 26779/27887 co-relation queries the response was YES. [2022-12-13 12:52:42,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24049 conditions, 5551 events. 3020/5551 cut-off events. For 26779/27887 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 43103 event pairs, 1229 based on Foata normal form. 1169/6710 useless extension candidates. Maximal degree in co-relation 24018. Up to 1909 conditions per place. [2022-12-13 12:52:42,017 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 122 selfloop transitions, 69 changer transitions 4/196 dead transitions. [2022-12-13 12:52:42,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 196 transitions, 1971 flow [2022-12-13 12:52:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 12:52:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 12:52:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3362 transitions. [2022-12-13 12:52:42,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38031674208144794 [2022-12-13 12:52:42,020 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3362 transitions. [2022-12-13 12:52:42,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3362 transitions. [2022-12-13 12:52:42,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:42,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3362 transitions. [2022-12-13 12:52:42,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 98.88235294117646) internal successors, (3362), 34 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:42,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 260.0) internal successors, (9100), 35 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:42,029 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 260.0) internal successors, (9100), 35 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:42,029 INFO L175 Difference]: Start difference. First operand has 87 places, 56 transitions, 540 flow. Second operand 34 states and 3362 transitions. [2022-12-13 12:52:42,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 196 transitions, 1971 flow [2022-12-13 12:52:42,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 196 transitions, 1925 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-13 12:52:42,047 INFO L231 Difference]: Finished difference. Result has 123 places, 104 transitions, 1166 flow [2022-12-13 12:52:42,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1166, PETRI_PLACES=123, PETRI_TRANSITIONS=104} [2022-12-13 12:52:42,048 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 86 predicate places. [2022-12-13 12:52:42,048 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 104 transitions, 1166 flow [2022-12-13 12:52:42,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.2) internal successors, (1904), 20 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:42,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:42,048 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:42,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:52:42,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:42,249 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash -878543002, now seen corresponding path program 1 times [2022-12-13 12:52:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:42,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238549966] [2022-12-13 12:52:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:42,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:42,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238549966] [2022-12-13 12:52:42,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238549966] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363169190] [2022-12-13 12:52:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:42,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:42,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:42,467 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:42,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:52:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:42,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 12:52:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:42,585 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 13 treesize of output 9 [2022-12-13 12:52:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:42,612 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 [2022-12-13 12:52:42,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:42,669 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 [2022-12-13 12:52:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:42,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:42,741 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_526 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_526) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296)) is different from false [2022-12-13 12:52:42,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:42,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:52:42,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:42,782 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 141 treesize of output 131 [2022-12-13 12:52:42,787 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 59 treesize of output 51 [2022-12-13 12:52:42,791 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 110 treesize of output 94 [2022-12-13 12:52:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:42,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363169190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:42,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:42,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 12:52:42,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120411365] [2022-12-13 12:52:42,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:42,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 12:52:42,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 12:52:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=387, Unknown=7, NotChecked=40, Total=506 [2022-12-13 12:52:42,916 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:52:42,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 104 transitions, 1166 flow. Second operand has 23 states, 23 states have (on average 87.17391304347827) internal successors, (2005), 23 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:42,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:42,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:52:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:44,435 INFO L130 PetriNetUnfolder]: 2920/5391 cut-off events. [2022-12-13 12:52:44,435 INFO L131 PetriNetUnfolder]: For 35297/36329 co-relation queries the response was YES. [2022-12-13 12:52:44,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24965 conditions, 5391 events. 2920/5391 cut-off events. For 35297/36329 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 41795 event pairs, 1650 based on Foata normal form. 1096/6476 useless extension candidates. Maximal degree in co-relation 24928. Up to 2900 conditions per place. [2022-12-13 12:52:44,467 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 131 selfloop transitions, 27 changer transitions 1/160 dead transitions. [2022-12-13 12:52:44,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 160 transitions, 1819 flow [2022-12-13 12:52:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:52:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:52:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 944 transitions. [2022-12-13 12:52:44,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3630769230769231 [2022-12-13 12:52:44,470 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 944 transitions. [2022-12-13 12:52:44,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 944 transitions. [2022-12-13 12:52:44,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:44,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 944 transitions. [2022-12-13 12:52:44,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.4) internal successors, (944), 10 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:44,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:44,475 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:44,475 INFO L175 Difference]: Start difference. First operand has 123 places, 104 transitions, 1166 flow. Second operand 10 states and 944 transitions. [2022-12-13 12:52:44,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 160 transitions, 1819 flow [2022-12-13 12:52:44,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1748 flow, removed 17 selfloop flow, removed 8 redundant places. [2022-12-13 12:52:44,510 INFO L231 Difference]: Finished difference. Result has 126 places, 105 transitions, 1199 flow [2022-12-13 12:52:44,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1199, PETRI_PLACES=126, PETRI_TRANSITIONS=105} [2022-12-13 12:52:44,510 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 89 predicate places. [2022-12-13 12:52:44,510 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 105 transitions, 1199 flow [2022-12-13 12:52:44,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 87.17391304347827) internal successors, (2005), 23 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:44,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:44,511 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-12-13 12:52:44,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 12:52:44,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:44,712 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash -878542382, now seen corresponding path program 2 times [2022-12-13 12:52:44,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:44,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778862422] [2022-12-13 12:52:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:44,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:44,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778862422] [2022-12-13 12:52:44,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778862422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:44,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537099092] [2022-12-13 12:52:44,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:52:44,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:44,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:44,820 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:44,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 12:52:44,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:52:44,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:52:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 12:52:44,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:44,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:45,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537099092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:45,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:45,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 12:52:45,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836406449] [2022-12-13 12:52:45,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:45,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:52:45,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:52:45,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:52:45,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:52:45,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 105 transitions, 1199 flow. Second operand has 19 states, 19 states have (on average 104.21052631578948) internal successors, (1980), 19 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:45,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:45,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:52:45,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:46,077 INFO L130 PetriNetUnfolder]: 2020/3906 cut-off events. [2022-12-13 12:52:46,077 INFO L131 PetriNetUnfolder]: For 27739/28529 co-relation queries the response was YES. [2022-12-13 12:52:46,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17607 conditions, 3906 events. 2020/3906 cut-off events. For 27739/28529 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29785 event pairs, 997 based on Foata normal form. 954/4858 useless extension candidates. Maximal degree in co-relation 17568. Up to 1505 conditions per place. [2022-12-13 12:52:46,101 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 172 selfloop transitions, 35 changer transitions 9/217 dead transitions. [2022-12-13 12:52:46,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 217 transitions, 2155 flow [2022-12-13 12:52:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 12:52:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 12:52:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1906 transitions. [2022-12-13 12:52:46,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4312217194570136 [2022-12-13 12:52:46,104 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1906 transitions. [2022-12-13 12:52:46,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1906 transitions. [2022-12-13 12:52:46,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:46,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1906 transitions. [2022-12-13 12:52:46,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 112.11764705882354) internal successors, (1906), 17 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:46,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 260.0) internal successors, (4680), 18 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:46,108 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 260.0) internal successors, (4680), 18 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:46,108 INFO L175 Difference]: Start difference. First operand has 126 places, 105 transitions, 1199 flow. Second operand 17 states and 1906 transitions. [2022-12-13 12:52:46,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 217 transitions, 2155 flow [2022-12-13 12:52:46,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 217 transitions, 2048 flow, removed 4 selfloop flow, removed 9 redundant places. [2022-12-13 12:52:46,135 INFO L231 Difference]: Finished difference. Result has 139 places, 104 transitions, 1171 flow [2022-12-13 12:52:46,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1171, PETRI_PLACES=139, PETRI_TRANSITIONS=104} [2022-12-13 12:52:46,135 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 102 predicate places. [2022-12-13 12:52:46,135 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 104 transitions, 1171 flow [2022-12-13 12:52:46,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 104.21052631578948) internal successors, (1980), 19 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:46,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:46,136 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:46,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 12:52:46,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 12:52:46,336 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:46,337 INFO L85 PathProgramCache]: Analyzing trace with hash 302145649, now seen corresponding path program 1 times [2022-12-13 12:52:46,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:46,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241866880] [2022-12-13 12:52:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:46,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:46,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:46,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241866880] [2022-12-13 12:52:46,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241866880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:46,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143702226] [2022-12-13 12:52:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:46,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:46,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:46,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:46,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 12:52:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:46,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:52:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:46,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:46,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143702226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:46,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:46,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 12:52:46,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902420046] [2022-12-13 12:52:46,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:46,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 12:52:46,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:46,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 12:52:46,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:52:46,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:52:46,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 104 transitions, 1171 flow. Second operand has 14 states, 14 states have (on average 104.42857142857143) internal successors, (1462), 14 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:46,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:46,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:52:46,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:47,510 INFO L130 PetriNetUnfolder]: 2106/4083 cut-off events. [2022-12-13 12:52:47,510 INFO L131 PetriNetUnfolder]: For 32015/32090 co-relation queries the response was YES. [2022-12-13 12:52:47,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19604 conditions, 4083 events. 2106/4083 cut-off events. For 32015/32090 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30098 event pairs, 1229 based on Foata normal form. 151/4230 useless extension candidates. Maximal degree in co-relation 19561. Up to 3037 conditions per place. [2022-12-13 12:52:47,528 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 94 selfloop transitions, 4 changer transitions 52/155 dead transitions. [2022-12-13 12:52:47,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 155 transitions, 1937 flow [2022-12-13 12:52:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:52:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 12:52:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 990 transitions. [2022-12-13 12:52:47,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2022-12-13 12:52:47,530 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 990 transitions. [2022-12-13 12:52:47,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 990 transitions. [2022-12-13 12:52:47,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:47,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 990 transitions. [2022-12-13 12:52:47,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:47,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 260.0) internal successors, (2600), 10 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:47,533 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 260.0) internal successors, (2600), 10 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:47,533 INFO L175 Difference]: Start difference. First operand has 139 places, 104 transitions, 1171 flow. Second operand 9 states and 990 transitions. [2022-12-13 12:52:47,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 155 transitions, 1937 flow [2022-12-13 12:52:47,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 155 transitions, 1877 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-12-13 12:52:47,575 INFO L231 Difference]: Finished difference. Result has 144 places, 90 transitions, 1017 flow [2022-12-13 12:52:47,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1017, PETRI_PLACES=144, PETRI_TRANSITIONS=90} [2022-12-13 12:52:47,576 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 107 predicate places. [2022-12-13 12:52:47,576 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 90 transitions, 1017 flow [2022-12-13 12:52:47,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.42857142857143) internal successors, (1462), 14 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:47,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:47,576 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:47,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 12:52:47,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 12:52:47,777 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:47,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash -878543003, now seen corresponding path program 1 times [2022-12-13 12:52:47,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:47,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144918157] [2022-12-13 12:52:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:47,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:47,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144918157] [2022-12-13 12:52:47,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144918157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572646501] [2022-12-13 12:52:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:47,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:47,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:47,994 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:47,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 12:52:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:48,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 12:52:48,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:48,132 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 13 treesize of output 9 [2022-12-13 12:52:48,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:48,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:52:48,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:48,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:52:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:48,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:48,269 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_624 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_624) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2022-12-13 12:52:48,273 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_624 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_624) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-12-13 12:52:48,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:48,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:52:48,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:48,339 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 81 treesize of output 77 [2022-12-13 12:52:48,342 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 32 treesize of output 28 [2022-12-13 12:52:48,345 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 58 treesize of output 50 [2022-12-13 12:52:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 12:52:48,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572646501] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:48,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:48,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 12:52:48,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352408628] [2022-12-13 12:52:48,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:48,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 12:52:48,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:48,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 12:52:48,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=351, Unknown=4, NotChecked=78, Total=506 [2022-12-13 12:52:48,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:52:48,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 90 transitions, 1017 flow. Second operand has 23 states, 23 states have (on average 87.17391304347827) internal successors, (2005), 23 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:48,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:48,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:52:48,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:49,307 INFO L130 PetriNetUnfolder]: 1756/3409 cut-off events. [2022-12-13 12:52:49,307 INFO L131 PetriNetUnfolder]: For 40775/41368 co-relation queries the response was YES. [2022-12-13 12:52:49,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18083 conditions, 3409 events. 1756/3409 cut-off events. For 40775/41368 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 25573 event pairs, 1049 based on Foata normal form. 657/4030 useless extension candidates. Maximal degree in co-relation 18045. Up to 1757 conditions per place. [2022-12-13 12:52:49,330 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 100 selfloop transitions, 30 changer transitions 0/131 dead transitions. [2022-12-13 12:52:49,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 131 transitions, 1616 flow [2022-12-13 12:52:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:52:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:52:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 928 transitions. [2022-12-13 12:52:49,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3569230769230769 [2022-12-13 12:52:49,332 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 928 transitions. [2022-12-13 12:52:49,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 928 transitions. [2022-12-13 12:52:49,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:49,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 928 transitions. [2022-12-13 12:52:49,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.8) internal successors, (928), 10 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:49,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:49,337 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:49,337 INFO L175 Difference]: Start difference. First operand has 144 places, 90 transitions, 1017 flow. Second operand 10 states and 928 transitions. [2022-12-13 12:52:49,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 131 transitions, 1616 flow [2022-12-13 12:52:49,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 131 transitions, 1382 flow, removed 64 selfloop flow, removed 15 redundant places. [2022-12-13 12:52:49,416 INFO L231 Difference]: Finished difference. Result has 123 places, 89 transitions, 904 flow [2022-12-13 12:52:49,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=904, PETRI_PLACES=123, PETRI_TRANSITIONS=89} [2022-12-13 12:52:49,416 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 86 predicate places. [2022-12-13 12:52:49,416 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 89 transitions, 904 flow [2022-12-13 12:52:49,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 87.17391304347827) internal successors, (2005), 23 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:49,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:49,417 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2022-12-13 12:52:49,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 12:52:49,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 12:52:49,618 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:49,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:49,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1775778644, now seen corresponding path program 3 times [2022-12-13 12:52:49,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:49,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335910296] [2022-12-13 12:52:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:49,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:49,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:49,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335910296] [2022-12-13 12:52:49,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335910296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:49,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810488110] [2022-12-13 12:52:49,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:52:49,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:49,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:49,847 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:49,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 12:52:49,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 12:52:49,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:52:49,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 12:52:49,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:50,010 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 [2022-12-13 12:52:50,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:50,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:52:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:50,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:50,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:50,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 12:52:50,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:50,335 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 41 treesize of output 37 [2022-12-13 12:52:50,339 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 13 treesize of output 7 [2022-12-13 12:52:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:50,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810488110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:50,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:50,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 12:52:50,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620659525] [2022-12-13 12:52:50,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 12:52:50,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 12:52:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-12-13 12:52:52,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 260 [2022-12-13 12:52:52,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 89 transitions, 904 flow. Second operand has 26 states, 26 states have (on average 96.15384615384616) internal successors, (2500), 26 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:52,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:52,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 260 [2022-12-13 12:52:52,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:55,688 INFO L130 PetriNetUnfolder]: 2205/4006 cut-off events. [2022-12-13 12:52:55,688 INFO L131 PetriNetUnfolder]: For 30892/31632 co-relation queries the response was YES. [2022-12-13 12:52:55,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20072 conditions, 4006 events. 2205/4006 cut-off events. For 30892/31632 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28595 event pairs, 863 based on Foata normal form. 779/4778 useless extension candidates. Maximal degree in co-relation 20043. Up to 1196 conditions per place. [2022-12-13 12:52:55,705 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 141 selfloop transitions, 90 changer transitions 5/237 dead transitions. [2022-12-13 12:52:55,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 237 transitions, 2474 flow [2022-12-13 12:52:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 12:52:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-13 12:52:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4482 transitions. [2022-12-13 12:52:55,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3830769230769231 [2022-12-13 12:52:55,709 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4482 transitions. [2022-12-13 12:52:55,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4482 transitions. [2022-12-13 12:52:55,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:55,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4482 transitions. [2022-12-13 12:52:55,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 99.6) internal successors, (4482), 45 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:55,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 260.0) internal successors, (11960), 46 states have internal predecessors, (11960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:55,719 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 260.0) internal successors, (11960), 46 states have internal predecessors, (11960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:55,719 INFO L175 Difference]: Start difference. First operand has 123 places, 89 transitions, 904 flow. Second operand 45 states and 4482 transitions. [2022-12-13 12:52:55,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 237 transitions, 2474 flow [2022-12-13 12:52:55,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 237 transitions, 2323 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-12-13 12:52:55,743 INFO L231 Difference]: Finished difference. Result has 164 places, 126 transitions, 1437 flow [2022-12-13 12:52:55,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1437, PETRI_PLACES=164, PETRI_TRANSITIONS=126} [2022-12-13 12:52:55,743 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 127 predicate places. [2022-12-13 12:52:55,743 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 126 transitions, 1437 flow [2022-12-13 12:52:55,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 96.15384615384616) internal successors, (2500), 26 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:55,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:55,744 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:55,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 12:52:55,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 12:52:55,944 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:55,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1338500621, now seen corresponding path program 2 times [2022-12-13 12:52:55,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:55,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572704716] [2022-12-13 12:52:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:56,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:56,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572704716] [2022-12-13 12:52:56,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572704716] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:56,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273988493] [2022-12-13 12:52:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:52:56,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:56,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:56,157 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:56,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 12:52:56,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:52:56,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:52:56,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 12:52:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:56,299 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 13 treesize of output 9 [2022-12-13 12:52:56,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:56,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:52:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:56,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:52:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:56,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:56,427 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_699 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_699) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296))) is different from false [2022-12-13 12:52:56,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:56,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:52:56,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:56,471 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 159 treesize of output 149 [2022-12-13 12:52:56,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 126 [2022-12-13 12:52:56,477 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 126 treesize of output 110 [2022-12-13 12:52:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:56,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273988493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:56,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:56,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 12:52:56,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296489293] [2022-12-13 12:52:56,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 12:52:56,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:56,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 12:52:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=396, Unknown=1, NotChecked=40, Total=506 [2022-12-13 12:52:56,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:52:56,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 126 transitions, 1437 flow. Second operand has 23 states, 23 states have (on average 87.30434782608695) internal successors, (2008), 23 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:56,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:56,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:52:56,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:52:57,826 INFO L130 PetriNetUnfolder]: 3178/5729 cut-off events. [2022-12-13 12:52:57,826 INFO L131 PetriNetUnfolder]: For 44676/44812 co-relation queries the response was YES. [2022-12-13 12:52:57,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28754 conditions, 5729 events. 3178/5729 cut-off events. For 44676/44812 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 42345 event pairs, 824 based on Foata normal form. 712/6435 useless extension candidates. Maximal degree in co-relation 28719. Up to 2091 conditions per place. [2022-12-13 12:52:57,851 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 238 selfloop transitions, 14 changer transitions 0/258 dead transitions. [2022-12-13 12:52:57,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 258 transitions, 3743 flow [2022-12-13 12:52:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:52:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:52:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 923 transitions. [2022-12-13 12:52:57,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.355 [2022-12-13 12:52:57,853 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 923 transitions. [2022-12-13 12:52:57,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 923 transitions. [2022-12-13 12:52:57,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:52:57,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 923 transitions. [2022-12-13 12:52:57,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.3) internal successors, (923), 10 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:57,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:57,855 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:57,855 INFO L175 Difference]: Start difference. First operand has 164 places, 126 transitions, 1437 flow. Second operand 10 states and 923 transitions. [2022-12-13 12:52:57,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 258 transitions, 3743 flow [2022-12-13 12:52:57,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 258 transitions, 3539 flow, removed 68 selfloop flow, removed 18 redundant places. [2022-12-13 12:52:57,905 INFO L231 Difference]: Finished difference. Result has 157 places, 128 transitions, 1369 flow [2022-12-13 12:52:57,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1369, PETRI_PLACES=157, PETRI_TRANSITIONS=128} [2022-12-13 12:52:57,906 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 120 predicate places. [2022-12-13 12:52:57,906 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 128 transitions, 1369 flow [2022-12-13 12:52:57,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 87.30434782608695) internal successors, (2008), 23 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:57,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:52:57,906 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:52:57,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 12:52:58,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:58,107 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:52:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1338500622, now seen corresponding path program 1 times [2022-12-13 12:52:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:58,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437678944] [2022-12-13 12:52:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:58,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:58,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437678944] [2022-12-13 12:52:58,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437678944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:58,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706289499] [2022-12-13 12:52:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:58,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:58,308 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:58,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 12:52:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:58,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 12:52:58,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:52:58,433 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 13 treesize of output 9 [2022-12-13 12:52:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:58,455 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 [2022-12-13 12:52:58,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:52:58,479 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 [2022-12-13 12:52:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:58,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:52:58,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:58,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:52:58,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:52:58,603 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 141 treesize of output 131 [2022-12-13 12:52:58,606 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 102 [2022-12-13 12:52:58,609 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 [2022-12-13 12:52:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:52:58,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706289499] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:52:58,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:52:58,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-13 12:52:58,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96946111] [2022-12-13 12:52:58,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:52:58,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:52:58,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:52:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:52:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=351, Unknown=5, NotChecked=0, Total=420 [2022-12-13 12:52:59,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:52:59,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 128 transitions, 1369 flow. Second operand has 21 states, 21 states have (on average 87.33333333333333) internal successors, (1834), 21 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:59,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:52:59,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:52:59,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:00,060 INFO L130 PetriNetUnfolder]: 2931/5298 cut-off events. [2022-12-13 12:53:00,060 INFO L131 PetriNetUnfolder]: For 39009/39075 co-relation queries the response was YES. [2022-12-13 12:53:00,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28977 conditions, 5298 events. 2931/5298 cut-off events. For 39009/39075 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38466 event pairs, 759 based on Foata normal form. 272/5566 useless extension candidates. Maximal degree in co-relation 28939. Up to 2104 conditions per place. [2022-12-13 12:53:00,084 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 237 selfloop transitions, 14 changer transitions 0/257 dead transitions. [2022-12-13 12:53:00,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 257 transitions, 3577 flow [2022-12-13 12:53:00,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:53:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:53:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 920 transitions. [2022-12-13 12:53:00,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35384615384615387 [2022-12-13 12:53:00,086 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 920 transitions. [2022-12-13 12:53:00,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 920 transitions. [2022-12-13 12:53:00,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:00,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 920 transitions. [2022-12-13 12:53:00,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:00,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:00,088 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:00,089 INFO L175 Difference]: Start difference. First operand has 157 places, 128 transitions, 1369 flow. Second operand 10 states and 920 transitions. [2022-12-13 12:53:00,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 257 transitions, 3577 flow [2022-12-13 12:53:00,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 257 transitions, 3543 flow, removed 1 selfloop flow, removed 7 redundant places. [2022-12-13 12:53:00,151 INFO L231 Difference]: Finished difference. Result has 159 places, 127 transitions, 1357 flow [2022-12-13 12:53:00,151 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1357, PETRI_PLACES=159, PETRI_TRANSITIONS=127} [2022-12-13 12:53:00,151 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 122 predicate places. [2022-12-13 12:53:00,151 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 127 transitions, 1357 flow [2022-12-13 12:53:00,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 87.33333333333333) internal successors, (1834), 21 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:00,152 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:00,152 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:00,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 12:53:00,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 12:53:00,353 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:00,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1456157745, now seen corresponding path program 1 times [2022-12-13 12:53:00,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:00,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443739782] [2022-12-13 12:53:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:00,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 12:53:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:00,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443739782] [2022-12-13 12:53:00,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443739782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:53:00,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:53:00,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:53:00,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979003104] [2022-12-13 12:53:00,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:53:00,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:53:00,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:00,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:53:00,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:53:00,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 260 [2022-12-13 12:53:00,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 127 transitions, 1357 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:00,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:00,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 260 [2022-12-13 12:53:00,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:01,088 INFO L130 PetriNetUnfolder]: 2672/4833 cut-off events. [2022-12-13 12:53:01,088 INFO L131 PetriNetUnfolder]: For 31704/31762 co-relation queries the response was YES. [2022-12-13 12:53:01,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25964 conditions, 4833 events. 2672/4833 cut-off events. For 31704/31762 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 34905 event pairs, 98 based on Foata normal form. 264/5093 useless extension candidates. Maximal degree in co-relation 25927. Up to 4312 conditions per place. [2022-12-13 12:53:01,107 INFO L137 encePairwiseOnDemand]: 258/260 looper letters, 151 selfloop transitions, 1 changer transitions 0/158 dead transitions. [2022-12-13 12:53:01,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 158 transitions, 2075 flow [2022-12-13 12:53:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:53:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:53:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2022-12-13 12:53:01,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4717948717948718 [2022-12-13 12:53:01,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2022-12-13 12:53:01,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2022-12-13 12:53:01,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:01,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2022-12-13 12:53:01,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:01,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:01,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:01,111 INFO L175 Difference]: Start difference. First operand has 159 places, 127 transitions, 1357 flow. Second operand 3 states and 368 transitions. [2022-12-13 12:53:01,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 158 transitions, 2075 flow [2022-12-13 12:53:01,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 158 transitions, 2050 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 12:53:01,153 INFO L231 Difference]: Finished difference. Result has 153 places, 126 transitions, 1323 flow [2022-12-13 12:53:01,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1323, PETRI_PLACES=153, PETRI_TRANSITIONS=126} [2022-12-13 12:53:01,153 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 116 predicate places. [2022-12-13 12:53:01,153 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 126 transitions, 1323 flow [2022-12-13 12:53:01,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:01,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:01,154 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:01,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 12:53:01,154 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash -785452713, now seen corresponding path program 2 times [2022-12-13 12:53:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:01,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948182527] [2022-12-13 12:53:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:01,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:01,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:01,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948182527] [2022-12-13 12:53:01,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948182527] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:01,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856211487] [2022-12-13 12:53:01,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:53:01,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:01,396 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:01,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 12:53:01,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:53:01,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:01,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 12:53:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:01,558 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 13 treesize of output 9 [2022-12-13 12:53:01,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:01,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:01,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:01,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:01,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:01,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:01,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-12-13 12:53:01,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:01,941 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 175 treesize of output 163 [2022-12-13 12:53:01,946 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 146 treesize of output 122 [2022-12-13 12:53:01,952 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 67 treesize of output 55 [2022-12-13 12:53:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:02,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856211487] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:02,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:02,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 12:53:02,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722264129] [2022-12-13 12:53:02,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:02,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 12:53:02,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 12:53:02,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=716, Unknown=1, NotChecked=0, Total=812 [2022-12-13 12:53:03,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 260 [2022-12-13 12:53:03,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 126 transitions, 1323 flow. Second operand has 29 states, 29 states have (on average 82.13793103448276) internal successors, (2382), 29 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:03,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:03,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 260 [2022-12-13 12:53:03,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:07,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:53:23,884 INFO L130 PetriNetUnfolder]: 2824/5219 cut-off events. [2022-12-13 12:53:23,884 INFO L131 PetriNetUnfolder]: For 36157/36931 co-relation queries the response was YES. [2022-12-13 12:53:23,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25478 conditions, 5219 events. 2824/5219 cut-off events. For 36157/36931 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 39862 event pairs, 710 based on Foata normal form. 1117/6334 useless extension candidates. Maximal degree in co-relation 25441. Up to 1419 conditions per place. [2022-12-13 12:53:23,908 INFO L137 encePairwiseOnDemand]: 249/260 looper letters, 328 selfloop transitions, 81 changer transitions 13/423 dead transitions. [2022-12-13 12:53:23,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 423 transitions, 4262 flow [2022-12-13 12:53:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 12:53:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 12:53:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3310 transitions. [2022-12-13 12:53:23,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34407484407484407 [2022-12-13 12:53:23,912 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3310 transitions. [2022-12-13 12:53:23,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3310 transitions. [2022-12-13 12:53:23,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:23,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3310 transitions. [2022-12-13 12:53:23,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 89.45945945945945) internal successors, (3310), 37 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:23,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 260.0) internal successors, (9880), 38 states have internal predecessors, (9880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:23,919 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 260.0) internal successors, (9880), 38 states have internal predecessors, (9880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:23,920 INFO L175 Difference]: Start difference. First operand has 153 places, 126 transitions, 1323 flow. Second operand 37 states and 3310 transitions. [2022-12-13 12:53:23,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 423 transitions, 4262 flow [2022-12-13 12:53:23,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 423 transitions, 4176 flow, removed 9 selfloop flow, removed 5 redundant places. [2022-12-13 12:53:23,977 INFO L231 Difference]: Finished difference. Result has 195 places, 147 transitions, 1737 flow [2022-12-13 12:53:23,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1737, PETRI_PLACES=195, PETRI_TRANSITIONS=147} [2022-12-13 12:53:23,977 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 158 predicate places. [2022-12-13 12:53:23,977 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 147 transitions, 1737 flow [2022-12-13 12:53:23,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 82.13793103448276) internal successors, (2382), 29 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:23,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:23,978 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:23,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 12:53:24,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 12:53:24,179 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash -785452712, now seen corresponding path program 2 times [2022-12-13 12:53:24,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:24,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875402800] [2022-12-13 12:53:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:24,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:24,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:24,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875402800] [2022-12-13 12:53:24,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875402800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:24,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276197863] [2022-12-13 12:53:24,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:53:24,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:24,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:24,473 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:24,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 12:53:24,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:53:24,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:24,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 12:53:24,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:24,679 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 13 treesize of output 9 [2022-12-13 12:53:24,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:24,717 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 [2022-12-13 12:53:24,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:24,800 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 [2022-12-13 12:53:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:24,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:24,915 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_838 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_838) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 8)) 4294967296)) is different from false [2022-12-13 12:53:24,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:24,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:53:24,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:25,000 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 71 treesize of output 67 [2022-12-13 12:53:25,003 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 54 treesize of output 46 [2022-12-13 12:53:25,007 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 24 treesize of output 20 [2022-12-13 12:53:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-13 12:53:25,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276197863] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:25,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:25,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 12:53:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718730570] [2022-12-13 12:53:25,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:25,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 12:53:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 12:53:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=652, Unknown=14, NotChecked=52, Total=812 [2022-12-13 12:53:25,176 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:53:25,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 147 transitions, 1737 flow. Second operand has 29 states, 29 states have (on average 87.13793103448276) internal successors, (2527), 29 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:25,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:25,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:53:25,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:26,565 INFO L130 PetriNetUnfolder]: 2718/5041 cut-off events. [2022-12-13 12:53:26,565 INFO L131 PetriNetUnfolder]: For 51066/51760 co-relation queries the response was YES. [2022-12-13 12:53:26,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26719 conditions, 5041 events. 2718/5041 cut-off events. For 51066/51760 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37141 event pairs, 1490 based on Foata normal form. 766/5805 useless extension candidates. Maximal degree in co-relation 26675. Up to 1963 conditions per place. [2022-12-13 12:53:26,597 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 168 selfloop transitions, 42 changer transitions 1/212 dead transitions. [2022-12-13 12:53:26,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 212 transitions, 2671 flow [2022-12-13 12:53:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:53:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:53:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1122 transitions. [2022-12-13 12:53:26,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3596153846153846 [2022-12-13 12:53:26,599 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1122 transitions. [2022-12-13 12:53:26,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1122 transitions. [2022-12-13 12:53:26,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:26,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1122 transitions. [2022-12-13 12:53:26,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.5) internal successors, (1122), 12 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:26,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:26,602 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:26,602 INFO L175 Difference]: Start difference. First operand has 195 places, 147 transitions, 1737 flow. Second operand 12 states and 1122 transitions. [2022-12-13 12:53:26,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 212 transitions, 2671 flow [2022-12-13 12:53:26,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 212 transitions, 2523 flow, removed 33 selfloop flow, removed 13 redundant places. [2022-12-13 12:53:26,727 INFO L231 Difference]: Finished difference. Result has 193 places, 146 transitions, 1653 flow [2022-12-13 12:53:26,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1653, PETRI_PLACES=193, PETRI_TRANSITIONS=146} [2022-12-13 12:53:26,728 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 156 predicate places. [2022-12-13 12:53:26,728 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 146 transitions, 1653 flow [2022-12-13 12:53:26,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 87.13793103448276) internal successors, (2527), 29 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:26,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:26,728 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:26,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 12:53:26,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:26,929 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:26,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1456157672, now seen corresponding path program 3 times [2022-12-13 12:53:26,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:26,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250095371] [2022-12-13 12:53:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:26,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:27,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:27,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250095371] [2022-12-13 12:53:27,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250095371] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:27,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883548940] [2022-12-13 12:53:27,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:53:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:27,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:27,009 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:27,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 12:53:27,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:53:27,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 12:53:27,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:27,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:27,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883548940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:27,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:27,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 12:53:27,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138267078] [2022-12-13 12:53:27,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:27,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:53:27,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:53:27,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:53:27,390 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:53:27,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 146 transitions, 1653 flow. Second operand has 19 states, 19 states have (on average 104.3157894736842) internal successors, (1982), 19 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:27,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:27,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:53:27,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:28,303 INFO L130 PetriNetUnfolder]: 2750/5142 cut-off events. [2022-12-13 12:53:28,303 INFO L131 PetriNetUnfolder]: For 42598/42695 co-relation queries the response was YES. [2022-12-13 12:53:28,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26580 conditions, 5142 events. 2750/5142 cut-off events. For 42598/42695 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 37792 event pairs, 1209 based on Foata normal form. 259/5395 useless extension candidates. Maximal degree in co-relation 26538. Up to 3029 conditions per place. [2022-12-13 12:53:28,327 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 129 selfloop transitions, 5 changer transitions 134/274 dead transitions. [2022-12-13 12:53:28,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 274 transitions, 3534 flow [2022-12-13 12:53:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:53:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:53:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1310 transitions. [2022-12-13 12:53:28,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4198717948717949 [2022-12-13 12:53:28,329 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1310 transitions. [2022-12-13 12:53:28,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1310 transitions. [2022-12-13 12:53:28,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:28,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1310 transitions. [2022-12-13 12:53:28,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 109.16666666666667) internal successors, (1310), 12 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:28,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:28,333 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:28,333 INFO L175 Difference]: Start difference. First operand has 193 places, 146 transitions, 1653 flow. Second operand 12 states and 1310 transitions. [2022-12-13 12:53:28,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 274 transitions, 3534 flow [2022-12-13 12:53:28,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 274 transitions, 3355 flow, removed 3 selfloop flow, removed 10 redundant places. [2022-12-13 12:53:28,424 INFO L231 Difference]: Finished difference. Result has 198 places, 119 transitions, 1297 flow [2022-12-13 12:53:28,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1297, PETRI_PLACES=198, PETRI_TRANSITIONS=119} [2022-12-13 12:53:28,424 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 161 predicate places. [2022-12-13 12:53:28,424 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 119 transitions, 1297 flow [2022-12-13 12:53:28,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 104.3157894736842) internal successors, (1982), 19 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:28,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:28,425 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:28,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 12:53:28,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:28,626 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:28,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1421368296, now seen corresponding path program 3 times [2022-12-13 12:53:28,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:28,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014122010] [2022-12-13 12:53:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:28,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:28,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014122010] [2022-12-13 12:53:28,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014122010] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683661525] [2022-12-13 12:53:28,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:53:28,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:28,796 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:28,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 12:53:28,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 12:53:28,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 12:53:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:29,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:29,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683661525] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:29,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:29,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-13 12:53:29,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998358113] [2022-12-13 12:53:29,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:29,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 12:53:29,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:29,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 12:53:29,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:53:29,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:53:29,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 119 transitions, 1297 flow. Second operand has 24 states, 24 states have (on average 104.25) internal successors, (2502), 24 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:29,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:29,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:53:29,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:30,227 INFO L130 PetriNetUnfolder]: 1832/3481 cut-off events. [2022-12-13 12:53:30,227 INFO L131 PetriNetUnfolder]: For 43862/44371 co-relation queries the response was YES. [2022-12-13 12:53:30,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19897 conditions, 3481 events. 1832/3481 cut-off events. For 43862/44371 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25155 event pairs, 815 based on Foata normal form. 595/4074 useless extension candidates. Maximal degree in co-relation 19852. Up to 1361 conditions per place. [2022-12-13 12:53:30,242 INFO L137 encePairwiseOnDemand]: 253/260 looper letters, 152 selfloop transitions, 40 changer transitions 9/202 dead transitions. [2022-12-13 12:53:30,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 202 transitions, 2287 flow [2022-12-13 12:53:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 12:53:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 12:53:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1653 transitions. [2022-12-13 12:53:30,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4238461538461539 [2022-12-13 12:53:30,244 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1653 transitions. [2022-12-13 12:53:30,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1653 transitions. [2022-12-13 12:53:30,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:30,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1653 transitions. [2022-12-13 12:53:30,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 110.2) internal successors, (1653), 15 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:30,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 260.0) internal successors, (4160), 16 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:30,247 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 260.0) internal successors, (4160), 16 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:30,247 INFO L175 Difference]: Start difference. First operand has 198 places, 119 transitions, 1297 flow. Second operand 15 states and 1653 transitions. [2022-12-13 12:53:30,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 202 transitions, 2287 flow [2022-12-13 12:53:30,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 202 transitions, 2090 flow, removed 75 selfloop flow, removed 14 redundant places. [2022-12-13 12:53:30,342 INFO L231 Difference]: Finished difference. Result has 172 places, 118 transitions, 1286 flow [2022-12-13 12:53:30,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1286, PETRI_PLACES=172, PETRI_TRANSITIONS=118} [2022-12-13 12:53:30,343 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 135 predicate places. [2022-12-13 12:53:30,343 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 118 transitions, 1286 flow [2022-12-13 12:53:30,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 104.25) internal successors, (2502), 24 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:30,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:30,343 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:30,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 12:53:30,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 12:53:30,544 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1048089833, now seen corresponding path program 2 times [2022-12-13 12:53:30,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:30,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433171207] [2022-12-13 12:53:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:30,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:30,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433171207] [2022-12-13 12:53:30,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433171207] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020366364] [2022-12-13 12:53:30,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:53:30,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:30,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:30,824 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:30,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 12:53:30,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:53:30,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:30,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:53:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:31,028 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 [2022-12-13 12:53:31,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:31,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:31,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:31,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:31,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:31,414 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_952 (Array Int Int)) (|v_thread2Thread1of1ForFork0_~i~1#1_93| Int)) (or (< |v_thread2Thread1of1ForFork0_~i~1#1_93| 2) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_952) c_~A~0.base) (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork0_~i~1#1_93| 4))) 9223372039002259456) (not (< |v_thread2Thread1of1ForFork0_~i~1#1_93| c_~N~0)))) is different from false [2022-12-13 12:53:31,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:31,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:53:31,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:31,497 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 79 treesize of output 75 [2022-12-13 12:53:31,502 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 60 treesize of output 48 [2022-12-13 12:53:31,507 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 26 treesize of output 20 [2022-12-13 12:53:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:31,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020366364] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:31,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:31,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 12:53:31,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352936625] [2022-12-13 12:53:31,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:31,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 12:53:31,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:31,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 12:53:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=664, Unknown=1, NotChecked=52, Total=812 [2022-12-13 12:53:31,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 260 [2022-12-13 12:53:31,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 118 transitions, 1286 flow. Second operand has 29 states, 29 states have (on average 78.24137931034483) internal successors, (2269), 29 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:31,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:31,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 260 [2022-12-13 12:53:31,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:35,567 INFO L130 PetriNetUnfolder]: 2611/4826 cut-off events. [2022-12-13 12:53:35,567 INFO L131 PetriNetUnfolder]: For 35153/35315 co-relation queries the response was YES. [2022-12-13 12:53:35,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26577 conditions, 4826 events. 2611/4826 cut-off events. For 35153/35315 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 35038 event pairs, 215 based on Foata normal form. 452/5270 useless extension candidates. Maximal degree in co-relation 26540. Up to 1397 conditions per place. [2022-12-13 12:53:35,589 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 348 selfloop transitions, 36 changer transitions 64/454 dead transitions. [2022-12-13 12:53:35,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 454 transitions, 5979 flow [2022-12-13 12:53:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 12:53:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 12:53:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2521 transitions. [2022-12-13 12:53:35,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3232051282051282 [2022-12-13 12:53:35,593 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2521 transitions. [2022-12-13 12:53:35,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2521 transitions. [2022-12-13 12:53:35,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:35,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2521 transitions. [2022-12-13 12:53:35,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 84.03333333333333) internal successors, (2521), 30 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:35,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 260.0) internal successors, (8060), 31 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:35,599 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 260.0) internal successors, (8060), 31 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:35,599 INFO L175 Difference]: Start difference. First operand has 172 places, 118 transitions, 1286 flow. Second operand 30 states and 2521 transitions. [2022-12-13 12:53:35,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 454 transitions, 5979 flow [2022-12-13 12:53:35,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 454 transitions, 5837 flow, removed 22 selfloop flow, removed 8 redundant places. [2022-12-13 12:53:35,687 INFO L231 Difference]: Finished difference. Result has 200 places, 144 transitions, 1559 flow [2022-12-13 12:53:35,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1559, PETRI_PLACES=200, PETRI_TRANSITIONS=144} [2022-12-13 12:53:35,688 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 163 predicate places. [2022-12-13 12:53:35,688 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 144 transitions, 1559 flow [2022-12-13 12:53:35,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 78.24137931034483) internal successors, (2269), 29 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:35,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:35,688 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:35,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 12:53:35,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 12:53:35,889 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:35,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:35,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1048089834, now seen corresponding path program 4 times [2022-12-13 12:53:35,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:35,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562011607] [2022-12-13 12:53:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:35,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:36,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:36,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562011607] [2022-12-13 12:53:36,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562011607] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:36,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263465635] [2022-12-13 12:53:36,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:53:36,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:36,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:36,176 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:36,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 12:53:36,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:53:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:36,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 12:53:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:36,349 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 13 treesize of output 9 [2022-12-13 12:53:36,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:36,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:36,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:36,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:36,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:36,554 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_994 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_994) c_~A~0.base) (+ c_~A~0.offset 8)) 4294967296))) is different from false [2022-12-13 12:53:36,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:36,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:53:36,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:36,609 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 81 treesize of output 77 [2022-12-13 12:53:36,614 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 32 treesize of output 28 [2022-12-13 12:53:36,618 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 58 treesize of output 50 [2022-12-13 12:53:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:36,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263465635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:36,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:36,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-13 12:53:36,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135517131] [2022-12-13 12:53:36,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:36,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 12:53:36,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:36,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 12:53:36,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=569, Unknown=3, NotChecked=48, Total=702 [2022-12-13 12:53:36,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:53:36,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 144 transitions, 1559 flow. Second operand has 27 states, 27 states have (on average 87.25925925925925) internal successors, (2356), 27 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:36,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:36,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:53:36,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:38,023 INFO L130 PetriNetUnfolder]: 2289/4372 cut-off events. [2022-12-13 12:53:38,023 INFO L131 PetriNetUnfolder]: For 43268/43426 co-relation queries the response was YES. [2022-12-13 12:53:38,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25874 conditions, 4372 events. 2289/4372 cut-off events. For 43268/43426 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 32151 event pairs, 610 based on Foata normal form. 464/4828 useless extension candidates. Maximal degree in co-relation 25829. Up to 1686 conditions per place. [2022-12-13 12:53:38,047 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 262 selfloop transitions, 25 changer transitions 0/293 dead transitions. [2022-12-13 12:53:38,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 293 transitions, 4063 flow [2022-12-13 12:53:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:53:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:53:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1103 transitions. [2022-12-13 12:53:38,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35352564102564105 [2022-12-13 12:53:38,049 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1103 transitions. [2022-12-13 12:53:38,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1103 transitions. [2022-12-13 12:53:38,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:38,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1103 transitions. [2022-12-13 12:53:38,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 91.91666666666667) internal successors, (1103), 12 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:38,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:38,051 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:38,051 INFO L175 Difference]: Start difference. First operand has 200 places, 144 transitions, 1559 flow. Second operand 12 states and 1103 transitions. [2022-12-13 12:53:38,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 293 transitions, 4063 flow [2022-12-13 12:53:38,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 293 transitions, 3990 flow, removed 20 selfloop flow, removed 9 redundant places. [2022-12-13 12:53:38,135 INFO L231 Difference]: Finished difference. Result has 202 places, 143 transitions, 1521 flow [2022-12-13 12:53:38,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1521, PETRI_PLACES=202, PETRI_TRANSITIONS=143} [2022-12-13 12:53:38,136 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 165 predicate places. [2022-12-13 12:53:38,136 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 143 transitions, 1521 flow [2022-12-13 12:53:38,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 87.25925925925925) internal successors, (2356), 27 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:38,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:38,136 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:38,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 12:53:38,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:38,337 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:38,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:38,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1868949551, now seen corresponding path program 5 times [2022-12-13 12:53:38,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:38,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440029128] [2022-12-13 12:53:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:38,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:38,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:38,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440029128] [2022-12-13 12:53:38,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440029128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:38,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504824768] [2022-12-13 12:53:38,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:53:38,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:38,477 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:38,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 12:53:38,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 12:53:38,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:38,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 12:53:38,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:38,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:38,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504824768] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:38,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:38,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-13 12:53:38,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22218281] [2022-12-13 12:53:38,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:38,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 12:53:38,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 12:53:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:53:38,993 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:53:38,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 143 transitions, 1521 flow. Second operand has 24 states, 24 states have (on average 104.25) internal successors, (2502), 24 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:38,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:38,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:53:38,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:40,077 INFO L130 PetriNetUnfolder]: 2180/4213 cut-off events. [2022-12-13 12:53:40,077 INFO L131 PetriNetUnfolder]: For 31656/31815 co-relation queries the response was YES. [2022-12-13 12:53:40,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24283 conditions, 4213 events. 2180/4213 cut-off events. For 31656/31815 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30956 event pairs, 926 based on Foata normal form. 259/4466 useless extension candidates. Maximal degree in co-relation 24238. Up to 2159 conditions per place. [2022-12-13 12:53:40,105 INFO L137 encePairwiseOnDemand]: 253/260 looper letters, 101 selfloop transitions, 13 changer transitions 166/284 dead transitions. [2022-12-13 12:53:40,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 284 transitions, 3603 flow [2022-12-13 12:53:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 12:53:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 12:53:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1631 transitions. [2022-12-13 12:53:40,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41820512820512823 [2022-12-13 12:53:40,108 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1631 transitions. [2022-12-13 12:53:40,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1631 transitions. [2022-12-13 12:53:40,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:40,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1631 transitions. [2022-12-13 12:53:40,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 108.73333333333333) internal successors, (1631), 15 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:40,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 260.0) internal successors, (4160), 16 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:40,114 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 260.0) internal successors, (4160), 16 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:40,114 INFO L175 Difference]: Start difference. First operand has 202 places, 143 transitions, 1521 flow. Second operand 15 states and 1631 transitions. [2022-12-13 12:53:40,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 284 transitions, 3603 flow [2022-12-13 12:53:40,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 284 transitions, 3562 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 12:53:40,197 INFO L231 Difference]: Finished difference. Result has 209 places, 102 transitions, 1092 flow [2022-12-13 12:53:40,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1092, PETRI_PLACES=209, PETRI_TRANSITIONS=102} [2022-12-13 12:53:40,198 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 172 predicate places. [2022-12-13 12:53:40,198 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 102 transitions, 1092 flow [2022-12-13 12:53:40,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 104.25) internal successors, (2502), 24 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:40,199 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:40,199 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-12-13 12:53:40,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 12:53:40,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:40,399 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:40,400 INFO L85 PathProgramCache]: Analyzing trace with hash -958702420, now seen corresponding path program 4 times [2022-12-13 12:53:40,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:40,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258596823] [2022-12-13 12:53:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:40,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:40,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:40,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258596823] [2022-12-13 12:53:40,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258596823] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:40,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725489850] [2022-12-13 12:53:40,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:53:40,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:40,751 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:40,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 12:53:40,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:53:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:40,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:53:40,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:40,951 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 13 treesize of output 9 [2022-12-13 12:53:40,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:40,980 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 [2022-12-13 12:53:41,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:41,007 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 [2022-12-13 12:53:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:41,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:41,169 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1079 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1079) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:53:41,234 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:53:41,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-12-13 12:53:41,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:41,239 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 37 treesize of output 33 [2022-12-13 12:53:41,242 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 7 treesize of output 3 [2022-12-13 12:53:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-13 12:53:41,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725489850] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:41,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:41,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-13 12:53:41,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108952245] [2022-12-13 12:53:41,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:41,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 12:53:41,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:41,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 12:53:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=889, Unknown=6, NotChecked=60, Total=1056 [2022-12-13 12:53:41,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 12:53:41,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 102 transitions, 1092 flow. Second operand has 33 states, 33 states have (on average 90.12121212121212) internal successors, (2974), 33 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:41,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:41,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 12:53:41,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:42,345 INFO L130 PetriNetUnfolder]: 1585/3046 cut-off events. [2022-12-13 12:53:42,345 INFO L131 PetriNetUnfolder]: For 31740/32138 co-relation queries the response was YES. [2022-12-13 12:53:42,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18744 conditions, 3046 events. 1585/3046 cut-off events. For 31740/32138 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21559 event pairs, 1211 based on Foata normal form. 396/3415 useless extension candidates. Maximal degree in co-relation 18698. Up to 2771 conditions per place. [2022-12-13 12:53:42,361 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 99 selfloop transitions, 47 changer transitions 0/148 dead transitions. [2022-12-13 12:53:42,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 148 transitions, 1870 flow [2022-12-13 12:53:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:53:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 12:53:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1484 transitions. [2022-12-13 12:53:42,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35673076923076924 [2022-12-13 12:53:42,363 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1484 transitions. [2022-12-13 12:53:42,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1484 transitions. [2022-12-13 12:53:42,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:42,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1484 transitions. [2022-12-13 12:53:42,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 92.75) internal successors, (1484), 16 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:42,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:42,367 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:42,367 INFO L175 Difference]: Start difference. First operand has 209 places, 102 transitions, 1092 flow. Second operand 16 states and 1484 transitions. [2022-12-13 12:53:42,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 148 transitions, 1870 flow [2022-12-13 12:53:42,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 148 transitions, 1732 flow, removed 40 selfloop flow, removed 19 redundant places. [2022-12-13 12:53:42,434 INFO L231 Difference]: Finished difference. Result has 171 places, 109 transitions, 1202 flow [2022-12-13 12:53:42,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1202, PETRI_PLACES=171, PETRI_TRANSITIONS=109} [2022-12-13 12:53:42,434 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 134 predicate places. [2022-12-13 12:53:42,434 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 109 transitions, 1202 flow [2022-12-13 12:53:42,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 90.12121212121212) internal successors, (2974), 33 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:42,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:42,435 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-12-13 12:53:42,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 12:53:42,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 12:53:42,636 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash -958702421, now seen corresponding path program 3 times [2022-12-13 12:53:42,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:42,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293498549] [2022-12-13 12:53:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:42,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:42,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293498549] [2022-12-13 12:53:42,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293498549] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377984243] [2022-12-13 12:53:42,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:53:42,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:42,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:42,985 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:42,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 12:53:43,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 12:53:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:53:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:43,229 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 13 treesize of output 9 [2022-12-13 12:53:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:43,260 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 27 treesize of output 26 [2022-12-13 12:53:43,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:43,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:43,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:43,471 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1126 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1126) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 12:53:43,542 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:53:43,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2022-12-13 12:53:43,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:43,549 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 43 treesize of output 39 [2022-12-13 12:53:43,557 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 9 treesize of output 5 [2022-12-13 12:53:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-13 12:53:43,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377984243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:43,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:43,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-13 12:53:43,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952234535] [2022-12-13 12:53:43,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:43,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 12:53:43,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:43,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 12:53:43,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=889, Unknown=6, NotChecked=60, Total=1056 [2022-12-13 12:53:43,707 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 12:53:43,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 109 transitions, 1202 flow. Second operand has 33 states, 33 states have (on average 90.12121212121212) internal successors, (2974), 33 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:43,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:43,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 12:53:43,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:44,576 INFO L130 PetriNetUnfolder]: 1573/3013 cut-off events. [2022-12-13 12:53:44,577 INFO L131 PetriNetUnfolder]: For 16623/17009 co-relation queries the response was YES. [2022-12-13 12:53:44,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17528 conditions, 3013 events. 1573/3013 cut-off events. For 16623/17009 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21073 event pairs, 1059 based on Foata normal form. 387/3376 useless extension candidates. Maximal degree in co-relation 17494. Up to 2632 conditions per place. [2022-12-13 12:53:44,591 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 84 selfloop transitions, 47 changer transitions 0/133 dead transitions. [2022-12-13 12:53:44,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 133 transitions, 1678 flow [2022-12-13 12:53:44,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 12:53:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 12:53:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1387 transitions. [2022-12-13 12:53:44,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3556410256410256 [2022-12-13 12:53:44,593 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1387 transitions. [2022-12-13 12:53:44,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1387 transitions. [2022-12-13 12:53:44,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:44,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1387 transitions. [2022-12-13 12:53:44,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 92.46666666666667) internal successors, (1387), 15 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:44,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 260.0) internal successors, (4160), 16 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:44,597 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 260.0) internal successors, (4160), 16 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:44,597 INFO L175 Difference]: Start difference. First operand has 171 places, 109 transitions, 1202 flow. Second operand 15 states and 1387 transitions. [2022-12-13 12:53:44,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 133 transitions, 1678 flow [2022-12-13 12:53:44,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 133 transitions, 1571 flow, removed 5 selfloop flow, removed 12 redundant places. [2022-12-13 12:53:44,617 INFO L231 Difference]: Finished difference. Result has 173 places, 107 transitions, 1159 flow [2022-12-13 12:53:44,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1159, PETRI_PLACES=173, PETRI_TRANSITIONS=107} [2022-12-13 12:53:44,617 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 136 predicate places. [2022-12-13 12:53:44,617 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 107 transitions, 1159 flow [2022-12-13 12:53:44,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 90.12121212121212) internal successors, (2974), 33 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:44,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:44,618 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-12-13 12:53:44,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 12:53:44,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:44,819 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1656167892, now seen corresponding path program 1 times [2022-12-13 12:53:44,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:44,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032030055] [2022-12-13 12:53:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:44,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 12:53:44,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:44,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032030055] [2022-12-13 12:53:44,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032030055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:44,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223334476] [2022-12-13 12:53:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:44,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:44,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:44,884 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:44,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 12:53:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 12:53:45,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 12:53:45,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 12:53:45,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223334476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:45,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:45,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 12:53:45,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863590271] [2022-12-13 12:53:45,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:45,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:53:45,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:53:45,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:53:45,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 260 [2022-12-13 12:53:45,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 107 transitions, 1159 flow. Second operand has 13 states, 13 states have (on average 114.38461538461539) internal successors, (1487), 13 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:45,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:45,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 260 [2022-12-13 12:53:45,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:46,298 INFO L130 PetriNetUnfolder]: 3745/7218 cut-off events. [2022-12-13 12:53:46,298 INFO L131 PetriNetUnfolder]: For 42277/43422 co-relation queries the response was YES. [2022-12-13 12:53:46,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42416 conditions, 7218 events. 3745/7218 cut-off events. For 42277/43422 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 57566 event pairs, 1254 based on Foata normal form. 1397/8599 useless extension candidates. Maximal degree in co-relation 42383. Up to 2081 conditions per place. [2022-12-13 12:53:46,333 INFO L137 encePairwiseOnDemand]: 257/260 looper letters, 423 selfloop transitions, 26 changer transitions 0/451 dead transitions. [2022-12-13 12:53:46,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 451 transitions, 5456 flow [2022-12-13 12:53:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:53:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:53:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1516 transitions. [2022-12-13 12:53:46,335 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4858974358974359 [2022-12-13 12:53:46,335 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1516 transitions. [2022-12-13 12:53:46,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1516 transitions. [2022-12-13 12:53:46,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:46,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1516 transitions. [2022-12-13 12:53:46,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.33333333333333) internal successors, (1516), 12 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:46,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:46,338 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:46,338 INFO L175 Difference]: Start difference. First operand has 173 places, 107 transitions, 1159 flow. Second operand 12 states and 1516 transitions. [2022-12-13 12:53:46,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 451 transitions, 5456 flow [2022-12-13 12:53:46,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 451 transitions, 5300 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-12-13 12:53:46,385 INFO L231 Difference]: Finished difference. Result has 178 places, 113 transitions, 1252 flow [2022-12-13 12:53:46,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1252, PETRI_PLACES=178, PETRI_TRANSITIONS=113} [2022-12-13 12:53:46,385 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 141 predicate places. [2022-12-13 12:53:46,385 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 113 transitions, 1252 flow [2022-12-13 12:53:46,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.38461538461539) internal successors, (1487), 13 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:46,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:46,385 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:46,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 12:53:46,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 12:53:46,586 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1655572006, now seen corresponding path program 4 times [2022-12-13 12:53:46,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:46,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694544420] [2022-12-13 12:53:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:47,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:47,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694544420] [2022-12-13 12:53:47,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694544420] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:47,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684837893] [2022-12-13 12:53:47,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:53:47,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:47,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:47,016 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:47,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 12:53:47,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:53:47,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:47,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 12:53:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:47,212 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 13 treesize of output 9 [2022-12-13 12:53:47,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:47,251 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 [2022-12-13 12:53:47,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:47,326 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 [2022-12-13 12:53:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:47,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:47,444 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1210 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1210) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 8)) 4294967296)) is different from false [2022-12-13 12:53:47,481 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1210 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1210) c_~A~0.base) (+ c_~A~0.offset 12)) 4294967296)) is different from false [2022-12-13 12:53:47,487 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1210 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1209) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1210) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:53:47,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:47,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:53:47,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:47,501 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 141 treesize of output 131 [2022-12-13 12:53:47,505 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 102 [2022-12-13 12:53:47,510 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 55 treesize of output 47 [2022-12-13 12:53:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-12-13 12:53:47,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684837893] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:47,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:47,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 12:53:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586889988] [2022-12-13 12:53:47,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:47,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 12:53:47,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:47,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 12:53:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=906, Unknown=8, NotChecked=186, Total=1190 [2022-12-13 12:53:47,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:53:47,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 113 transitions, 1252 flow. Second operand has 35 states, 35 states have (on average 87.11428571428571) internal successors, (3049), 35 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:47,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:47,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:53:47,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:49,933 INFO L130 PetriNetUnfolder]: 3680/7105 cut-off events. [2022-12-13 12:53:49,933 INFO L131 PetriNetUnfolder]: For 37461/38541 co-relation queries the response was YES. [2022-12-13 12:53:49,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42621 conditions, 7105 events. 3680/7105 cut-off events. For 37461/38541 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 56587 event pairs, 2331 based on Foata normal form. 1124/8197 useless extension candidates. Maximal degree in co-relation 42582. Up to 4345 conditions per place. [2022-12-13 12:53:49,963 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 215 selfloop transitions, 33 changer transitions 0/250 dead transitions. [2022-12-13 12:53:49,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 250 transitions, 2958 flow [2022-12-13 12:53:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:53:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:53:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1294 transitions. [2022-12-13 12:53:49,965 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3554945054945055 [2022-12-13 12:53:49,965 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1294 transitions. [2022-12-13 12:53:49,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1294 transitions. [2022-12-13 12:53:49,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:49,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1294 transitions. [2022-12-13 12:53:49,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 92.42857142857143) internal successors, (1294), 14 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:49,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:49,969 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:49,969 INFO L175 Difference]: Start difference. First operand has 178 places, 113 transitions, 1252 flow. Second operand 14 states and 1294 transitions. [2022-12-13 12:53:49,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 250 transitions, 2958 flow [2022-12-13 12:53:50,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 250 transitions, 2904 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-12-13 12:53:50,039 INFO L231 Difference]: Finished difference. Result has 188 places, 114 transitions, 1311 flow [2022-12-13 12:53:50,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1311, PETRI_PLACES=188, PETRI_TRANSITIONS=114} [2022-12-13 12:53:50,039 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 151 predicate places. [2022-12-13 12:53:50,040 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 114 transitions, 1311 flow [2022-12-13 12:53:50,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 87.11428571428571) internal successors, (3049), 35 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:50,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:50,040 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:50,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 12:53:50,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 12:53:50,241 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:50,242 INFO L85 PathProgramCache]: Analyzing trace with hash -61944443, now seen corresponding path program 3 times [2022-12-13 12:53:50,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:50,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330673341] [2022-12-13 12:53:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:50,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:50,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330673341] [2022-12-13 12:53:50,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330673341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191040905] [2022-12-13 12:53:50,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:53:50,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:50,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:50,707 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:50,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 12:53:50,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 12:53:50,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 12:53:50,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:50,938 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 13 treesize of output 9 [2022-12-13 12:53:50,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:50,971 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 27 treesize of output 26 [2022-12-13 12:53:51,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:51,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:51,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:51,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:51,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:51,194 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1262 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1262) c_~A~0.base) (+ c_~A~0.offset 12)) 9223372039002259456))) is different from false [2022-12-13 12:53:51,200 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1262 (Array Int Int)) (v_ArrVal_1261 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1261) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1262) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 12:53:51,279 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:53:51,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2022-12-13 12:53:51,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:51,285 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 81 treesize of output 77 [2022-12-13 12:53:51,288 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 62 treesize of output 54 [2022-12-13 12:53:51,292 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 28 treesize of output 24 [2022-12-13 12:53:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-13 12:53:51,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191040905] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:51,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:51,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-12-13 12:53:51,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563049566] [2022-12-13 12:53:51,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:51,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 12:53:51,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 12:53:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1012, Unknown=6, NotChecked=130, Total=1260 [2022-12-13 12:53:51,535 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:53:51,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 114 transitions, 1311 flow. Second operand has 36 states, 36 states have (on average 87.13888888888889) internal successors, (3137), 36 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:51,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:51,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:53:51,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:53,320 INFO L130 PetriNetUnfolder]: 3646/7048 cut-off events. [2022-12-13 12:53:53,320 INFO L131 PetriNetUnfolder]: For 40018/41086 co-relation queries the response was YES. [2022-12-13 12:53:53,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42626 conditions, 7048 events. 3646/7048 cut-off events. For 40018/41086 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 56098 event pairs, 2142 based on Foata normal form. 1091/8107 useless extension candidates. Maximal degree in co-relation 42585. Up to 3981 conditions per place. [2022-12-13 12:53:53,355 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 222 selfloop transitions, 34 changer transitions 0/258 dead transitions. [2022-12-13 12:53:53,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 258 transitions, 3072 flow [2022-12-13 12:53:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:53:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:53:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1293 transitions. [2022-12-13 12:53:53,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35521978021978023 [2022-12-13 12:53:53,357 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1293 transitions. [2022-12-13 12:53:53,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1293 transitions. [2022-12-13 12:53:53,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:53,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1293 transitions. [2022-12-13 12:53:53,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 92.35714285714286) internal successors, (1293), 14 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:53,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:53,360 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:53,360 INFO L175 Difference]: Start difference. First operand has 188 places, 114 transitions, 1311 flow. Second operand 14 states and 1293 transitions. [2022-12-13 12:53:53,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 258 transitions, 3072 flow [2022-12-13 12:53:53,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 258 transitions, 2984 flow, removed 3 selfloop flow, removed 13 redundant places. [2022-12-13 12:53:53,424 INFO L231 Difference]: Finished difference. Result has 188 places, 113 transitions, 1268 flow [2022-12-13 12:53:53,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1268, PETRI_PLACES=188, PETRI_TRANSITIONS=113} [2022-12-13 12:53:53,424 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 151 predicate places. [2022-12-13 12:53:53,424 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 113 transitions, 1268 flow [2022-12-13 12:53:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 87.13888888888889) internal successors, (3137), 36 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:53,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:53,425 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2022-12-13 12:53:53,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 12:53:53,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 12:53:53,626 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:53,627 INFO L85 PathProgramCache]: Analyzing trace with hash 344999443, now seen corresponding path program 4 times [2022-12-13 12:53:53,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:53,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035171951] [2022-12-13 12:53:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:53,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:53,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:53,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035171951] [2022-12-13 12:53:53,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035171951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:53,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530532033] [2022-12-13 12:53:53,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:53:53,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:53,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:53,972 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:53,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 12:53:54,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:53:54,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:54,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 12:53:54,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:54,194 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 13 treesize of output 9 [2022-12-13 12:53:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:54,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:53:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:54,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:54,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:54,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 12:53:54,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:53:54,475 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 43 treesize of output 39 [2022-12-13 12:53:54,484 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 9 treesize of output 5 [2022-12-13 12:53:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:54,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530532033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:54,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:54,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-12-13 12:53:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741310664] [2022-12-13 12:53:54,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:54,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 12:53:54,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 12:53:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1146, Unknown=3, NotChecked=0, Total=1260 [2022-12-13 12:53:55,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 260 [2022-12-13 12:53:55,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 113 transitions, 1268 flow. Second operand has 36 states, 36 states have (on average 92.11111111111111) internal successors, (3316), 36 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:55,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:55,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 260 [2022-12-13 12:53:55,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:56,792 INFO L130 PetriNetUnfolder]: 3632/7029 cut-off events. [2022-12-13 12:53:56,792 INFO L131 PetriNetUnfolder]: For 45559/46662 co-relation queries the response was YES. [2022-12-13 12:53:56,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42448 conditions, 7029 events. 3632/7029 cut-off events. For 45559/46662 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 55571 event pairs, 2535 based on Foata normal form. 1101/8125 useless extension candidates. Maximal degree in co-relation 42409. Up to 3566 conditions per place. [2022-12-13 12:53:56,833 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 128 selfloop transitions, 37 changer transitions 0/167 dead transitions. [2022-12-13 12:53:56,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 167 transitions, 2109 flow [2022-12-13 12:53:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:53:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 12:53:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1718 transitions. [2022-12-13 12:53:56,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36709401709401707 [2022-12-13 12:53:56,835 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1718 transitions. [2022-12-13 12:53:56,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1718 transitions. [2022-12-13 12:53:56,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:56,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1718 transitions. [2022-12-13 12:53:56,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 95.44444444444444) internal successors, (1718), 18 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:56,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:56,839 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:56,839 INFO L175 Difference]: Start difference. First operand has 188 places, 113 transitions, 1268 flow. Second operand 18 states and 1718 transitions. [2022-12-13 12:53:56,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 167 transitions, 2109 flow [2022-12-13 12:53:56,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 167 transitions, 2031 flow, removed 2 selfloop flow, removed 12 redundant places. [2022-12-13 12:53:56,899 INFO L231 Difference]: Finished difference. Result has 197 places, 120 transitions, 1374 flow [2022-12-13 12:53:56,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1374, PETRI_PLACES=197, PETRI_TRANSITIONS=120} [2022-12-13 12:53:56,899 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2022-12-13 12:53:56,899 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 120 transitions, 1374 flow [2022-12-13 12:53:56,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 92.11111111111111) internal successors, (3316), 36 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:56,900 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:56,900 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:56,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 12:53:57,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:57,101 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:57,102 INFO L85 PathProgramCache]: Analyzing trace with hash -198402174, now seen corresponding path program 5 times [2022-12-13 12:53:57,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:57,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28046947] [2022-12-13 12:53:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:57,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:57,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:57,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28046947] [2022-12-13 12:53:57,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28046947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:57,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477044158] [2022-12-13 12:53:57,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:53:57,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:57,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:57,282 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:57,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 12:53:57,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 12:53:57,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:57,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:53:57,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:57,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:53:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:57,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477044158] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:53:57,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:53:57,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-12-13 12:53:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617196112] [2022-12-13 12:53:57,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:53:57,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 12:53:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:53:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 12:53:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-12-13 12:53:57,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:53:57,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 120 transitions, 1374 flow. Second operand has 29 states, 29 states have (on average 104.20689655172414) internal successors, (3022), 29 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:57,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:53:57,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:53:57,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:53:59,010 INFO L130 PetriNetUnfolder]: 2613/5119 cut-off events. [2022-12-13 12:53:59,010 INFO L131 PetriNetUnfolder]: For 27454/28396 co-relation queries the response was YES. [2022-12-13 12:53:59,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30733 conditions, 5119 events. 2613/5119 cut-off events. For 27454/28396 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 38579 event pairs, 1403 based on Foata normal form. 1033/6150 useless extension candidates. Maximal degree in co-relation 30691. Up to 2070 conditions per place. [2022-12-13 12:53:59,038 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 165 selfloop transitions, 34 changer transitions 44/245 dead transitions. [2022-12-13 12:53:59,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 245 transitions, 2705 flow [2022-12-13 12:53:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:53:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 12:53:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1981 transitions. [2022-12-13 12:53:59,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4232905982905983 [2022-12-13 12:53:59,041 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1981 transitions. [2022-12-13 12:53:59,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1981 transitions. [2022-12-13 12:53:59,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:53:59,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1981 transitions. [2022-12-13 12:53:59,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.05555555555556) internal successors, (1981), 18 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:59,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:59,045 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:59,045 INFO L175 Difference]: Start difference. First operand has 197 places, 120 transitions, 1374 flow. Second operand 18 states and 1981 transitions. [2022-12-13 12:53:59,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 245 transitions, 2705 flow [2022-12-13 12:53:59,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 245 transitions, 2605 flow, removed 8 selfloop flow, removed 14 redundant places. [2022-12-13 12:53:59,091 INFO L231 Difference]: Finished difference. Result has 201 places, 115 transitions, 1281 flow [2022-12-13 12:53:59,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1281, PETRI_PLACES=201, PETRI_TRANSITIONS=115} [2022-12-13 12:53:59,092 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 164 predicate places. [2022-12-13 12:53:59,092 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 115 transitions, 1281 flow [2022-12-13 12:53:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 104.20689655172414) internal successors, (3022), 29 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:53:59,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:53:59,093 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:53:59,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 12:53:59,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-13 12:53:59,293 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:53:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:53:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1114849363, now seen corresponding path program 6 times [2022-12-13 12:53:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:53:59,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543081427] [2022-12-13 12:53:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:53:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:53:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:53:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:53:59,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:53:59,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543081427] [2022-12-13 12:53:59,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543081427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:53:59,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996571365] [2022-12-13 12:53:59,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:53:59,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:53:59,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:53:59,651 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:53:59,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 12:53:59,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 12:53:59,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:53:59,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 12:53:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:53:59,939 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 13 treesize of output 9 [2022-12-13 12:53:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:53:59,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:54:00,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:00,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:54:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:00,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:00,283 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1395 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1395) c_~A~0.base) (+ c_~A~0.offset 12)) 4294967296))) is different from false [2022-12-13 12:54:00,290 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1395 (Array Int Int)) (v_ArrVal_1394 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1394) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1395) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2022-12-13 12:54:00,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:00,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:54:00,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:00,307 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 81 treesize of output 77 [2022-12-13 12:54:00,312 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 32 treesize of output 28 [2022-12-13 12:54:00,315 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 58 treesize of output 50 [2022-12-13 12:54:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-12-13 12:54:00,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996571365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:00,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:00,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 12:54:00,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495520112] [2022-12-13 12:54:00,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:00,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 12:54:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:00,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 12:54:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=959, Unknown=2, NotChecked=126, Total=1190 [2022-12-13 12:54:00,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:54:00,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 115 transitions, 1281 flow. Second operand has 35 states, 35 states have (on average 87.2) internal successors, (3052), 35 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:00,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:00,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:54:00,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:02,776 INFO L130 PetriNetUnfolder]: 3167/6174 cut-off events. [2022-12-13 12:54:02,776 INFO L131 PetriNetUnfolder]: For 31929/32078 co-relation queries the response was YES. [2022-12-13 12:54:02,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36244 conditions, 6174 events. 3167/6174 cut-off events. For 31929/32078 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 47186 event pairs, 719 based on Foata normal form. 535/6705 useless extension candidates. Maximal degree in co-relation 36202. Up to 1921 conditions per place. [2022-12-13 12:54:02,806 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 256 selfloop transitions, 20 changer transitions 0/280 dead transitions. [2022-12-13 12:54:02,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 280 transitions, 3938 flow [2022-12-13 12:54:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:54:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:54:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1287 transitions. [2022-12-13 12:54:02,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3535714285714286 [2022-12-13 12:54:02,808 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1287 transitions. [2022-12-13 12:54:02,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1287 transitions. [2022-12-13 12:54:02,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:02,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1287 transitions. [2022-12-13 12:54:02,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 91.92857142857143) internal successors, (1287), 14 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:02,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:02,811 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:02,811 INFO L175 Difference]: Start difference. First operand has 201 places, 115 transitions, 1281 flow. Second operand 14 states and 1287 transitions. [2022-12-13 12:54:02,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 280 transitions, 3938 flow [2022-12-13 12:54:02,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 280 transitions, 3761 flow, removed 34 selfloop flow, removed 12 redundant places. [2022-12-13 12:54:02,876 INFO L231 Difference]: Finished difference. Result has 203 places, 117 transitions, 1278 flow [2022-12-13 12:54:02,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1278, PETRI_PLACES=203, PETRI_TRANSITIONS=117} [2022-12-13 12:54:02,876 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 166 predicate places. [2022-12-13 12:54:02,876 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 117 transitions, 1278 flow [2022-12-13 12:54:02,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 87.2) internal successors, (3052), 35 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:02,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:02,877 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2022-12-13 12:54:02,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 12:54:03,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:03,078 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash 344999444, now seen corresponding path program 5 times [2022-12-13 12:54:03,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:03,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132711501] [2022-12-13 12:54:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:03,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:03,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:03,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132711501] [2022-12-13 12:54:03,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132711501] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:03,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32569242] [2022-12-13 12:54:03,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:54:03,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:03,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:03,452 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:03,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 12:54:03,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 12:54:03,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:03,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 12:54:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:03,725 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 13 treesize of output 9 [2022-12-13 12:54:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:03,754 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 [2022-12-13 12:54:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:03,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:03,972 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1440 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1440) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:54:03,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:03,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-12-13 12:54:03,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:03,983 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 37 treesize of output 33 [2022-12-13 12:54:03,992 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 7 treesize of output 3 [2022-12-13 12:54:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-13 12:54:04,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32569242] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:04,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:04,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-12-13 12:54:04,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350296619] [2022-12-13 12:54:04,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:04,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 12:54:04,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:04,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 12:54:04,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1084, Unknown=1, NotChecked=66, Total=1260 [2022-12-13 12:54:04,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 12:54:04,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 117 transitions, 1278 flow. Second operand has 36 states, 36 states have (on average 90.11111111111111) internal successors, (3244), 36 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:04,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:04,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 12:54:04,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:05,763 INFO L130 PetriNetUnfolder]: 2979/5814 cut-off events. [2022-12-13 12:54:05,763 INFO L131 PetriNetUnfolder]: For 36190/36930 co-relation queries the response was YES. [2022-12-13 12:54:05,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36888 conditions, 5814 events. 2979/5814 cut-off events. For 36190/36930 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 43582 event pairs, 2184 based on Foata normal form. 738/6487 useless extension candidates. Maximal degree in co-relation 36846. Up to 4461 conditions per place. [2022-12-13 12:54:05,792 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 111 selfloop transitions, 32 changer transitions 0/145 dead transitions. [2022-12-13 12:54:05,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 145 transitions, 1828 flow [2022-12-13 12:54:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 12:54:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 12:54:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1581 transitions. [2022-12-13 12:54:05,794 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3576923076923077 [2022-12-13 12:54:05,794 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1581 transitions. [2022-12-13 12:54:05,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1581 transitions. [2022-12-13 12:54:05,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:05,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1581 transitions. [2022-12-13 12:54:05,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 93.0) internal successors, (1581), 17 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:05,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 260.0) internal successors, (4680), 18 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:05,798 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 260.0) internal successors, (4680), 18 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:05,798 INFO L175 Difference]: Start difference. First operand has 203 places, 117 transitions, 1278 flow. Second operand 17 states and 1581 transitions. [2022-12-13 12:54:05,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 145 transitions, 1828 flow [2022-12-13 12:54:05,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 145 transitions, 1771 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-12-13 12:54:05,844 INFO L231 Difference]: Finished difference. Result has 208 places, 115 transitions, 1269 flow [2022-12-13 12:54:05,845 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1269, PETRI_PLACES=208, PETRI_TRANSITIONS=115} [2022-12-13 12:54:05,845 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 171 predicate places. [2022-12-13 12:54:05,845 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 115 transitions, 1269 flow [2022-12-13 12:54:05,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 90.11111111111111) internal successors, (3244), 36 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:05,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:05,845 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:05,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 12:54:06,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:06,047 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:06,048 INFO L85 PathProgramCache]: Analyzing trace with hash 200595848, now seen corresponding path program 7 times [2022-12-13 12:54:06,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:06,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108974798] [2022-12-13 12:54:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:06,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:06,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:06,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108974798] [2022-12-13 12:54:06,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108974798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:06,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229236930] [2022-12-13 12:54:06,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:54:06,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:06,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:06,216 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:06,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 12:54:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:06,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:54:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:06,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:06,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229236930] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:06,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:06,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-12-13 12:54:06,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767696244] [2022-12-13 12:54:06,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:06,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 12:54:06,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 12:54:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-12-13 12:54:06,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:54:06,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 115 transitions, 1269 flow. Second operand has 29 states, 29 states have (on average 104.20689655172414) internal successors, (3022), 29 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:06,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:06,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:54:06,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:08,156 INFO L130 PetriNetUnfolder]: 3064/6017 cut-off events. [2022-12-13 12:54:08,156 INFO L131 PetriNetUnfolder]: For 28357/28365 co-relation queries the response was YES. [2022-12-13 12:54:08,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36972 conditions, 6017 events. 3064/6017 cut-off events. For 28357/28365 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 45303 event pairs, 1657 based on Foata normal form. 108/6125 useless extension candidates. Maximal degree in co-relation 36931. Up to 3655 conditions per place. [2022-12-13 12:54:08,186 INFO L137 encePairwiseOnDemand]: 253/260 looper letters, 80 selfloop transitions, 10 changer transitions 109/201 dead transitions. [2022-12-13 12:54:08,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 201 transitions, 2465 flow [2022-12-13 12:54:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:54:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:54:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1516 transitions. [2022-12-13 12:54:08,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4164835164835165 [2022-12-13 12:54:08,188 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1516 transitions. [2022-12-13 12:54:08,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1516 transitions. [2022-12-13 12:54:08,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:08,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1516 transitions. [2022-12-13 12:54:08,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 108.28571428571429) internal successors, (1516), 14 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:08,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:08,191 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:08,191 INFO L175 Difference]: Start difference. First operand has 208 places, 115 transitions, 1269 flow. Second operand 14 states and 1516 transitions. [2022-12-13 12:54:08,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 201 transitions, 2465 flow [2022-12-13 12:54:08,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 201 transitions, 2414 flow, removed 4 selfloop flow, removed 14 redundant places. [2022-12-13 12:54:08,262 INFO L231 Difference]: Finished difference. Result has 209 places, 76 transitions, 880 flow [2022-12-13 12:54:08,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=880, PETRI_PLACES=209, PETRI_TRANSITIONS=76} [2022-12-13 12:54:08,263 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 172 predicate places. [2022-12-13 12:54:08,263 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 76 transitions, 880 flow [2022-12-13 12:54:08,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 104.20689655172414) internal successors, (3022), 29 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:08,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:08,263 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:08,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-13 12:54:08,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 12:54:08,464 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2086581143, now seen corresponding path program 4 times [2022-12-13 12:54:08,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:08,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130864685] [2022-12-13 12:54:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:08,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:08,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:08,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130864685] [2022-12-13 12:54:08,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130864685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:08,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110661356] [2022-12-13 12:54:08,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:54:08,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:08,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:08,888 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:08,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 12:54:09,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:54:09,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:09,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 12:54:09,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:09,199 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 13 treesize of output 9 [2022-12-13 12:54:09,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:09,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:54:09,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:09,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:54:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:09,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:09,584 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1532 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1532) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 16)) 9223372039002259456))) is different from false [2022-12-13 12:54:09,628 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1532 (Array Int Int)) (v_ArrVal_1531 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1531) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1532) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 12:54:09,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:09,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:54:09,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:09,644 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 159 treesize of output 149 [2022-12-13 12:54:09,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 118 [2022-12-13 12:54:09,655 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 63 treesize of output 55 [2022-12-13 12:54:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-12-13 12:54:09,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110661356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:09,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:09,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-13 12:54:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247905304] [2022-12-13 12:54:09,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 12:54:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:09,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 12:54:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1348, Unknown=14, NotChecked=150, Total=1640 [2022-12-13 12:54:09,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:54:09,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 76 transitions, 880 flow. Second operand has 41 states, 41 states have (on average 87.09756097560975) internal successors, (3571), 41 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:09,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:09,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:54:09,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:11,894 INFO L130 PetriNetUnfolder]: 2579/5036 cut-off events. [2022-12-13 12:54:11,895 INFO L131 PetriNetUnfolder]: For 31910/32634 co-relation queries the response was YES. [2022-12-13 12:54:11,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32823 conditions, 5036 events. 2579/5036 cut-off events. For 31910/32634 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37785 event pairs, 1642 based on Foata normal form. 753/5761 useless extension candidates. Maximal degree in co-relation 32780. Up to 2596 conditions per place. [2022-12-13 12:54:11,922 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 171 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2022-12-13 12:54:11,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 196 transitions, 2473 flow [2022-12-13 12:54:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:54:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 12:54:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1479 transitions. [2022-12-13 12:54:11,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35552884615384617 [2022-12-13 12:54:11,925 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1479 transitions. [2022-12-13 12:54:11,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1479 transitions. [2022-12-13 12:54:11,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:11,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1479 transitions. [2022-12-13 12:54:11,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 92.4375) internal successors, (1479), 16 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:11,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:11,928 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:11,928 INFO L175 Difference]: Start difference. First operand has 209 places, 76 transitions, 880 flow. Second operand 16 states and 1479 transitions. [2022-12-13 12:54:11,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 196 transitions, 2473 flow [2022-12-13 12:54:12,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 196 transitions, 2218 flow, removed 67 selfloop flow, removed 20 redundant places. [2022-12-13 12:54:12,025 INFO L231 Difference]: Finished difference. Result has 177 places, 77 transitions, 849 flow [2022-12-13 12:54:12,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=849, PETRI_PLACES=177, PETRI_TRANSITIONS=77} [2022-12-13 12:54:12,026 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 140 predicate places. [2022-12-13 12:54:12,026 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 77 transitions, 849 flow [2022-12-13 12:54:12,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 87.09756097560975) internal successors, (3571), 41 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:12,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:12,026 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:12,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 12:54:12,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 12:54:12,228 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:12,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2086581144, now seen corresponding path program 6 times [2022-12-13 12:54:12,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:12,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549292655] [2022-12-13 12:54:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:12,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:12,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:12,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549292655] [2022-12-13 12:54:12,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549292655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431491714] [2022-12-13 12:54:12,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:54:12,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:12,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:12,693 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:12,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 12:54:12,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 12:54:12,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 12:54:12,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:13,003 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 13 treesize of output 9 [2022-12-13 12:54:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:13,030 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 [2022-12-13 12:54:13,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:13,108 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 [2022-12-13 12:54:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:13,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:13,352 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1582 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1582) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 16)) 4294967296)) is different from false [2022-12-13 12:54:13,356 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1582 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1582) c_~A~0.base) (+ c_~A~0.offset 16)) 4294967296)) is different from false [2022-12-13 12:54:13,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:13,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:54:13,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:13,431 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 71 treesize of output 67 [2022-12-13 12:54:13,434 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 54 treesize of output 46 [2022-12-13 12:54:13,438 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 24 treesize of output 20 [2022-12-13 12:54:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-12-13 12:54:13,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431491714] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:13,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:13,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-13 12:54:13,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767009416] [2022-12-13 12:54:13,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:13,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 12:54:13,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 12:54:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1350, Unknown=16, NotChecked=150, Total=1640 [2022-12-13 12:54:13,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:54:13,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 77 transitions, 849 flow. Second operand has 41 states, 41 states have (on average 87.09756097560975) internal successors, (3571), 41 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:13,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:13,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:54:13,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:15,287 INFO L130 PetriNetUnfolder]: 2536/4961 cut-off events. [2022-12-13 12:54:15,287 INFO L131 PetriNetUnfolder]: For 23686/24408 co-relation queries the response was YES. [2022-12-13 12:54:15,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31577 conditions, 4961 events. 2536/4961 cut-off events. For 23686/24408 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 37325 event pairs, 1530 based on Foata normal form. 751/5684 useless extension candidates. Maximal degree in co-relation 31541. Up to 2596 conditions per place. [2022-12-13 12:54:15,314 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 170 selfloop transitions, 24 changer transitions 0/195 dead transitions. [2022-12-13 12:54:15,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 195 transitions, 2263 flow [2022-12-13 12:54:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:54:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 12:54:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1478 transitions. [2022-12-13 12:54:15,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35528846153846155 [2022-12-13 12:54:15,316 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1478 transitions. [2022-12-13 12:54:15,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1478 transitions. [2022-12-13 12:54:15,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:15,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1478 transitions. [2022-12-13 12:54:15,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 92.375) internal successors, (1478), 16 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:15,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:15,319 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:15,319 INFO L175 Difference]: Start difference. First operand has 177 places, 77 transitions, 849 flow. Second operand 16 states and 1478 transitions. [2022-12-13 12:54:15,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 195 transitions, 2263 flow [2022-12-13 12:54:15,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 195 transitions, 2204 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-12-13 12:54:15,358 INFO L231 Difference]: Finished difference. Result has 177 places, 76 transitions, 820 flow [2022-12-13 12:54:15,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=820, PETRI_PLACES=177, PETRI_TRANSITIONS=76} [2022-12-13 12:54:15,359 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 140 predicate places. [2022-12-13 12:54:15,359 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 76 transitions, 820 flow [2022-12-13 12:54:15,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 87.09756097560975) internal successors, (3571), 41 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:15,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:15,360 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:15,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 12:54:15,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 12:54:15,560 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash -876664816, now seen corresponding path program 3 times [2022-12-13 12:54:15,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:15,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262920605] [2022-12-13 12:54:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:15,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:15,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:15,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262920605] [2022-12-13 12:54:15,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262920605] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:15,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226806101] [2022-12-13 12:54:15,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:54:15,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:15,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:15,947 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:15,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 12:54:16,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 12:54:16,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:16,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 12:54:16,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:16,280 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 13 treesize of output 9 [2022-12-13 12:54:16,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:16,313 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 [2022-12-13 12:54:16,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:16,346 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 [2022-12-13 12:54:16,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:16,373 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 [2022-12-13 12:54:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:16,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:16,529 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1634 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1634) c_~A~0.base) (+ c_~A~0.offset 12)) 9223372039002259456)) is different from false [2022-12-13 12:54:16,653 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:54:16,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-12-13 12:54:16,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:16,659 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 71 treesize of output 67 [2022-12-13 12:54:16,662 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 54 treesize of output 46 [2022-12-13 12:54:16,665 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 24 treesize of output 20 [2022-12-13 12:54:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:16,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226806101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:16,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:16,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-12-13 12:54:16,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820648134] [2022-12-13 12:54:16,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:16,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 12:54:16,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:16,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 12:54:16,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1069, Unknown=8, NotChecked=66, Total=1260 [2022-12-13 12:54:16,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:54:16,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 76 transitions, 820 flow. Second operand has 36 states, 36 states have (on average 87.19444444444444) internal successors, (3139), 36 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:16,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:16,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:54:16,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:18,227 INFO L130 PetriNetUnfolder]: 2495/4868 cut-off events. [2022-12-13 12:54:18,227 INFO L131 PetriNetUnfolder]: For 25095/25213 co-relation queries the response was YES. [2022-12-13 12:54:18,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30664 conditions, 4868 events. 2495/4868 cut-off events. For 25095/25213 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 36313 event pairs, 574 based on Foata normal form. 280/5146 useless extension candidates. Maximal degree in co-relation 30630. Up to 1507 conditions per place. [2022-12-13 12:54:18,253 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 186 selfloop transitions, 14 changer transitions 0/202 dead transitions. [2022-12-13 12:54:18,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 202 transitions, 2860 flow [2022-12-13 12:54:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:54:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:54:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1285 transitions. [2022-12-13 12:54:18,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35302197802197804 [2022-12-13 12:54:18,255 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1285 transitions. [2022-12-13 12:54:18,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1285 transitions. [2022-12-13 12:54:18,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:18,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1285 transitions. [2022-12-13 12:54:18,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 91.78571428571429) internal successors, (1285), 14 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:18,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:18,258 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:18,258 INFO L175 Difference]: Start difference. First operand has 177 places, 76 transitions, 820 flow. Second operand 14 states and 1285 transitions. [2022-12-13 12:54:18,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 202 transitions, 2860 flow [2022-12-13 12:54:18,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 202 transitions, 2702 flow, removed 8 selfloop flow, removed 16 redundant places. [2022-12-13 12:54:18,298 INFO L231 Difference]: Finished difference. Result has 174 places, 75 transitions, 776 flow [2022-12-13 12:54:18,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=776, PETRI_PLACES=174, PETRI_TRANSITIONS=75} [2022-12-13 12:54:18,298 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 137 predicate places. [2022-12-13 12:54:18,298 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 75 transitions, 776 flow [2022-12-13 12:54:18,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 87.19444444444444) internal successors, (3139), 36 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:18,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:18,299 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-12-13 12:54:18,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 12:54:18,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 12:54:18,499 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2105051564, now seen corresponding path program 6 times [2022-12-13 12:54:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:18,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075537481] [2022-12-13 12:54:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:18,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:18,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075537481] [2022-12-13 12:54:18,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075537481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:18,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665425388] [2022-12-13 12:54:18,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:54:18,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:18,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:18,656 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:18,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 12:54:18,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 12:54:18,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:18,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 12:54:18,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:19,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:19,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665425388] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:19,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:19,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-12-13 12:54:19,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532765023] [2022-12-13 12:54:19,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:19,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 12:54:19,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 12:54:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 12:54:19,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:54:19,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 75 transitions, 776 flow. Second operand has 34 states, 34 states have (on average 104.11764705882354) internal successors, (3540), 34 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:19,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:19,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:54:19,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:20,939 INFO L130 PetriNetUnfolder]: 3189/6237 cut-off events. [2022-12-13 12:54:20,939 INFO L131 PetriNetUnfolder]: For 30125/31036 co-relation queries the response was YES. [2022-12-13 12:54:20,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38145 conditions, 6237 events. 3189/6237 cut-off events. For 30125/31036 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 48652 event pairs, 1625 based on Foata normal form. 1051/7286 useless extension candidates. Maximal degree in co-relation 38113. Up to 2343 conditions per place. [2022-12-13 12:54:20,970 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 207 selfloop transitions, 39 changer transitions 52/299 dead transitions. [2022-12-13 12:54:20,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 299 transitions, 3314 flow [2022-12-13 12:54:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 12:54:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 12:54:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2322 transitions. [2022-12-13 12:54:20,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42527472527472526 [2022-12-13 12:54:20,973 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2322 transitions. [2022-12-13 12:54:20,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2322 transitions. [2022-12-13 12:54:20,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:20,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2322 transitions. [2022-12-13 12:54:20,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 110.57142857142857) internal successors, (2322), 21 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:20,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 260.0) internal successors, (5720), 22 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:20,978 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 260.0) internal successors, (5720), 22 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:20,978 INFO L175 Difference]: Start difference. First operand has 174 places, 75 transitions, 776 flow. Second operand 21 states and 2322 transitions. [2022-12-13 12:54:20,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 299 transitions, 3314 flow [2022-12-13 12:54:21,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 299 transitions, 3199 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-12-13 12:54:21,019 INFO L231 Difference]: Finished difference. Result has 197 places, 102 transitions, 1248 flow [2022-12-13 12:54:21,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1248, PETRI_PLACES=197, PETRI_TRANSITIONS=102} [2022-12-13 12:54:21,019 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2022-12-13 12:54:21,019 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 102 transitions, 1248 flow [2022-12-13 12:54:21,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 104.11764705882354) internal successors, (3540), 34 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:21,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:21,020 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2022-12-13 12:54:21,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 12:54:21,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 12:54:21,221 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash 497654189, now seen corresponding path program 5 times [2022-12-13 12:54:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:21,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698190189] [2022-12-13 12:54:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:21,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:21,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:21,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698190189] [2022-12-13 12:54:21,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698190189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:21,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454430613] [2022-12-13 12:54:21,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:54:21,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:21,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:21,694 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:21,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 12:54:21,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 12:54:21,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:21,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 12:54:21,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:22,040 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 13 treesize of output 9 [2022-12-13 12:54:22,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:22,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:54:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:22,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:22,340 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1725 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1725) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 12:54:22,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:22,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 12:54:22,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:22,352 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 43 treesize of output 39 [2022-12-13 12:54:22,355 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 9 treesize of output 5 [2022-12-13 12:54:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 12:54:22,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454430613] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:22,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:22,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2022-12-13 12:54:22,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485819080] [2022-12-13 12:54:22,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:22,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 12:54:22,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 12:54:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1514, Unknown=1, NotChecked=78, Total=1722 [2022-12-13 12:54:22,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 12:54:22,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 102 transitions, 1248 flow. Second operand has 42 states, 42 states have (on average 90.0952380952381) internal successors, (3784), 42 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:22,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:22,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 12:54:22,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:24,268 INFO L130 PetriNetUnfolder]: 3175/6198 cut-off events. [2022-12-13 12:54:24,268 INFO L131 PetriNetUnfolder]: For 51304/52119 co-relation queries the response was YES. [2022-12-13 12:54:24,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40609 conditions, 6198 events. 3175/6198 cut-off events. For 51304/52119 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 47348 event pairs, 2419 based on Foata normal form. 816/6996 useless extension candidates. Maximal degree in co-relation 40564. Up to 4043 conditions per place. [2022-12-13 12:54:24,296 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 116 selfloop transitions, 37 changer transitions 4/158 dead transitions. [2022-12-13 12:54:24,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 158 transitions, 2080 flow [2022-12-13 12:54:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:54:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 12:54:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1766 transitions. [2022-12-13 12:54:24,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35748987854251013 [2022-12-13 12:54:24,299 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1766 transitions. [2022-12-13 12:54:24,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1766 transitions. [2022-12-13 12:54:24,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:24,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1766 transitions. [2022-12-13 12:54:24,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 92.94736842105263) internal successors, (1766), 19 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:24,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 260.0) internal successors, (5200), 20 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:24,302 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 260.0) internal successors, (5200), 20 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:24,302 INFO L175 Difference]: Start difference. First operand has 197 places, 102 transitions, 1248 flow. Second operand 19 states and 1766 transitions. [2022-12-13 12:54:24,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 158 transitions, 2080 flow [2022-12-13 12:54:24,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 158 transitions, 2034 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-12-13 12:54:24,366 INFO L231 Difference]: Finished difference. Result has 216 places, 119 transitions, 1492 flow [2022-12-13 12:54:24,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1492, PETRI_PLACES=216, PETRI_TRANSITIONS=119} [2022-12-13 12:54:24,367 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 179 predicate places. [2022-12-13 12:54:24,367 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 119 transitions, 1492 flow [2022-12-13 12:54:24,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 90.0952380952381) internal successors, (3784), 42 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:24,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:24,367 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2022-12-13 12:54:24,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-13 12:54:24,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 12:54:24,569 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash 497654190, now seen corresponding path program 7 times [2022-12-13 12:54:24,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:24,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168680907] [2022-12-13 12:54:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:24,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:25,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:25,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168680907] [2022-12-13 12:54:25,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168680907] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:25,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818616] [2022-12-13 12:54:25,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:54:25,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:25,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:25,027 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:25,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 12:54:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 12:54:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:25,336 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 13 treesize of output 9 [2022-12-13 12:54:25,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:25,363 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 [2022-12-13 12:54:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:25,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:25,681 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1774 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1774) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:54:25,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:25,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-12-13 12:54:25,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:25,692 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 37 treesize of output 33 [2022-12-13 12:54:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 12:54:25,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:25,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:25,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2022-12-13 12:54:25,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446182652] [2022-12-13 12:54:25,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:25,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 12:54:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 12:54:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1681, Unknown=1, NotChecked=82, Total=1892 [2022-12-13 12:54:25,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 12:54:25,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 119 transitions, 1492 flow. Second operand has 44 states, 44 states have (on average 90.0909090909091) internal successors, (3964), 44 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:25,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:25,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 12:54:25,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:28,043 INFO L130 PetriNetUnfolder]: 3161/6155 cut-off events. [2022-12-13 12:54:28,043 INFO L131 PetriNetUnfolder]: For 48789/49593 co-relation queries the response was YES. [2022-12-13 12:54:28,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40267 conditions, 6155 events. 3161/6155 cut-off events. For 48789/49593 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 46737 event pairs, 2433 based on Foata normal form. 801/6933 useless extension candidates. Maximal degree in co-relation 40215. Up to 4002 conditions per place. [2022-12-13 12:54:28,078 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 115 selfloop transitions, 36 changer transitions 4/156 dead transitions. [2022-12-13 12:54:28,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 156 transitions, 2135 flow [2022-12-13 12:54:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:54:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 12:54:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1765 transitions. [2022-12-13 12:54:28,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35728744939271256 [2022-12-13 12:54:28,080 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1765 transitions. [2022-12-13 12:54:28,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1765 transitions. [2022-12-13 12:54:28,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:28,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1765 transitions. [2022-12-13 12:54:28,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 92.89473684210526) internal successors, (1765), 19 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:28,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 260.0) internal successors, (5200), 20 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:28,084 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 260.0) internal successors, (5200), 20 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:28,084 INFO L175 Difference]: Start difference. First operand has 216 places, 119 transitions, 1492 flow. Second operand 19 states and 1765 transitions. [2022-12-13 12:54:28,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 156 transitions, 2135 flow [2022-12-13 12:54:28,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 156 transitions, 2088 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-12-13 12:54:28,142 INFO L231 Difference]: Finished difference. Result has 225 places, 117 transitions, 1485 flow [2022-12-13 12:54:28,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1485, PETRI_PLACES=225, PETRI_TRANSITIONS=117} [2022-12-13 12:54:28,142 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 188 predicate places. [2022-12-13 12:54:28,143 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 117 transitions, 1485 flow [2022-12-13 12:54:28,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 90.0909090909091) internal successors, (3964), 44 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:28,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:28,143 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:28,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-13 12:54:28,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-12-13 12:54:28,344 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:28,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1406801526, now seen corresponding path program 8 times [2022-12-13 12:54:28,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:28,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629979146] [2022-12-13 12:54:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:28,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:28,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:28,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629979146] [2022-12-13 12:54:28,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629979146] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:28,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774841180] [2022-12-13 12:54:28,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:54:28,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:28,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:28,759 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:28,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 12:54:28,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:54:28,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 12:54:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:29,083 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 13 treesize of output 9 [2022-12-13 12:54:29,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:29,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:54:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:29,146 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 18 treesize of output 20 [2022-12-13 12:54:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:29,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:29,546 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1824 (Array Int Int)) (v_ArrVal_1823 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1823) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1824) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2022-12-13 12:54:29,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:29,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:54:29,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:29,559 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 81 treesize of output 77 [2022-12-13 12:54:29,562 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 32 treesize of output 28 [2022-12-13 12:54:29,564 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 58 treesize of output 50 [2022-12-13 12:54:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-13 12:54:29,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774841180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:29,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:29,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-13 12:54:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722312871] [2022-12-13 12:54:29,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:29,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 12:54:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 12:54:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1434, Unknown=7, NotChecked=76, Total=1640 [2022-12-13 12:54:29,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:54:29,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 117 transitions, 1485 flow. Second operand has 41 states, 41 states have (on average 87.17073170731707) internal successors, (3574), 41 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:29,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:29,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:54:29,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:32,502 INFO L130 PetriNetUnfolder]: 4044/7857 cut-off events. [2022-12-13 12:54:32,502 INFO L131 PetriNetUnfolder]: For 74442/74504 co-relation queries the response was YES. [2022-12-13 12:54:32,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50576 conditions, 7857 events. 4044/7857 cut-off events. For 74442/74504 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 62411 event pairs, 766 based on Foata normal form. 442/8299 useless extension candidates. Maximal degree in co-relation 50524. Up to 2071 conditions per place. [2022-12-13 12:54:32,543 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 313 selfloop transitions, 17 changer transitions 0/334 dead transitions. [2022-12-13 12:54:32,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 334 transitions, 5142 flow [2022-12-13 12:54:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:54:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 12:54:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1470 transitions. [2022-12-13 12:54:32,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35336538461538464 [2022-12-13 12:54:32,544 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1470 transitions. [2022-12-13 12:54:32,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1470 transitions. [2022-12-13 12:54:32,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:32,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1470 transitions. [2022-12-13 12:54:32,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 91.875) internal successors, (1470), 16 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:32,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:32,547 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:32,547 INFO L175 Difference]: Start difference. First operand has 225 places, 117 transitions, 1485 flow. Second operand 16 states and 1470 transitions. [2022-12-13 12:54:32,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 334 transitions, 5142 flow [2022-12-13 12:54:32,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 334 transitions, 5098 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-12-13 12:54:32,639 INFO L231 Difference]: Finished difference. Result has 227 places, 119 transitions, 1510 flow [2022-12-13 12:54:32,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1510, PETRI_PLACES=227, PETRI_TRANSITIONS=119} [2022-12-13 12:54:32,640 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 190 predicate places. [2022-12-13 12:54:32,640 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 119 transitions, 1510 flow [2022-12-13 12:54:32,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 87.17073170731707) internal successors, (3574), 41 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:32,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:32,640 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:32,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-13 12:54:32,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:32,841 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1406801527, now seen corresponding path program 4 times [2022-12-13 12:54:32,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:32,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511236260] [2022-12-13 12:54:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:32,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:33,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511236260] [2022-12-13 12:54:33,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511236260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:33,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452871266] [2022-12-13 12:54:33,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:54:33,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:33,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:33,461 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:33,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 12:54:33,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:54:33,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:33,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 12:54:33,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:33,777 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 13 treesize of output 9 [2022-12-13 12:54:33,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:33,812 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 [2022-12-13 12:54:33,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:33,843 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 [2022-12-13 12:54:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:33,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:34,089 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1874 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1874) c_~A~0.base) (+ c_~A~0.offset 16)) 9223372039002259456)) is different from false [2022-12-13 12:54:34,095 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1874 (Array Int Int)) (v_ArrVal_1873 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1873) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1874) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2022-12-13 12:54:34,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:34,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:54:34,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:34,107 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 71 treesize of output 67 [2022-12-13 12:54:34,110 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 54 treesize of output 46 [2022-12-13 12:54:34,113 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 24 treesize of output 20 [2022-12-13 12:54:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-13 12:54:34,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452871266] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:34,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:34,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-12-13 12:54:34,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988056184] [2022-12-13 12:54:34,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:34,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 12:54:34,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 12:54:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1223, Unknown=2, NotChecked=142, Total=1482 [2022-12-13 12:54:34,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 260 [2022-12-13 12:54:34,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 119 transitions, 1510 flow. Second operand has 39 states, 39 states have (on average 83.17948717948718) internal successors, (3244), 39 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:34,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:34,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 260 [2022-12-13 12:54:34,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:36,757 INFO L130 PetriNetUnfolder]: 3808/7401 cut-off events. [2022-12-13 12:54:36,757 INFO L131 PetriNetUnfolder]: For 65900/65956 co-relation queries the response was YES. [2022-12-13 12:54:36,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50675 conditions, 7401 events. 3808/7401 cut-off events. For 65900/65956 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 58225 event pairs, 768 based on Foata normal form. 276/7677 useless extension candidates. Maximal degree in co-relation 50620. Up to 2041 conditions per place. [2022-12-13 12:54:36,807 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 312 selfloop transitions, 17 changer transitions 0/333 dead transitions. [2022-12-13 12:54:36,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 333 transitions, 5133 flow [2022-12-13 12:54:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:54:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 12:54:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1404 transitions. [2022-12-13 12:54:36,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3375 [2022-12-13 12:54:36,809 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1404 transitions. [2022-12-13 12:54:36,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1404 transitions. [2022-12-13 12:54:36,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:36,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1404 transitions. [2022-12-13 12:54:36,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.75) internal successors, (1404), 16 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:36,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:36,812 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 260.0) internal successors, (4420), 17 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:36,812 INFO L175 Difference]: Start difference. First operand has 227 places, 119 transitions, 1510 flow. Second operand 16 states and 1404 transitions. [2022-12-13 12:54:36,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 333 transitions, 5133 flow [2022-12-13 12:54:36,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 333 transitions, 5089 flow, removed 4 selfloop flow, removed 13 redundant places. [2022-12-13 12:54:36,927 INFO L231 Difference]: Finished difference. Result has 229 places, 118 transitions, 1489 flow [2022-12-13 12:54:36,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1489, PETRI_PLACES=229, PETRI_TRANSITIONS=118} [2022-12-13 12:54:36,927 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 192 predicate places. [2022-12-13 12:54:36,927 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 118 transitions, 1489 flow [2022-12-13 12:54:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 83.17948717948718) internal successors, (3244), 39 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:36,927 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:36,927 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:36,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-13 12:54:37,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:37,128 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1972176958, now seen corresponding path program 7 times [2022-12-13 12:54:37,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:37,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267705577] [2022-12-13 12:54:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:37,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:37,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:37,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267705577] [2022-12-13 12:54:37,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267705577] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:37,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455411684] [2022-12-13 12:54:37,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:54:37,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:37,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:37,654 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:37,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 12:54:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:37,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 12:54:37,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:38,008 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 13 treesize of output 9 [2022-12-13 12:54:38,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:38,055 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 [2022-12-13 12:54:38,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:38,126 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 [2022-12-13 12:54:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:38,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:38,435 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1928 (Array Int Int)) (v_ArrVal_1927 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1927) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1928) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:54:38,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:38,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:54:38,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:38,450 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 71 treesize of output 67 [2022-12-13 12:54:38,453 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 54 treesize of output 46 [2022-12-13 12:54:38,457 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 24 treesize of output 20 [2022-12-13 12:54:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 12:54:38,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455411684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:38,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:38,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2022-12-13 12:54:38,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683693048] [2022-12-13 12:54:38,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:38,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 12:54:38,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:38,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 12:54:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1826, Unknown=19, NotChecked=86, Total=2070 [2022-12-13 12:54:38,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:54:38,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 118 transitions, 1489 flow. Second operand has 46 states, 46 states have (on average 87.1086956521739) internal successors, (4007), 46 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:38,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:38,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:54:38,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:41,563 INFO L130 PetriNetUnfolder]: 3597/7001 cut-off events. [2022-12-13 12:54:41,563 INFO L131 PetriNetUnfolder]: For 62337/63183 co-relation queries the response was YES. [2022-12-13 12:54:41,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47406 conditions, 7001 events. 3597/7001 cut-off events. For 62337/63183 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 54190 event pairs, 2385 based on Foata normal form. 874/7872 useless extension candidates. Maximal degree in co-relation 47352. Up to 2326 conditions per place. [2022-12-13 12:54:41,607 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 243 selfloop transitions, 27 changer transitions 4/275 dead transitions. [2022-12-13 12:54:41,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 275 transitions, 3728 flow [2022-12-13 12:54:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:54:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 12:54:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1678 transitions. [2022-12-13 12:54:41,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35854700854700855 [2022-12-13 12:54:41,609 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1678 transitions. [2022-12-13 12:54:41,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1678 transitions. [2022-12-13 12:54:41,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:41,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1678 transitions. [2022-12-13 12:54:41,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 93.22222222222223) internal successors, (1678), 18 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:41,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:41,613 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:41,613 INFO L175 Difference]: Start difference. First operand has 229 places, 118 transitions, 1489 flow. Second operand 18 states and 1678 transitions. [2022-12-13 12:54:41,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 275 transitions, 3728 flow [2022-12-13 12:54:41,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 275 transitions, 3587 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-12-13 12:54:41,705 INFO L231 Difference]: Finished difference. Result has 235 places, 119 transitions, 1552 flow [2022-12-13 12:54:41,705 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1552, PETRI_PLACES=235, PETRI_TRANSITIONS=119} [2022-12-13 12:54:41,705 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 198 predicate places. [2022-12-13 12:54:41,705 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 119 transitions, 1552 flow [2022-12-13 12:54:41,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 87.1086956521739) internal successors, (4007), 46 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:41,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:41,706 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:41,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-13 12:54:41,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-13 12:54:41,907 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:41,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:41,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1972176957, now seen corresponding path program 5 times [2022-12-13 12:54:41,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:41,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217357752] [2022-12-13 12:54:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:41,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:42,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:42,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217357752] [2022-12-13 12:54:42,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217357752] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:42,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956754014] [2022-12-13 12:54:42,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:54:42,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:42,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:42,457 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:42,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 12:54:42,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 12:54:42,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 12:54:42,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:42,860 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 13 treesize of output 9 [2022-12-13 12:54:42,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:42,906 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 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:54:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:42,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:54:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:43,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:43,287 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1982 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1982) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 20)) 9223372039002259456))) is different from false [2022-12-13 12:54:43,292 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1982 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1982) c_~A~0.base) (+ c_~A~0.offset 20)) 9223372039002259456))) is different from false [2022-12-13 12:54:43,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:43,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:54:43,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:43,372 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 81 treesize of output 77 [2022-12-13 12:54:43,375 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 62 treesize of output 54 [2022-12-13 12:54:43,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-13 12:54:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:43,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956754014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:43,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:43,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2022-12-13 12:54:43,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384512410] [2022-12-13 12:54:43,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:43,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 12:54:43,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 12:54:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1762, Unknown=3, NotChecked=170, Total=2070 [2022-12-13 12:54:43,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:54:43,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 119 transitions, 1552 flow. Second operand has 46 states, 46 states have (on average 87.1086956521739) internal successors, (4007), 46 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:43,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:43,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:54:43,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:46,222 INFO L130 PetriNetUnfolder]: 3551/6924 cut-off events. [2022-12-13 12:54:46,223 INFO L131 PetriNetUnfolder]: For 56788/57624 co-relation queries the response was YES. [2022-12-13 12:54:46,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46292 conditions, 6924 events. 3551/6924 cut-off events. For 56788/57624 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 53493 event pairs, 2385 based on Foata normal form. 864/7785 useless extension candidates. Maximal degree in co-relation 46236. Up to 2326 conditions per place. [2022-12-13 12:54:46,259 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 242 selfloop transitions, 27 changer transitions 4/274 dead transitions. [2022-12-13 12:54:46,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 274 transitions, 3630 flow [2022-12-13 12:54:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:54:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 12:54:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1677 transitions. [2022-12-13 12:54:46,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2022-12-13 12:54:46,261 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1677 transitions. [2022-12-13 12:54:46,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1677 transitions. [2022-12-13 12:54:46,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:46,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1677 transitions. [2022-12-13 12:54:46,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 93.16666666666667) internal successors, (1677), 18 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:46,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:46,264 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:46,264 INFO L175 Difference]: Start difference. First operand has 235 places, 119 transitions, 1552 flow. Second operand 18 states and 1677 transitions. [2022-12-13 12:54:46,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 274 transitions, 3630 flow [2022-12-13 12:54:46,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 274 transitions, 3552 flow, removed 2 selfloop flow, removed 15 redundant places. [2022-12-13 12:54:46,354 INFO L231 Difference]: Finished difference. Result has 237 places, 118 transitions, 1502 flow [2022-12-13 12:54:46,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1502, PETRI_PLACES=237, PETRI_TRANSITIONS=118} [2022-12-13 12:54:46,355 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 200 predicate places. [2022-12-13 12:54:46,355 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 118 transitions, 1502 flow [2022-12-13 12:54:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 87.1086956521739) internal successors, (4007), 46 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:46,355 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:46,355 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2022-12-13 12:54:46,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-13 12:54:46,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-13 12:54:46,556 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1752585902, now seen corresponding path program 8 times [2022-12-13 12:54:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:46,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597793681] [2022-12-13 12:54:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:46,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597793681] [2022-12-13 12:54:46,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597793681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660209212] [2022-12-13 12:54:46,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:54:46,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:46,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:46,796 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:46,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 12:54:46,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:54:46,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:47,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:54:47,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:47,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:47,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660209212] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:47,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:47,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-12-13 12:54:47,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739120596] [2022-12-13 12:54:47,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:47,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 12:54:47,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:47,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 12:54:47,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 12:54:47,668 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:54:47,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 118 transitions, 1502 flow. Second operand has 39 states, 39 states have (on average 104.1025641025641) internal successors, (4060), 39 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:47,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:47,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:54:47,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:50,242 INFO L130 PetriNetUnfolder]: 4672/9103 cut-off events. [2022-12-13 12:54:50,242 INFO L131 PetriNetUnfolder]: For 77472/78598 co-relation queries the response was YES. [2022-12-13 12:54:50,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58614 conditions, 9103 events. 4672/9103 cut-off events. For 77472/78598 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 74961 event pairs, 2112 based on Foata normal form. 1288/10391 useless extension candidates. Maximal degree in co-relation 58560. Up to 2695 conditions per place. [2022-12-13 12:54:50,299 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 404 selfloop transitions, 70 changer transitions 112/587 dead transitions. [2022-12-13 12:54:50,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 587 transitions, 6828 flow [2022-12-13 12:54:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 12:54:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 12:54:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4108 transitions. [2022-12-13 12:54:50,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42702702702702705 [2022-12-13 12:54:50,303 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4108 transitions. [2022-12-13 12:54:50,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4108 transitions. [2022-12-13 12:54:50,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:50,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4108 transitions. [2022-12-13 12:54:50,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 111.02702702702703) internal successors, (4108), 37 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:50,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 260.0) internal successors, (9880), 38 states have internal predecessors, (9880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:50,309 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 260.0) internal successors, (9880), 38 states have internal predecessors, (9880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:50,310 INFO L175 Difference]: Start difference. First operand has 237 places, 118 transitions, 1502 flow. Second operand 37 states and 4108 transitions. [2022-12-13 12:54:50,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 587 transitions, 6828 flow [2022-12-13 12:54:50,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 587 transitions, 6731 flow, removed 1 selfloop flow, removed 16 redundant places. [2022-12-13 12:54:50,482 INFO L231 Difference]: Finished difference. Result has 272 places, 149 transitions, 2135 flow [2022-12-13 12:54:50,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2135, PETRI_PLACES=272, PETRI_TRANSITIONS=149} [2022-12-13 12:54:50,482 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 235 predicate places. [2022-12-13 12:54:50,482 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 149 transitions, 2135 flow [2022-12-13 12:54:50,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 104.1025641025641) internal successors, (4060), 39 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:50,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:50,483 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:50,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-13 12:54:50,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-13 12:54:50,684 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:50,685 INFO L85 PathProgramCache]: Analyzing trace with hash -661170384, now seen corresponding path program 5 times [2022-12-13 12:54:50,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:50,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248552980] [2022-12-13 12:54:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:50,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:50,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:50,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248552980] [2022-12-13 12:54:50,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248552980] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:50,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225374229] [2022-12-13 12:54:50,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:54:50,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:50,848 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:50,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 12:54:51,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 12:54:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 12:54:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:51,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:51,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225374229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:51,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:51,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-12-13 12:54:51,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652599818] [2022-12-13 12:54:51,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:51,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 12:54:51,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:51,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 12:54:51,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 12:54:51,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:54:51,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 149 transitions, 2135 flow. Second operand has 34 states, 34 states have (on average 104.17647058823529) internal successors, (3542), 34 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:51,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:51,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:54:51,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:54:53,892 INFO L130 PetriNetUnfolder]: 4686/9208 cut-off events. [2022-12-13 12:54:53,892 INFO L131 PetriNetUnfolder]: For 114088/114227 co-relation queries the response was YES. [2022-12-13 12:54:53,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61754 conditions, 9208 events. 4686/9208 cut-off events. For 114088/114227 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 73587 event pairs, 2107 based on Foata normal form. 321/9525 useless extension candidates. Maximal degree in co-relation 61686. Up to 4750 conditions per place. [2022-12-13 12:54:53,951 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 112 selfloop transitions, 11 changer transitions 229/356 dead transitions. [2022-12-13 12:54:53,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 356 transitions, 5405 flow [2022-12-13 12:54:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 12:54:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 12:54:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2276 transitions. [2022-12-13 12:54:53,954 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41684981684981687 [2022-12-13 12:54:53,954 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2276 transitions. [2022-12-13 12:54:53,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2276 transitions. [2022-12-13 12:54:53,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:54:53,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2276 transitions. [2022-12-13 12:54:53,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 108.38095238095238) internal successors, (2276), 21 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:53,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 260.0) internal successors, (5720), 22 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:53,958 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 260.0) internal successors, (5720), 22 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:53,958 INFO L175 Difference]: Start difference. First operand has 272 places, 149 transitions, 2135 flow. Second operand 21 states and 2276 transitions. [2022-12-13 12:54:53,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 356 transitions, 5405 flow [2022-12-13 12:54:54,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 356 transitions, 5078 flow, removed 57 selfloop flow, removed 13 redundant places. [2022-12-13 12:54:54,194 INFO L231 Difference]: Finished difference. Result has 286 places, 111 transitions, 1602 flow [2022-12-13 12:54:54,194 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1602, PETRI_PLACES=286, PETRI_TRANSITIONS=111} [2022-12-13 12:54:54,194 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 249 predicate places. [2022-12-13 12:54:54,194 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 111 transitions, 1602 flow [2022-12-13 12:54:54,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 104.17647058823529) internal successors, (3542), 34 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:54,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:54:54,195 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:54:54,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-12-13 12:54:54,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:54,396 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:54:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:54:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash 818179762, now seen corresponding path program 6 times [2022-12-13 12:54:54,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:54:54,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125406969] [2022-12-13 12:54:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:54:54,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:54:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:54:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:55,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:54:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125406969] [2022-12-13 12:54:55,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125406969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:54:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594277141] [2022-12-13 12:54:55,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:54:55,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:54:55,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:54:55,090 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:54:55,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 12:54:55,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 12:54:55,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:54:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 12:54:55,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:54:55,569 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 13 treesize of output 9 [2022-12-13 12:54:55,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:55,605 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 [2022-12-13 12:54:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:54:55,641 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 [2022-12-13 12:54:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:55,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:54:56,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:56,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:54:56,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:54:56,062 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 71 treesize of output 67 [2022-12-13 12:54:56,065 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 28 treesize of output 24 [2022-12-13 12:54:56,068 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 50 treesize of output 42 [2022-12-13 12:54:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:54:56,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594277141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:54:56,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:54:56,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2022-12-13 12:54:56,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777207266] [2022-12-13 12:54:56,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:54:56,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 12:54:56,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:54:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 12:54:56,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1821, Unknown=22, NotChecked=0, Total=1980 [2022-12-13 12:54:57,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 260 [2022-12-13 12:54:57,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 111 transitions, 1602 flow. Second operand has 45 states, 45 states have (on average 83.15555555555555) internal successors, (3742), 45 states have internal predecessors, (3742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:54:57,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:54:57,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 260 [2022-12-13 12:54:57,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:55:00,430 INFO L130 PetriNetUnfolder]: 4601/8962 cut-off events. [2022-12-13 12:55:00,430 INFO L131 PetriNetUnfolder]: For 198769/198942 co-relation queries the response was YES. [2022-12-13 12:55:00,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66550 conditions, 8962 events. 4601/8962 cut-off events. For 198769/198942 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 72540 event pairs, 785 based on Foata normal form. 545/9503 useless extension candidates. Maximal degree in co-relation 66474. Up to 2434 conditions per place. [2022-12-13 12:55:00,499 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 352 selfloop transitions, 19 changer transitions 0/375 dead transitions. [2022-12-13 12:55:00,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 375 transitions, 6332 flow [2022-12-13 12:55:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:55:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 12:55:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1581 transitions. [2022-12-13 12:55:00,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33782051282051284 [2022-12-13 12:55:00,501 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1581 transitions. [2022-12-13 12:55:00,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1581 transitions. [2022-12-13 12:55:00,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:55:00,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1581 transitions. [2022-12-13 12:55:00,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.83333333333333) internal successors, (1581), 18 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:00,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:00,504 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:00,504 INFO L175 Difference]: Start difference. First operand has 286 places, 111 transitions, 1602 flow. Second operand 18 states and 1581 transitions. [2022-12-13 12:55:00,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 375 transitions, 6332 flow [2022-12-13 12:55:01,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 375 transitions, 5781 flow, removed 100 selfloop flow, removed 44 redundant places. [2022-12-13 12:55:01,380 INFO L231 Difference]: Finished difference. Result has 231 places, 113 transitions, 1428 flow [2022-12-13 12:55:01,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1428, PETRI_PLACES=231, PETRI_TRANSITIONS=113} [2022-12-13 12:55:01,381 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 194 predicate places. [2022-12-13 12:55:01,381 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 113 transitions, 1428 flow [2022-12-13 12:55:01,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 83.15555555555555) internal successors, (3742), 45 states have internal predecessors, (3742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:01,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:55:01,381 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2022-12-13 12:55:01,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-13 12:55:01,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 12:55:01,582 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:55:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:55:01,583 INFO L85 PathProgramCache]: Analyzing trace with hash -273235756, now seen corresponding path program 9 times [2022-12-13 12:55:01,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:55:01,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453544895] [2022-12-13 12:55:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:55:01,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:55:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:55:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:55:02,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:55:02,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453544895] [2022-12-13 12:55:02,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453544895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:55:02,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984007823] [2022-12-13 12:55:02,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:55:02,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:55:02,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:55:02,482 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:55:02,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 12:55:02,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 12:55:02,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:55:02,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 12:55:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:55:02,988 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 13 treesize of output 9 [2022-12-13 12:55:03,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:55:03,021 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 [2022-12-13 12:55:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:55:03,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:55:03,433 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2181 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2181) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:55:03,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:55:03,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-12-13 12:55:03,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:55:03,443 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 37 treesize of output 33 [2022-12-13 12:55:03,451 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 7 treesize of output 3 [2022-12-13 12:55:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-13 12:55:03,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984007823] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:55:03,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:55:03,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2022-12-13 12:55:03,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872666080] [2022-12-13 12:55:03,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:55:03,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 12:55:03,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:55:03,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 12:55:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2024, Unknown=1, NotChecked=90, Total=2256 [2022-12-13 12:55:03,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 260 [2022-12-13 12:55:03,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 113 transitions, 1428 flow. Second operand has 48 states, 48 states have (on average 86.08333333333333) internal successors, (4132), 48 states have internal predecessors, (4132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:03,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:55:03,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 260 [2022-12-13 12:55:03,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:55:07,359 INFO L130 PetriNetUnfolder]: 4462/8665 cut-off events. [2022-12-13 12:55:07,359 INFO L131 PetriNetUnfolder]: For 87596/88589 co-relation queries the response was YES. [2022-12-13 12:55:07,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63166 conditions, 8665 events. 4462/8665 cut-off events. For 87596/88589 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 68567 event pairs, 3519 based on Foata normal form. 991/9633 useless extension candidates. Maximal degree in co-relation 63115. Up to 5382 conditions per place. [2022-12-13 12:55:07,407 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 146 selfloop transitions, 73 changer transitions 4/224 dead transitions. [2022-12-13 12:55:07,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 224 transitions, 3120 flow [2022-12-13 12:55:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 12:55:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 12:55:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2834 transitions. [2022-12-13 12:55:07,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.340625 [2022-12-13 12:55:07,409 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2834 transitions. [2022-12-13 12:55:07,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2834 transitions. [2022-12-13 12:55:07,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:55:07,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2834 transitions. [2022-12-13 12:55:07,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 88.5625) internal successors, (2834), 32 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:07,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 260.0) internal successors, (8580), 33 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:07,415 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 260.0) internal successors, (8580), 33 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:07,415 INFO L175 Difference]: Start difference. First operand has 231 places, 113 transitions, 1428 flow. Second operand 32 states and 2834 transitions. [2022-12-13 12:55:07,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 224 transitions, 3120 flow [2022-12-13 12:55:07,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 224 transitions, 3071 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-12-13 12:55:07,534 INFO L231 Difference]: Finished difference. Result has 254 places, 164 transitions, 2130 flow [2022-12-13 12:55:07,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2130, PETRI_PLACES=254, PETRI_TRANSITIONS=164} [2022-12-13 12:55:07,534 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 217 predicate places. [2022-12-13 12:55:07,534 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 164 transitions, 2130 flow [2022-12-13 12:55:07,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 86.08333333333333) internal successors, (4132), 48 states have internal predecessors, (4132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:07,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:55:07,534 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2022-12-13 12:55:07,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-13 12:55:07,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 12:55:07,735 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:55:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:55:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash -273235757, now seen corresponding path program 6 times [2022-12-13 12:55:07,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:55:07,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7145992] [2022-12-13 12:55:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:55:07,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:55:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:55:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:55:08,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:55:08,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7145992] [2022-12-13 12:55:08,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7145992] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:55:08,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033310764] [2022-12-13 12:55:08,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:55:08,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:55:08,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:55:08,661 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:55:08,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 12:55:08,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 12:55:08,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:55:08,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 12:55:08,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:55:09,176 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 [2022-12-13 12:55:09,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:55:09,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 12:55:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:55:09,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:55:10,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:55:10,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 12:55:10,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:55:10,322 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 47 treesize of output 43 [2022-12-13 12:55:10,326 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 15 treesize of output 9 [2022-12-13 12:55:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:55:10,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033310764] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:55:10,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:55:10,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-12-13 12:55:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870693643] [2022-12-13 12:55:10,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:55:10,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 12:55:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:55:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 12:55:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2188, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 12:55:12,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:55:16,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:55:17,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 260 [2022-12-13 12:55:17,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 164 transitions, 2130 flow. Second operand has 50 states, 50 states have (on average 94.08) internal successors, (4704), 50 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:17,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:55:17,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 260 [2022-12-13 12:55:17,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:55:18,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:55:28,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:55:32,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:55:36,857 INFO L130 PetriNetUnfolder]: 7712/14050 cut-off events. [2022-12-13 12:55:36,857 INFO L131 PetriNetUnfolder]: For 156442/157992 co-relation queries the response was YES. [2022-12-13 12:55:36,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108504 conditions, 14050 events. 7712/14050 cut-off events. For 156442/157992 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 111893 event pairs, 3875 based on Foata normal form. 1706/15749 useless extension candidates. Maximal degree in co-relation 108448. Up to 4071 conditions per place. [2022-12-13 12:55:36,949 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 371 selfloop transitions, 164 changer transitions 36/572 dead transitions. [2022-12-13 12:55:36,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 572 transitions, 8017 flow [2022-12-13 12:55:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-13 12:55:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-13 12:55:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6349 transitions. [2022-12-13 12:55:36,954 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37568047337278104 [2022-12-13 12:55:36,954 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6349 transitions. [2022-12-13 12:55:36,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6349 transitions. [2022-12-13 12:55:36,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:55:36,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6349 transitions. [2022-12-13 12:55:36,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 97.67692307692307) internal successors, (6349), 65 states have internal predecessors, (6349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:36,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 260.0) internal successors, (17160), 66 states have internal predecessors, (17160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:36,967 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 260.0) internal successors, (17160), 66 states have internal predecessors, (17160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:36,967 INFO L175 Difference]: Start difference. First operand has 254 places, 164 transitions, 2130 flow. Second operand 65 states and 6349 transitions. [2022-12-13 12:55:36,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 572 transitions, 8017 flow [2022-12-13 12:55:37,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 572 transitions, 7924 flow, removed 36 selfloop flow, removed 8 redundant places. [2022-12-13 12:55:37,208 INFO L231 Difference]: Finished difference. Result has 331 places, 239 transitions, 3731 flow [2022-12-13 12:55:37,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3731, PETRI_PLACES=331, PETRI_TRANSITIONS=239} [2022-12-13 12:55:37,208 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 294 predicate places. [2022-12-13 12:55:37,208 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 239 transitions, 3731 flow [2022-12-13 12:55:37,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 94.08) internal successors, (4704), 50 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:37,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:55:37,209 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:55:37,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-12-13 12:55:37,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:55:37,410 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:55:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:55:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash 818179763, now seen corresponding path program 9 times [2022-12-13 12:55:37,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:55:37,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901101994] [2022-12-13 12:55:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:55:37,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:55:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:55:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:55:37,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:55:37,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901101994] [2022-12-13 12:55:37,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901101994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:55:37,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360425991] [2022-12-13 12:55:37,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:55:37,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:55:37,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:55:37,882 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:55:37,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-13 12:55:38,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 12:55:38,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:55:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 12:55:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:55:38,354 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 [2022-12-13 12:55:38,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:55:38,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 12:55:38,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:55:38,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 12:55:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:55:38,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:55:39,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:55:39,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-12-13 12:55:39,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:55:39,477 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 89 treesize of output 85 [2022-12-13 12:55:39,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-12-13 12:55:39,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-12-13 12:55:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:55:40,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360425991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:55:40,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:55:40,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-13 12:55:40,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863971548] [2022-12-13 12:55:40,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:55:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 12:55:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:55:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 12:55:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1939, Unknown=4, NotChecked=0, Total=2162 [2022-12-13 12:55:41,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:55:45,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:55:46,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 260 [2022-12-13 12:55:46,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 239 transitions, 3731 flow. Second operand has 47 states, 47 states have (on average 78.14893617021276) internal successors, (3673), 47 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:55:46,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:55:46,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 260 [2022-12-13 12:55:46,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:56:25,518 INFO L130 PetriNetUnfolder]: 9413/16881 cut-off events. [2022-12-13 12:56:25,519 INFO L131 PetriNetUnfolder]: For 204428/204788 co-relation queries the response was YES. [2022-12-13 12:56:25,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136154 conditions, 16881 events. 9413/16881 cut-off events. For 204428/204788 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 136895 event pairs, 524 based on Foata normal form. 1056/17933 useless extension candidates. Maximal degree in co-relation 136075. Up to 5088 conditions per place. [2022-12-13 12:56:25,664 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 1099 selfloop transitions, 53 changer transitions 243/1401 dead transitions. [2022-12-13 12:56:25,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1401 transitions, 25946 flow [2022-12-13 12:56:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 12:56:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-13 12:56:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4285 transitions. [2022-12-13 12:56:25,668 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32315233785822023 [2022-12-13 12:56:25,668 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4285 transitions. [2022-12-13 12:56:25,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4285 transitions. [2022-12-13 12:56:25,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:56:25,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4285 transitions. [2022-12-13 12:56:25,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 84.01960784313725) internal successors, (4285), 51 states have internal predecessors, (4285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:25,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 260.0) internal successors, (13520), 52 states have internal predecessors, (13520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:25,678 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 260.0) internal successors, (13520), 52 states have internal predecessors, (13520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:25,678 INFO L175 Difference]: Start difference. First operand has 331 places, 239 transitions, 3731 flow. Second operand 51 states and 4285 transitions. [2022-12-13 12:56:25,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1401 transitions, 25946 flow [2022-12-13 12:56:26,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1401 transitions, 25416 flow, removed 196 selfloop flow, removed 22 redundant places. [2022-12-13 12:56:26,176 INFO L231 Difference]: Finished difference. Result has 362 places, 267 transitions, 3888 flow [2022-12-13 12:56:26,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3888, PETRI_PLACES=362, PETRI_TRANSITIONS=267} [2022-12-13 12:56:26,176 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 325 predicate places. [2022-12-13 12:56:26,176 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 267 transitions, 3888 flow [2022-12-13 12:56:26,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 78.14893617021276) internal successors, (3673), 47 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:26,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:56:26,177 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 12:56:26,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-12-13 12:56:26,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-12-13 12:56:26,378 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:56:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:56:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1546998329, now seen corresponding path program 6 times [2022-12-13 12:56:26,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:56:26,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926221085] [2022-12-13 12:56:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:56:26,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:56:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:56:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:56:27,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:56:27,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926221085] [2022-12-13 12:56:27,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926221085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:56:27,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685573799] [2022-12-13 12:56:27,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:56:27,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:56:27,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:56:27,016 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:56:27,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-13 12:56:27,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 12:56:27,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:56:27,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-13 12:56:27,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:56:27,461 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 13 treesize of output 9 [2022-12-13 12:56:27,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:56:27,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:56:27,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:56:27,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:56:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:56:27,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:56:28,038 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2346 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2346) c_~A~0.base) (+ c_~A~0.offset 24)) 9223372039002259456))) is different from false [2022-12-13 12:56:28,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:56:28,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:56:28,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:56:28,106 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 81 treesize of output 77 [2022-12-13 12:56:28,108 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 62 treesize of output 54 [2022-12-13 12:56:28,111 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 28 treesize of output 24 [2022-12-13 12:56:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:56:28,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685573799] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:56:28,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:56:28,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2022-12-13 12:56:28,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86326521] [2022-12-13 12:56:28,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:56:28,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 12:56:28,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:56:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 12:56:28,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2285, Unknown=7, NotChecked=96, Total=2550 [2022-12-13 12:56:28,518 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:56:28,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 267 transitions, 3888 flow. Second operand has 51 states, 51 states have (on average 87.09803921568627) internal successors, (4442), 51 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:28,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:56:28,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:56:28,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:56:33,625 INFO L130 PetriNetUnfolder]: 8108/14579 cut-off events. [2022-12-13 12:56:33,625 INFO L131 PetriNetUnfolder]: For 227592/228837 co-relation queries the response was YES. [2022-12-13 12:56:33,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122141 conditions, 14579 events. 8108/14579 cut-off events. For 227592/228837 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 115208 event pairs, 3934 based on Foata normal form. 1342/15878 useless extension candidates. Maximal degree in co-relation 122060. Up to 5167 conditions per place. [2022-12-13 12:56:33,748 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 540 selfloop transitions, 60 changer transitions 0/603 dead transitions. [2022-12-13 12:56:33,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 603 transitions, 9439 flow [2022-12-13 12:56:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 12:56:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 12:56:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1861 transitions. [2022-12-13 12:56:33,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3578846153846154 [2022-12-13 12:56:33,750 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1861 transitions. [2022-12-13 12:56:33,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1861 transitions. [2022-12-13 12:56:33,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:56:33,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1861 transitions. [2022-12-13 12:56:33,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 93.05) internal successors, (1861), 20 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:33,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 260.0) internal successors, (5460), 21 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:33,754 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 260.0) internal successors, (5460), 21 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:33,754 INFO L175 Difference]: Start difference. First operand has 362 places, 267 transitions, 3888 flow. Second operand 20 states and 1861 transitions. [2022-12-13 12:56:33,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 603 transitions, 9439 flow [2022-12-13 12:56:34,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 603 transitions, 8786 flow, removed 128 selfloop flow, removed 21 redundant places. [2022-12-13 12:56:34,169 INFO L231 Difference]: Finished difference. Result has 357 places, 267 transitions, 3877 flow [2022-12-13 12:56:34,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3671, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3877, PETRI_PLACES=357, PETRI_TRANSITIONS=267} [2022-12-13 12:56:34,170 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 320 predicate places. [2022-12-13 12:56:34,170 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 267 transitions, 3877 flow [2022-12-13 12:56:34,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 87.09803921568627) internal successors, (4442), 51 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:34,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:56:34,170 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 12:56:34,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-13 12:56:34,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:56:34,371 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:56:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:56:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1546998330, now seen corresponding path program 8 times [2022-12-13 12:56:34,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:56:34,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086158479] [2022-12-13 12:56:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:56:34,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:56:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:56:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:56:34,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:56:34,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086158479] [2022-12-13 12:56:34,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086158479] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:56:34,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883160305] [2022-12-13 12:56:34,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:56:34,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:56:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:56:34,936 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:56:34,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-13 12:56:35,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:56:35,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:56:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:56:35,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:56:35,383 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 [2022-12-13 12:56:35,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:56:35,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:56:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:56:35,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:56:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:56:35,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:56:36,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:56:36,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:56:36,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:56:36,358 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 157 treesize of output 145 [2022-12-13 12:56:36,362 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 130 treesize of output 106 [2022-12-13 12:56:36,366 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 106 treesize of output 94 [2022-12-13 12:56:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:56:37,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883160305] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:56:37,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:56:37,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-13 12:56:37,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286921579] [2022-12-13 12:56:37,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:56:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 12:56:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:56:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 12:56:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2482, Unknown=2, NotChecked=0, Total=2756 [2022-12-13 12:56:38,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 260 [2022-12-13 12:56:38,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 267 transitions, 3877 flow. Second operand has 53 states, 53 states have (on average 78.0754716981132) internal successors, (4138), 53 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:56:38,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:56:38,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 260 [2022-12-13 12:56:38,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:56:39,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:57:14,719 INFO L130 PetriNetUnfolder]: 9347/17192 cut-off events. [2022-12-13 12:57:14,719 INFO L131 PetriNetUnfolder]: For 245389/247237 co-relation queries the response was YES. [2022-12-13 12:57:14,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129756 conditions, 17192 events. 9347/17192 cut-off events. For 245389/247237 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 144537 event pairs, 2366 based on Foata normal form. 2751/19941 useless extension candidates. Maximal degree in co-relation 129676. Up to 5599 conditions per place. [2022-12-13 12:57:14,883 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 1019 selfloop transitions, 159 changer transitions 133/1314 dead transitions. [2022-12-13 12:57:14,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1314 transitions, 17086 flow [2022-12-13 12:57:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-13 12:57:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-12-13 12:57:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 6123 transitions. [2022-12-13 12:57:14,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32708333333333334 [2022-12-13 12:57:14,892 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 6123 transitions. [2022-12-13 12:57:14,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 6123 transitions. [2022-12-13 12:57:14,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:57:14,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 6123 transitions. [2022-12-13 12:57:14,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 85.04166666666667) internal successors, (6123), 72 states have internal predecessors, (6123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:14,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 260.0) internal successors, (18980), 73 states have internal predecessors, (18980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:14,913 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 260.0) internal successors, (18980), 73 states have internal predecessors, (18980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:14,913 INFO L175 Difference]: Start difference. First operand has 357 places, 267 transitions, 3877 flow. Second operand 72 states and 6123 transitions. [2022-12-13 12:57:14,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1314 transitions, 17086 flow [2022-12-13 12:57:15,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1314 transitions, 16559 flow, removed 13 selfloop flow, removed 28 redundant places. [2022-12-13 12:57:15,544 INFO L231 Difference]: Finished difference. Result has 404 places, 302 transitions, 4505 flow [2022-12-13 12:57:15,544 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3320, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=4505, PETRI_PLACES=404, PETRI_TRANSITIONS=302} [2022-12-13 12:57:15,545 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 367 predicate places. [2022-12-13 12:57:15,545 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 302 transitions, 4505 flow [2022-12-13 12:57:15,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 78.0754716981132) internal successors, (4138), 53 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:15,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:57:15,545 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:57:15,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-12-13 12:57:15,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:57:15,746 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:57:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:57:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash -406227161, now seen corresponding path program 7 times [2022-12-13 12:57:15,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:57:15,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533890365] [2022-12-13 12:57:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:57:15,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:57:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:57:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:15,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:57:15,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533890365] [2022-12-13 12:57:15,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533890365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:57:15,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686839019] [2022-12-13 12:57:15,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:57:15,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:57:15,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:57:15,911 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:57:15,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-13 12:57:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:57:16,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:57:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:57:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:16,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:57:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:16,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686839019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:57:16,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:57:16,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-12-13 12:57:16,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173076582] [2022-12-13 12:57:16,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:57:16,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 12:57:16,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:57:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 12:57:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 12:57:16,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:57:16,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 302 transitions, 4505 flow. Second operand has 39 states, 39 states have (on average 104.15384615384616) internal successors, (4062), 39 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:16,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:57:16,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:57:16,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:57:20,673 INFO L130 PetriNetUnfolder]: 9623/17755 cut-off events. [2022-12-13 12:57:20,674 INFO L131 PetriNetUnfolder]: For 167152/167419 co-relation queries the response was YES. [2022-12-13 12:57:20,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133549 conditions, 17755 events. 9623/17755 cut-off events. For 167152/167419 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 147410 event pairs, 4268 based on Foata normal form. 435/18186 useless extension candidates. Maximal degree in co-relation 133475. Up to 9799 conditions per place. [2022-12-13 12:57:20,822 INFO L137 encePairwiseOnDemand]: 253/260 looper letters, 244 selfloop transitions, 22 changer transitions 300/572 dead transitions. [2022-12-13 12:57:20,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 572 transitions, 9986 flow [2022-12-13 12:57:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:57:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 12:57:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1942 transitions. [2022-12-13 12:57:20,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.414957264957265 [2022-12-13 12:57:20,824 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1942 transitions. [2022-12-13 12:57:20,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1942 transitions. [2022-12-13 12:57:20,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:57:20,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1942 transitions. [2022-12-13 12:57:20,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 107.88888888888889) internal successors, (1942), 18 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:20,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:20,828 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:20,828 INFO L175 Difference]: Start difference. First operand has 404 places, 302 transitions, 4505 flow. Second operand 18 states and 1942 transitions. [2022-12-13 12:57:20,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 572 transitions, 9986 flow [2022-12-13 12:57:21,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 572 transitions, 9090 flow, removed 112 selfloop flow, removed 29 redundant places. [2022-12-13 12:57:21,405 INFO L231 Difference]: Finished difference. Result has 393 places, 237 transitions, 3343 flow [2022-12-13 12:57:21,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=4095, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3343, PETRI_PLACES=393, PETRI_TRANSITIONS=237} [2022-12-13 12:57:21,405 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 356 predicate places. [2022-12-13 12:57:21,405 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 237 transitions, 3343 flow [2022-12-13 12:57:21,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 104.15384615384616) internal successors, (4062), 39 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:21,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:57:21,406 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2022-12-13 12:57:21,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-13 12:57:21,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:57:21,606 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:57:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:57:21,607 INFO L85 PathProgramCache]: Analyzing trace with hash 712311365, now seen corresponding path program 7 times [2022-12-13 12:57:21,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:57:21,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599756085] [2022-12-13 12:57:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:57:21,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:57:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:57:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:21,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:57:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599756085] [2022-12-13 12:57:21,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599756085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:57:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861690998] [2022-12-13 12:57:21,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:57:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:57:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:57:21,854 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:57:21,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-13 12:57:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:57:22,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:57:22,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:57:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:22,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:57:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:22,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861690998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:57:22,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:57:22,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2022-12-13 12:57:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766488149] [2022-12-13 12:57:22,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:57:22,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 12:57:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:57:22,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 12:57:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 12:57:22,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:57:22,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 237 transitions, 3343 flow. Second operand has 44 states, 44 states have (on average 104.11363636363636) internal successors, (4581), 44 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:22,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:57:22,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:57:22,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:57:26,387 INFO L130 PetriNetUnfolder]: 7028/13244 cut-off events. [2022-12-13 12:57:26,388 INFO L131 PetriNetUnfolder]: For 137655/138833 co-relation queries the response was YES. [2022-12-13 12:57:26,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100536 conditions, 13244 events. 7028/13244 cut-off events. For 137655/138833 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 109491 event pairs, 3248 based on Foata normal form. 1334/14542 useless extension candidates. Maximal degree in co-relation 100463. Up to 5843 conditions per place. [2022-12-13 12:57:26,501 INFO L137 encePairwiseOnDemand]: 253/260 looper letters, 322 selfloop transitions, 84 changer transitions 119/527 dead transitions. [2022-12-13 12:57:26,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 527 transitions, 7170 flow [2022-12-13 12:57:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 12:57:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 12:57:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2949 transitions. [2022-12-13 12:57:26,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4200854700854701 [2022-12-13 12:57:26,505 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2949 transitions. [2022-12-13 12:57:26,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2949 transitions. [2022-12-13 12:57:26,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:57:26,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2949 transitions. [2022-12-13 12:57:26,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 109.22222222222223) internal successors, (2949), 27 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:26,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 260.0) internal successors, (7280), 28 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:26,513 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 260.0) internal successors, (7280), 28 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:26,513 INFO L175 Difference]: Start difference. First operand has 393 places, 237 transitions, 3343 flow. Second operand 27 states and 2949 transitions. [2022-12-13 12:57:26,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 527 transitions, 7170 flow [2022-12-13 12:57:27,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 527 transitions, 6853 flow, removed 59 selfloop flow, removed 18 redundant places. [2022-12-13 12:57:27,959 INFO L231 Difference]: Finished difference. Result has 344 places, 226 transitions, 3220 flow [2022-12-13 12:57:27,959 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3220, PETRI_PLACES=344, PETRI_TRANSITIONS=226} [2022-12-13 12:57:27,959 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 307 predicate places. [2022-12-13 12:57:27,959 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 226 transitions, 3220 flow [2022-12-13 12:57:27,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 104.11363636363636) internal successors, (4581), 44 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:27,960 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:57:27,960 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:57:27,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-13 12:57:28,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-13 12:57:28,161 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:57:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:57:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash -384911831, now seen corresponding path program 8 times [2022-12-13 12:57:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:57:28,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339066000] [2022-12-13 12:57:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:57:28,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:57:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:57:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:28,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:57:28,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339066000] [2022-12-13 12:57:28,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339066000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:57:28,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944348827] [2022-12-13 12:57:28,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:57:28,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:57:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:57:28,687 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:57:28,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-13 12:57:28,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:57:28,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:57:28,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:57:28,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:57:29,135 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 [2022-12-13 12:57:29,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:57:29,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:57:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:57:29,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:57:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:29,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:57:30,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:57:30,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:57:30,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:57:30,112 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 157 treesize of output 145 [2022-12-13 12:57:30,117 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 65 treesize of output 53 [2022-12-13 12:57:30,121 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 94 [2022-12-13 12:57:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:30,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944348827] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:57:30,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:57:30,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-13 12:57:30,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910707308] [2022-12-13 12:57:30,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:57:30,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 12:57:30,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:57:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 12:57:30,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2483, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 12:57:32,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:57:34,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:57:35,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 260 [2022-12-13 12:57:35,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 226 transitions, 3220 flow. Second operand has 53 states, 53 states have (on average 81.13207547169812) internal successors, (4300), 53 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:35,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:57:35,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 260 [2022-12-13 12:57:35,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:57:36,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:57:53,500 INFO L130 PetriNetUnfolder]: 7577/14196 cut-off events. [2022-12-13 12:57:53,500 INFO L131 PetriNetUnfolder]: For 99162/99372 co-relation queries the response was YES. [2022-12-13 12:57:53,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107128 conditions, 14196 events. 7577/14196 cut-off events. For 99162/99372 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 116011 event pairs, 445 based on Foata normal form. 800/14992 useless extension candidates. Maximal degree in co-relation 107063. Up to 4719 conditions per place. [2022-12-13 12:57:53,606 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 724 selfloop transitions, 47 changer transitions 473/1248 dead transitions. [2022-12-13 12:57:53,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1248 transitions, 21749 flow [2022-12-13 12:57:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 12:57:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 12:57:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4518 transitions. [2022-12-13 12:57:53,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3341715976331361 [2022-12-13 12:57:53,611 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4518 transitions. [2022-12-13 12:57:53,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4518 transitions. [2022-12-13 12:57:53,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:57:53,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4518 transitions. [2022-12-13 12:57:53,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 86.88461538461539) internal successors, (4518), 52 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:53,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 260.0) internal successors, (13780), 53 states have internal predecessors, (13780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:53,621 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 260.0) internal successors, (13780), 53 states have internal predecessors, (13780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:53,622 INFO L175 Difference]: Start difference. First operand has 344 places, 226 transitions, 3220 flow. Second operand 52 states and 4518 transitions. [2022-12-13 12:57:53,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1248 transitions, 21749 flow [2022-12-13 12:57:53,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1248 transitions, 21335 flow, removed 29 selfloop flow, removed 16 redundant places. [2022-12-13 12:57:53,978 INFO L231 Difference]: Finished difference. Result has 380 places, 173 transitions, 2544 flow [2022-12-13 12:57:53,978 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2544, PETRI_PLACES=380, PETRI_TRANSITIONS=173} [2022-12-13 12:57:53,978 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 343 predicate places. [2022-12-13 12:57:53,978 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 173 transitions, 2544 flow [2022-12-13 12:57:53,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 81.13207547169812) internal successors, (4300), 53 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:57:53,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:57:53,979 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1] [2022-12-13 12:57:53,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-13 12:57:54,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:57:54,179 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:57:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:57:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash -498255707, now seen corresponding path program 8 times [2022-12-13 12:57:54,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:57:54,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340552724] [2022-12-13 12:57:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:57:54,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:57:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:57:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:54,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:57:54,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340552724] [2022-12-13 12:57:54,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340552724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:57:54,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092450119] [2022-12-13 12:57:54,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:57:54,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:57:54,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:57:54,854 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:57:54,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-13 12:57:55,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:57:55,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:57:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 12:57:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:57:55,077 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 14 treesize of output 12 [2022-12-13 12:57:55,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 12:57:55,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:57:55,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:57:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:55,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:57:56,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:57:56,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-12-13 12:57:56,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:57:56,511 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 89 treesize of output 85 [2022-12-13 12:57:56,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-12-13 12:57:56,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-12-13 12:57:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:57:57,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092450119] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:57:57,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:57:57,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-12-13 12:57:57,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055069815] [2022-12-13 12:57:57,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:57:57,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 12:57:57,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:57:57,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 12:57:57,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3160, Unknown=2, NotChecked=0, Total=3422 [2022-12-13 12:58:01,698 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 260 [2022-12-13 12:58:01,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 173 transitions, 2544 flow. Second operand has 59 states, 59 states have (on average 78.0677966101695) internal successors, (4606), 59 states have internal predecessors, (4606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:01,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:58:01,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 260 [2022-12-13 12:58:01,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:58:49,411 INFO L130 PetriNetUnfolder]: 8518/16048 cut-off events. [2022-12-13 12:58:49,412 INFO L131 PetriNetUnfolder]: For 202684/204939 co-relation queries the response was YES. [2022-12-13 12:58:49,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132756 conditions, 16048 events. 8518/16048 cut-off events. For 202684/204939 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 137815 event pairs, 2400 based on Foata normal form. 2847/18891 useless extension candidates. Maximal degree in co-relation 132685. Up to 4941 conditions per place. [2022-12-13 12:58:49,535 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 1029 selfloop transitions, 120 changer transitions 239/1390 dead transitions. [2022-12-13 12:58:49,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1390 transitions, 22090 flow [2022-12-13 12:58:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-13 12:58:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-13 12:58:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5542 transitions. [2022-12-13 12:58:49,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32792899408284026 [2022-12-13 12:58:49,540 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5542 transitions. [2022-12-13 12:58:49,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5542 transitions. [2022-12-13 12:58:49,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:58:49,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5542 transitions. [2022-12-13 12:58:49,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 85.26153846153846) internal successors, (5542), 65 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:49,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 260.0) internal successors, (17160), 66 states have internal predecessors, (17160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:49,551 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 260.0) internal successors, (17160), 66 states have internal predecessors, (17160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:49,551 INFO L175 Difference]: Start difference. First operand has 380 places, 173 transitions, 2544 flow. Second operand 65 states and 5542 transitions. [2022-12-13 12:58:49,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1390 transitions, 22090 flow [2022-12-13 12:58:50,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1390 transitions, 20177 flow, removed 281 selfloop flow, removed 31 redundant places. [2022-12-13 12:58:50,327 INFO L231 Difference]: Finished difference. Result has 372 places, 208 transitions, 3186 flow [2022-12-13 12:58:50,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3186, PETRI_PLACES=372, PETRI_TRANSITIONS=208} [2022-12-13 12:58:50,327 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 335 predicate places. [2022-12-13 12:58:50,327 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 208 transitions, 3186 flow [2022-12-13 12:58:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 78.0677966101695) internal successors, (4606), 59 states have internal predecessors, (4606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:50,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:58:50,328 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1] [2022-12-13 12:58:50,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-13 12:58:50,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:50,528 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:58:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash 801720108, now seen corresponding path program 10 times [2022-12-13 12:58:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:50,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676788641] [2022-12-13 12:58:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:58:51,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:51,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676788641] [2022-12-13 12:58:51,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676788641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:51,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764092447] [2022-12-13 12:58:51,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:58:51,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:51,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:51,129 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:51,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-13 12:58:51,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:58:51,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:51,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 12:58:51,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:51,577 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 13 treesize of output 9 [2022-12-13 12:58:51,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:58:51,612 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 [2022-12-13 12:58:51,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:58:51,649 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 [2022-12-13 12:58:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:58:51,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:52,081 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2693 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2693) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 28 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:58:52,173 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:58:52,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-12-13 12:58:52,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:58:52,179 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 37 treesize of output 33 [2022-12-13 12:58:52,181 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 7 treesize of output 3 [2022-12-13 12:58:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-12-13 12:58:52,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764092447] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:52,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:52,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-12-13 12:58:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582455278] [2022-12-13 12:58:52,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:52,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 12:58:52,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 12:58:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2892, Unknown=11, NotChecked=108, Total=3192 [2022-12-13 12:58:52,487 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 12:58:52,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 208 transitions, 3186 flow. Second operand has 57 states, 57 states have (on average 90.0701754385965) internal successors, (5134), 57 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:52,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:58:52,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 12:58:52,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:58:56,650 INFO L130 PetriNetUnfolder]: 7480/14034 cut-off events. [2022-12-13 12:58:56,650 INFO L131 PetriNetUnfolder]: For 199765/201241 co-relation queries the response was YES. [2022-12-13 12:58:56,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116508 conditions, 14034 events. 7480/14034 cut-off events. For 199765/201241 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 114911 event pairs, 5855 based on Foata normal form. 1478/15410 useless extension candidates. Maximal degree in co-relation 116424. Up to 13364 conditions per place. [2022-12-13 12:58:56,764 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 155 selfloop transitions, 85 changer transitions 0/242 dead transitions. [2022-12-13 12:58:56,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 242 transitions, 4144 flow [2022-12-13 12:58:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 12:58:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 12:58:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2115 transitions. [2022-12-13 12:58:56,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3536789297658863 [2022-12-13 12:58:56,786 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2115 transitions. [2022-12-13 12:58:56,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2115 transitions. [2022-12-13 12:58:56,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:58:56,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2115 transitions. [2022-12-13 12:58:56,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 91.95652173913044) internal successors, (2115), 23 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:56,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 260.0) internal successors, (6240), 24 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:56,792 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 260.0) internal successors, (6240), 24 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:56,792 INFO L175 Difference]: Start difference. First operand has 372 places, 208 transitions, 3186 flow. Second operand 23 states and 2115 transitions. [2022-12-13 12:58:56,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 242 transitions, 4144 flow [2022-12-13 12:58:57,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 242 transitions, 3926 flow, removed 24 selfloop flow, removed 27 redundant places. [2022-12-13 12:58:57,362 INFO L231 Difference]: Finished difference. Result has 363 places, 214 transitions, 3220 flow [2022-12-13 12:58:57,363 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3220, PETRI_PLACES=363, PETRI_TRANSITIONS=214} [2022-12-13 12:58:57,363 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 326 predicate places. [2022-12-13 12:58:57,363 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 214 transitions, 3220 flow [2022-12-13 12:58:57,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 90.0701754385965) internal successors, (5134), 57 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:57,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:58:57,364 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:57,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-13 12:58:57,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:57,565 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:58:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:57,566 INFO L85 PathProgramCache]: Analyzing trace with hash 275863400, now seen corresponding path program 10 times [2022-12-13 12:58:57,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:57,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327880977] [2022-12-13 12:58:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:57,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:58:58,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:58,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327880977] [2022-12-13 12:58:58,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327880977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:58,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182806110] [2022-12-13 12:58:58,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:58:58,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:58,256 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:58,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-13 12:58:58,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:58:58,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 12:58:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:58,745 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 13 treesize of output 9 [2022-12-13 12:58:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:58:58,789 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 27 treesize of output 26 [2022-12-13 12:58:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:58:58,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:58:58,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:58:58,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:58:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:58:59,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:59,252 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2757 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2757) c_~A~0.base) (+ c_~A~0.offset 24)) 4294967296))) is different from false [2022-12-13 12:58:59,431 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:58:59,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2022-12-13 12:58:59,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:58:59,438 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 81 treesize of output 77 [2022-12-13 12:58:59,441 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 62 treesize of output 54 [2022-12-13 12:58:59,446 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 28 treesize of output 24 [2022-12-13 12:58:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:58:59,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182806110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:59,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:59,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-12-13 12:58:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570333046] [2022-12-13 12:58:59,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:59,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 12:58:59,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:59,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 12:58:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2570, Unknown=14, NotChecked=102, Total=2862 [2022-12-13 12:58:59,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:58:59,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 214 transitions, 3220 flow. Second operand has 54 states, 54 states have (on average 87.12962962962963) internal successors, (4705), 54 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:58:59,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:58:59,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:58:59,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:59:04,843 INFO L130 PetriNetUnfolder]: 7086/13603 cut-off events. [2022-12-13 12:59:04,843 INFO L131 PetriNetUnfolder]: For 191036/191532 co-relation queries the response was YES. [2022-12-13 12:59:04,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102341 conditions, 13603 events. 7086/13603 cut-off events. For 191036/191532 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 114373 event pairs, 1206 based on Foata normal form. 1118/14713 useless extension candidates. Maximal degree in co-relation 102256. Up to 4443 conditions per place. [2022-12-13 12:59:04,965 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 692 selfloop transitions, 31 changer transitions 0/729 dead transitions. [2022-12-13 12:59:04,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 729 transitions, 13085 flow [2022-12-13 12:59:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 12:59:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 12:59:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1835 transitions. [2022-12-13 12:59:04,967 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3528846153846154 [2022-12-13 12:59:04,967 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1835 transitions. [2022-12-13 12:59:04,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1835 transitions. [2022-12-13 12:59:04,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:59:04,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1835 transitions. [2022-12-13 12:59:04,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 91.75) internal successors, (1835), 20 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:04,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 260.0) internal successors, (5460), 21 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:04,971 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 260.0) internal successors, (5460), 21 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:04,971 INFO L175 Difference]: Start difference. First operand has 363 places, 214 transitions, 3220 flow. Second operand 20 states and 1835 transitions. [2022-12-13 12:59:04,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 729 transitions, 13085 flow [2022-12-13 12:59:05,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 729 transitions, 12611 flow, removed 14 selfloop flow, removed 37 redundant places. [2022-12-13 12:59:05,312 INFO L231 Difference]: Finished difference. Result has 345 places, 212 transitions, 2936 flow [2022-12-13 12:59:05,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2936, PETRI_PLACES=345, PETRI_TRANSITIONS=212} [2022-12-13 12:59:05,313 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 308 predicate places. [2022-12-13 12:59:05,313 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 212 transitions, 2936 flow [2022-12-13 12:59:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 87.12962962962963) internal successors, (4705), 54 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:05,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:59:05,313 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:59:05,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-12-13 12:59:05,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:05,514 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:59:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:59:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash -38165229, now seen corresponding path program 11 times [2022-12-13 12:59:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:59:05,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695228096] [2022-12-13 12:59:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:59:05,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:59:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:59:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:06,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:59:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695228096] [2022-12-13 12:59:06,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695228096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:59:06,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234901553] [2022-12-13 12:59:06,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:59:06,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:59:06,157 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:59:06,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-13 12:59:06,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 12:59:06,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:59:06,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 12:59:06,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:59:06,687 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 13 treesize of output 9 [2022-12-13 12:59:06,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:06,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:59:06,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:06,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:59:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:07,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:59:07,316 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2819 (Array Int Int)) (v_ArrVal_2818 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2818) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2819) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 28 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2022-12-13 12:59:07,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:07,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 12:59:07,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:07,329 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 81 treesize of output 77 [2022-12-13 12:59:07,333 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 32 treesize of output 28 [2022-12-13 12:59:07,336 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 58 treesize of output 50 [2022-12-13 12:59:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-12-13 12:59:07,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234901553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:59:07,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:59:07,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-12-13 12:59:07,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771656358] [2022-12-13 12:59:07,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:59:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 12:59:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:59:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 12:59:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2892, Unknown=9, NotChecked=108, Total=3192 [2022-12-13 12:59:07,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:59:07,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 212 transitions, 2936 flow. Second operand has 57 states, 57 states have (on average 87.12280701754386) internal successors, (4966), 57 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:07,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:59:07,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:59:07,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:59:13,363 INFO L130 PetriNetUnfolder]: 8101/15574 cut-off events. [2022-12-13 12:59:13,363 INFO L131 PetriNetUnfolder]: For 125334/125663 co-relation queries the response was YES. [2022-12-13 12:59:13,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119571 conditions, 15574 events. 8101/15574 cut-off events. For 125334/125663 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 132367 event pairs, 1205 based on Foata normal form. 957/16527 useless extension candidates. Maximal degree in co-relation 119502. Up to 5012 conditions per place. [2022-12-13 12:59:13,519 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 754 selfloop transitions, 33 changer transitions 0/793 dead transitions. [2022-12-13 12:59:13,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 793 transitions, 13826 flow [2022-12-13 12:59:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 12:59:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 12:59:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2019 transitions. [2022-12-13 12:59:13,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.352972027972028 [2022-12-13 12:59:13,522 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2019 transitions. [2022-12-13 12:59:13,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2019 transitions. [2022-12-13 12:59:13,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:59:13,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2019 transitions. [2022-12-13 12:59:13,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 91.77272727272727) internal successors, (2019), 22 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:13,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 260.0) internal successors, (5980), 23 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:13,529 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 260.0) internal successors, (5980), 23 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:13,529 INFO L175 Difference]: Start difference. First operand has 345 places, 212 transitions, 2936 flow. Second operand 22 states and 2019 transitions. [2022-12-13 12:59:13,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 793 transitions, 13826 flow [2022-12-13 12:59:13,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 793 transitions, 13775 flow, removed 2 selfloop flow, removed 15 redundant places. [2022-12-13 12:59:13,838 INFO L231 Difference]: Finished difference. Result has 353 places, 214 transitions, 3010 flow [2022-12-13 12:59:13,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3010, PETRI_PLACES=353, PETRI_TRANSITIONS=214} [2022-12-13 12:59:13,839 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 316 predicate places. [2022-12-13 12:59:13,839 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 214 transitions, 3010 flow [2022-12-13 12:59:13,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 87.12280701754386) internal successors, (4966), 57 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:13,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:59:13,840 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1] [2022-12-13 12:59:13,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-13 12:59:14,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-13 12:59:14,041 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:59:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:59:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1412945368, now seen corresponding path program 9 times [2022-12-13 12:59:14,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:59:14,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443804739] [2022-12-13 12:59:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:59:14,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:59:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:59:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:14,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:59:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443804739] [2022-12-13 12:59:14,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443804739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:59:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74976521] [2022-12-13 12:59:14,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:59:14,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:14,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:59:14,875 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:59:14,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-13 12:59:15,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 12:59:15,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:59:15,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 12:59:15,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:59:15,628 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 13 treesize of output 9 [2022-12-13 12:59:15,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:15,683 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 [2022-12-13 12:59:15,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:15,724 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 [2022-12-13 12:59:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:15,835 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 [2022-12-13 12:59:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:16,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:59:16,266 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2887 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2887) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 24)) 4294967296)) is different from false [2022-12-13 12:59:16,539 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:59:16,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-12-13 12:59:16,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:16,547 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 141 treesize of output 131 [2022-12-13 12:59:16,551 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 102 [2022-12-13 12:59:16,555 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 [2022-12-13 12:59:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:16,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74976521] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:59:16,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:59:16,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2022-12-13 12:59:16,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841691037] [2022-12-13 12:59:16,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:59:16,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 12:59:16,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:59:16,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 12:59:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3431, Unknown=36, NotChecked=118, Total=3782 [2022-12-13 12:59:17,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:59:17,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 214 transitions, 3010 flow. Second operand has 62 states, 62 states have (on average 87.06451612903226) internal successors, (5398), 62 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:17,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:59:17,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:59:17,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:59:22,291 INFO L130 PetriNetUnfolder]: 7685/14788 cut-off events. [2022-12-13 12:59:22,291 INFO L131 PetriNetUnfolder]: For 160510/162001 co-relation queries the response was YES. [2022-12-13 12:59:22,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117273 conditions, 14788 events. 7685/14788 cut-off events. For 160510/162001 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 126356 event pairs, 3717 based on Foata normal form. 1581/16334 useless extension candidates. Maximal degree in co-relation 117202. Up to 4920 conditions per place. [2022-12-13 12:59:22,412 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 450 selfloop transitions, 75 changer transitions 0/527 dead transitions. [2022-12-13 12:59:22,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 527 transitions, 8042 flow [2022-12-13 12:59:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 12:59:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 12:59:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2033 transitions. [2022-12-13 12:59:22,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35541958041958044 [2022-12-13 12:59:22,415 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2033 transitions. [2022-12-13 12:59:22,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2033 transitions. [2022-12-13 12:59:22,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:59:22,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2033 transitions. [2022-12-13 12:59:22,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 92.4090909090909) internal successors, (2033), 22 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:22,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 260.0) internal successors, (5980), 23 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:22,419 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 260.0) internal successors, (5980), 23 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:22,419 INFO L175 Difference]: Start difference. First operand has 353 places, 214 transitions, 3010 flow. Second operand 22 states and 2033 transitions. [2022-12-13 12:59:22,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 527 transitions, 8042 flow [2022-12-13 12:59:22,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 527 transitions, 7665 flow, removed 44 selfloop flow, removed 18 redundant places. [2022-12-13 12:59:22,716 INFO L231 Difference]: Finished difference. Result has 356 places, 213 transitions, 3071 flow [2022-12-13 12:59:22,716 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3071, PETRI_PLACES=356, PETRI_TRANSITIONS=213} [2022-12-13 12:59:22,717 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 319 predicate places. [2022-12-13 12:59:22,717 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 213 transitions, 3071 flow [2022-12-13 12:59:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 87.06451612903226) internal successors, (5398), 62 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:22,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:59:22,718 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2022-12-13 12:59:22,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-13 12:59:22,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:22,919 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:59:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:59:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash -916477036, now seen corresponding path program 11 times [2022-12-13 12:59:22,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:59:22,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424239360] [2022-12-13 12:59:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:59:22,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:59:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:59:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:23,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:59:23,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424239360] [2022-12-13 12:59:23,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424239360] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:59:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792259382] [2022-12-13 12:59:23,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:59:23,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:23,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:59:23,665 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:59:23,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-13 12:59:23,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 12:59:23,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:59:23,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-13 12:59:23,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:59:24,157 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 13 treesize of output 9 [2022-12-13 12:59:24,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:24,185 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 [2022-12-13 12:59:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:24,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:59:24,499 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2948 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2948) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:59:24,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:24,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-12-13 12:59:24,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:24,510 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 37 treesize of output 33 [2022-12-13 12:59:24,519 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 7 treesize of output 3 [2022-12-13 12:59:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-12-13 12:59:24,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792259382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:59:24,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:59:24,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2022-12-13 12:59:24,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491084429] [2022-12-13 12:59:24,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:59:24,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 12:59:24,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:59:24,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 12:59:24,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2396, Unknown=1, NotChecked=98, Total=2652 [2022-12-13 12:59:24,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 12:59:24,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 213 transitions, 3071 flow. Second operand has 52 states, 52 states have (on average 90.0576923076923) internal successors, (4683), 52 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:24,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:59:24,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 12:59:24,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:59:29,170 INFO L130 PetriNetUnfolder]: 7639/14648 cut-off events. [2022-12-13 12:59:29,170 INFO L131 PetriNetUnfolder]: For 129822/131178 co-relation queries the response was YES. [2022-12-13 12:59:29,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113732 conditions, 14648 events. 7639/14648 cut-off events. For 129822/131178 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 122189 event pairs, 6452 based on Foata normal form. 1351/15921 useless extension candidates. Maximal degree in co-relation 113662. Up to 11507 conditions per place. [2022-12-13 12:59:29,281 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 193 selfloop transitions, 61 changer transitions 0/256 dead transitions. [2022-12-13 12:59:29,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 256 transitions, 4120 flow [2022-12-13 12:59:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 12:59:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 12:59:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2220 transitions. [2022-12-13 12:59:29,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3557692307692308 [2022-12-13 12:59:29,283 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2220 transitions. [2022-12-13 12:59:29,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2220 transitions. [2022-12-13 12:59:29,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:59:29,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2220 transitions. [2022-12-13 12:59:29,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.5) internal successors, (2220), 24 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:29,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 260.0) internal successors, (6500), 25 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:29,288 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 260.0) internal successors, (6500), 25 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:29,288 INFO L175 Difference]: Start difference. First operand has 356 places, 213 transitions, 3071 flow. Second operand 24 states and 2220 transitions. [2022-12-13 12:59:29,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 256 transitions, 4120 flow [2022-12-13 12:59:29,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 256 transitions, 3983 flow, removed 1 selfloop flow, removed 19 redundant places. [2022-12-13 12:59:29,527 INFO L231 Difference]: Finished difference. Result has 362 places, 218 transitions, 3153 flow [2022-12-13 12:59:29,527 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2934, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3153, PETRI_PLACES=362, PETRI_TRANSITIONS=218} [2022-12-13 12:59:29,528 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 325 predicate places. [2022-12-13 12:59:29,528 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 218 transitions, 3153 flow [2022-12-13 12:59:29,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 90.0576923076923) internal successors, (4683), 52 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:29,528 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:59:29,528 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1] [2022-12-13 12:59:29,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-13 12:59:29,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:29,729 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:59:29,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:59:29,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1034148870, now seen corresponding path program 10 times [2022-12-13 12:59:29,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:59:29,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256847882] [2022-12-13 12:59:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:59:29,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:59:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:59:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:30,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:59:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256847882] [2022-12-13 12:59:30,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256847882] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:59:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772334907] [2022-12-13 12:59:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:59:30,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:59:30,624 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:59:30,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-13 12:59:30,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:59:30,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:59:30,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 12:59:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:59:31,130 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 13 treesize of output 9 [2022-12-13 12:59:31,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:31,173 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 [2022-12-13 12:59:31,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:31,212 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 [2022-12-13 12:59:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:31,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:59:31,512 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3014 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3014) c_~A~0.base) (+ c_~A~0.offset 32)) 4294967296)) is different from false [2022-12-13 12:59:31,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:31,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 12:59:31,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:31,588 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 71 treesize of output 67 [2022-12-13 12:59:31,592 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 28 treesize of output 24 [2022-12-13 12:59:31,595 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 50 treesize of output 42 [2022-12-13 12:59:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:31,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772334907] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:59:31,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:59:31,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2022-12-13 12:59:31,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022369450] [2022-12-13 12:59:31,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:59:31,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 12:59:31,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:59:31,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 12:59:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2689, Unknown=7, NotChecked=104, Total=2970 [2022-12-13 12:59:32,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:59:32,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 218 transitions, 3153 flow. Second operand has 55 states, 55 states have (on average 87.07272727272728) internal successors, (4789), 55 states have internal predecessors, (4789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:32,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:59:32,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:59:32,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:59:38,370 INFO L130 PetriNetUnfolder]: 7505/14422 cut-off events. [2022-12-13 12:59:38,370 INFO L131 PetriNetUnfolder]: For 138704/140193 co-relation queries the response was YES. [2022-12-13 12:59:38,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110686 conditions, 14422 events. 7505/14422 cut-off events. For 138704/140193 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 122563 event pairs, 3675 based on Foata normal form. 1579/15976 useless extension candidates. Maximal degree in co-relation 110615. Up to 4840 conditions per place. [2022-12-13 12:59:38,475 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 423 selfloop transitions, 58 changer transitions 0/483 dead transitions. [2022-12-13 12:59:38,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 483 transitions, 7395 flow [2022-12-13 12:59:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 12:59:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 12:59:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2137 transitions. [2022-12-13 12:59:38,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35735785953177257 [2022-12-13 12:59:38,477 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2137 transitions. [2022-12-13 12:59:38,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2137 transitions. [2022-12-13 12:59:38,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:59:38,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2137 transitions. [2022-12-13 12:59:38,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 92.91304347826087) internal successors, (2137), 23 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:38,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 260.0) internal successors, (6240), 24 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:38,482 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 260.0) internal successors, (6240), 24 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:38,482 INFO L175 Difference]: Start difference. First operand has 362 places, 218 transitions, 3153 flow. Second operand 23 states and 2137 transitions. [2022-12-13 12:59:38,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 483 transitions, 7395 flow [2022-12-13 12:59:38,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 483 transitions, 7277 flow, removed 22 selfloop flow, removed 18 redundant places. [2022-12-13 12:59:38,788 INFO L231 Difference]: Finished difference. Result has 368 places, 220 transitions, 3228 flow [2022-12-13 12:59:38,788 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3228, PETRI_PLACES=368, PETRI_TRANSITIONS=220} [2022-12-13 12:59:38,789 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 331 predicate places. [2022-12-13 12:59:38,789 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 220 transitions, 3228 flow [2022-12-13 12:59:38,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 87.07272727272728) internal successors, (4789), 55 states have internal predecessors, (4789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:38,789 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:59:38,789 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1] [2022-12-13 12:59:38,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-12-13 12:59:38,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:38,990 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:59:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:59:38,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1566640815, now seen corresponding path program 7 times [2022-12-13 12:59:38,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:59:38,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429389120] [2022-12-13 12:59:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:59:38,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:59:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:59:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:39,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:59:39,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429389120] [2022-12-13 12:59:39,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429389120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:59:39,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010313374] [2022-12-13 12:59:39,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:59:39,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:39,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:59:39,747 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:59:39,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-13 12:59:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:59:39,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 12:59:39,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:59:40,193 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 16 treesize of output 12 [2022-12-13 12:59:40,228 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 [2022-12-13 12:59:40,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:40,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:59:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:40,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:59:40,583 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3081 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3081) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 12:59:40,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:40,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-12-13 12:59:40,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:40,693 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 43 treesize of output 39 [2022-12-13 12:59:40,695 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 9 treesize of output 5 [2022-12-13 12:59:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-12-13 12:59:40,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010313374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:59:40,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:59:40,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2022-12-13 12:59:40,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122179336] [2022-12-13 12:59:40,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:59:40,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 12:59:40,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:59:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 12:59:40,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2678, Unknown=19, NotChecked=104, Total=2970 [2022-12-13 12:59:41,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 12:59:41,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 220 transitions, 3228 flow. Second operand has 55 states, 55 states have (on average 90.05454545454545) internal successors, (4953), 55 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:41,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:59:41,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 12:59:41,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:59:46,182 INFO L130 PetriNetUnfolder]: 7511/14415 cut-off events. [2022-12-13 12:59:46,183 INFO L131 PetriNetUnfolder]: For 136546/137877 co-relation queries the response was YES. [2022-12-13 12:59:46,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112448 conditions, 14415 events. 7511/14415 cut-off events. For 136546/137877 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 119683 event pairs, 6200 based on Foata normal form. 1333/15673 useless extension candidates. Maximal degree in co-relation 112381. Up to 11132 conditions per place. [2022-12-13 12:59:46,301 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 207 selfloop transitions, 123 changer transitions 0/332 dead transitions. [2022-12-13 12:59:46,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 332 transitions, 5408 flow [2022-12-13 12:59:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 12:59:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 12:59:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4431 transitions. [2022-12-13 12:59:46,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35504807692307694 [2022-12-13 12:59:46,305 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4431 transitions. [2022-12-13 12:59:46,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4431 transitions. [2022-12-13 12:59:46,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:59:46,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4431 transitions. [2022-12-13 12:59:46,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 92.3125) internal successors, (4431), 48 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:46,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 260.0) internal successors, (12740), 49 states have internal predecessors, (12740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:46,314 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 260.0) internal successors, (12740), 49 states have internal predecessors, (12740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:46,314 INFO L175 Difference]: Start difference. First operand has 368 places, 220 transitions, 3228 flow. Second operand 48 states and 4431 transitions. [2022-12-13 12:59:46,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 332 transitions, 5408 flow [2022-12-13 12:59:46,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 332 transitions, 5236 flow, removed 8 selfloop flow, removed 22 redundant places. [2022-12-13 12:59:46,586 INFO L231 Difference]: Finished difference. Result has 394 places, 278 transitions, 4098 flow [2022-12-13 12:59:46,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3059, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4098, PETRI_PLACES=394, PETRI_TRANSITIONS=278} [2022-12-13 12:59:46,587 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 357 predicate places. [2022-12-13 12:59:46,587 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 278 transitions, 4098 flow [2022-12-13 12:59:46,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 90.05454545454545) internal successors, (4953), 55 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:46,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:59:46,587 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:59:46,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-12-13 12:59:46,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-12-13 12:59:46,788 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:59:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:59:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1183118136, now seen corresponding path program 12 times [2022-12-13 12:59:46,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:59:46,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704644413] [2022-12-13 12:59:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:59:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:59:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:59:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:47,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:59:47,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704644413] [2022-12-13 12:59:47,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704644413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:59:47,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792438717] [2022-12-13 12:59:47,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:59:47,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:47,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:59:47,084 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:59:47,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-13 12:59:47,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 12:59:47,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:59:47,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:59:47,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:59:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:47,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:59:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:48,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792438717] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:59:48,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:59:48,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2022-12-13 12:59:48,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391994677] [2022-12-13 12:59:48,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:59:48,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 12:59:48,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:59:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 12:59:48,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 12:59:48,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 12:59:48,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 278 transitions, 4098 flow. Second operand has 49 states, 49 states have (on average 104.12244897959184) internal successors, (5102), 49 states have internal predecessors, (5102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:48,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:59:48,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 12:59:48,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:59:52,301 INFO L130 PetriNetUnfolder]: 7544/14604 cut-off events. [2022-12-13 12:59:52,301 INFO L131 PetriNetUnfolder]: For 107634/107839 co-relation queries the response was YES. [2022-12-13 12:59:52,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111086 conditions, 14604 events. 7544/14604 cut-off events. For 107634/107839 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 122220 event pairs, 3465 based on Foata normal form. 429/15029 useless extension candidates. Maximal degree in co-relation 111020. Up to 7578 conditions per place. [2022-12-13 12:59:52,440 INFO L137 encePairwiseOnDemand]: 253/260 looper letters, 217 selfloop transitions, 18 changer transitions 289/529 dead transitions. [2022-12-13 12:59:52,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 529 transitions, 8308 flow [2022-12-13 12:59:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 12:59:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 12:59:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2368 transitions. [2022-12-13 12:59:52,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.413986013986014 [2022-12-13 12:59:52,442 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2368 transitions. [2022-12-13 12:59:52,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2368 transitions. [2022-12-13 12:59:52,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:59:52,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2368 transitions. [2022-12-13 12:59:52,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 107.63636363636364) internal successors, (2368), 22 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:52,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 260.0) internal successors, (5980), 23 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:52,447 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 260.0) internal successors, (5980), 23 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:52,447 INFO L175 Difference]: Start difference. First operand has 394 places, 278 transitions, 4098 flow. Second operand 22 states and 2368 transitions. [2022-12-13 12:59:52,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 529 transitions, 8308 flow [2022-12-13 12:59:52,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 529 transitions, 8146 flow, removed 15 selfloop flow, removed 20 redundant places. [2022-12-13 12:59:52,761 INFO L231 Difference]: Finished difference. Result has 397 places, 212 transitions, 3167 flow [2022-12-13 12:59:52,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3167, PETRI_PLACES=397, PETRI_TRANSITIONS=212} [2022-12-13 12:59:52,761 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 360 predicate places. [2022-12-13 12:59:52,761 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 212 transitions, 3167 flow [2022-12-13 12:59:52,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 104.12244897959184) internal successors, (5102), 49 states have internal predecessors, (5102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:52,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:59:52,762 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:59:52,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-12-13 12:59:52,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:52,963 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:59:52,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:59:52,964 INFO L85 PathProgramCache]: Analyzing trace with hash -688329008, now seen corresponding path program 9 times [2022-12-13 12:59:52,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:59:52,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081077547] [2022-12-13 12:59:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:59:52,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:59:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:59:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:53,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:59:53,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081077547] [2022-12-13 12:59:53,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081077547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:59:53,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497057864] [2022-12-13 12:59:53,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:59:53,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:59:53,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:59:53,652 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:59:53,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-13 12:59:54,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 12:59:54,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:59:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 12:59:54,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:59:54,357 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 13 treesize of output 9 [2022-12-13 12:59:54,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:54,403 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 [2022-12-13 12:59:54,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:54,443 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 [2022-12-13 12:59:54,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:59:54,476 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 [2022-12-13 12:59:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:59:54,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:59:54,950 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3207 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3207) c_~A~0.base) (+ c_~A~0.offset 28)) 9223372039002259456)) is different from false [2022-12-13 12:59:54,957 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3206 (Array Int Int)) (v_ArrVal_3207 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3206) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3207) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 28 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2022-12-13 12:59:55,061 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:59:55,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-12-13 12:59:55,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:59:55,068 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 141 treesize of output 131 [2022-12-13 12:59:55,071 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 102 [2022-12-13 12:59:55,074 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 [2022-12-13 12:59:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-12-13 12:59:55,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497057864] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:59:55,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:59:55,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2022-12-13 12:59:55,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65404847] [2022-12-13 12:59:55,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:59:55,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 12:59:55,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:59:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 12:59:55,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3114, Unknown=8, NotChecked=226, Total=3540 [2022-12-13 12:59:55,541 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 12:59:55,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 212 transitions, 3167 flow. Second operand has 60 states, 60 states have (on average 87.11666666666666) internal successors, (5227), 60 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:55,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:59:55,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 12:59:55,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:59:59,861 INFO L130 PetriNetUnfolder]: 6117/11751 cut-off events. [2022-12-13 12:59:59,861 INFO L131 PetriNetUnfolder]: For 117876/118071 co-relation queries the response was YES. [2022-12-13 12:59:59,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96365 conditions, 11751 events. 6117/11751 cut-off events. For 117876/118071 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 96482 event pairs, 872 based on Foata normal form. 443/12190 useless extension candidates. Maximal degree in co-relation 96296. Up to 3560 conditions per place. [2022-12-13 12:59:59,987 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 633 selfloop transitions, 24 changer transitions 0/662 dead transitions. [2022-12-13 12:59:59,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 662 transitions, 12391 flow [2022-12-13 12:59:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 12:59:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 12:59:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2017 transitions. [2022-12-13 12:59:59,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35262237762237764 [2022-12-13 12:59:59,990 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2017 transitions. [2022-12-13 12:59:59,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2017 transitions. [2022-12-13 12:59:59,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:59:59,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2017 transitions. [2022-12-13 12:59:59,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 91.68181818181819) internal successors, (2017), 22 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:59,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 260.0) internal successors, (5980), 23 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:59,995 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 260.0) internal successors, (5980), 23 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:59:59,995 INFO L175 Difference]: Start difference. First operand has 397 places, 212 transitions, 3167 flow. Second operand 22 states and 2017 transitions. [2022-12-13 12:59:59,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 662 transitions, 12391 flow [2022-12-13 13:00:01,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 662 transitions, 11392 flow, removed 18 selfloop flow, removed 28 redundant places. [2022-12-13 13:00:01,203 INFO L231 Difference]: Finished difference. Result has 340 places, 211 transitions, 2685 flow [2022-12-13 13:00:01,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2637, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2685, PETRI_PLACES=340, PETRI_TRANSITIONS=211} [2022-12-13 13:00:01,203 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 303 predicate places. [2022-12-13 13:00:01,203 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 211 transitions, 2685 flow [2022-12-13 13:00:01,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 87.11666666666666) internal successors, (5227), 60 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:01,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:00:01,204 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2022-12-13 13:00:01,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-13 13:00:01,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:01,405 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:00:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:01,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1653986348, now seen corresponding path program 12 times [2022-12-13 13:00:01,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:01,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823492369] [2022-12-13 13:00:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:01,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:01,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:01,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823492369] [2022-12-13 13:00:01,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823492369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:01,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144224137] [2022-12-13 13:00:01,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:00:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:01,794 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:01,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-13 13:00:02,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 13:00:02,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:00:02,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 13:00:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:02,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:03,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144224137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:03,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:03,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 52 [2022-12-13 13:00:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004052701] [2022-12-13 13:00:03,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 13:00:03,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:03,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 13:00:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2170, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 13:00:03,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 13:00:03,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 211 transitions, 2685 flow. Second operand has 54 states, 54 states have (on average 104.07407407407408) internal successors, (5620), 54 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:03,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:00:03,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 13:00:03,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:00:06,903 INFO L130 PetriNetUnfolder]: 5427/10476 cut-off events. [2022-12-13 13:00:06,903 INFO L131 PetriNetUnfolder]: For 92944/93928 co-relation queries the response was YES. [2022-12-13 13:00:06,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82122 conditions, 10476 events. 5427/10476 cut-off events. For 92944/93928 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 85599 event pairs, 2293 based on Foata normal form. 1162/11638 useless extension candidates. Maximal degree in co-relation 82061. Up to 3762 conditions per place. [2022-12-13 13:00:06,999 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 437 selfloop transitions, 69 changer transitions 168/675 dead transitions. [2022-12-13 13:00:06,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 675 transitions, 9393 flow [2022-12-13 13:00:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 13:00:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 13:00:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3640 transitions. [2022-12-13 13:00:07,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2022-12-13 13:00:07,003 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3640 transitions. [2022-12-13 13:00:07,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3640 transitions. [2022-12-13 13:00:07,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:00:07,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3640 transitions. [2022-12-13 13:00:07,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 110.3030303030303) internal successors, (3640), 33 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:07,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 260.0) internal successors, (8840), 34 states have internal predecessors, (8840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:07,010 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 260.0) internal successors, (8840), 34 states have internal predecessors, (8840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:07,010 INFO L175 Difference]: Start difference. First operand has 340 places, 211 transitions, 2685 flow. Second operand 33 states and 3640 transitions. [2022-12-13 13:00:07,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 675 transitions, 9393 flow [2022-12-13 13:00:07,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 675 transitions, 8990 flow, removed 12 selfloop flow, removed 20 redundant places. [2022-12-13 13:00:07,168 INFO L231 Difference]: Finished difference. Result has 370 places, 210 transitions, 2805 flow [2022-12-13 13:00:07,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2805, PETRI_PLACES=370, PETRI_TRANSITIONS=210} [2022-12-13 13:00:07,168 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 333 predicate places. [2022-12-13 13:00:07,168 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 210 transitions, 2805 flow [2022-12-13 13:00:07,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 104.07407407407408) internal successors, (5620), 54 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:07,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:00:07,169 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:07,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-13 13:00:07,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-12-13 13:00:07,370 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:00:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:07,371 INFO L85 PathProgramCache]: Analyzing trace with hash 468129305, now seen corresponding path program 9 times [2022-12-13 13:00:07,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:07,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501904628] [2022-12-13 13:00:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:07,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:08,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:08,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501904628] [2022-12-13 13:00:08,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501904628] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:08,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932468662] [2022-12-13 13:00:08,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:00:08,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:08,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:08,319 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:08,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-13 13:00:08,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 13:00:08,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:00:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 13:00:08,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:09,002 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 13 treesize of output 9 [2022-12-13 13:00:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:00:09,045 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 27 treesize of output 26 [2022-12-13 13:00:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:00:09,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:00:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:00:09,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:00:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:09,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:09,531 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3337 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3337) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 32)) 9223372039002259456))) is different from false [2022-12-13 13:00:09,535 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3337 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3337) c_~A~0.base) (+ c_~A~0.offset 32)) 9223372039002259456))) is different from false [2022-12-13 13:00:09,542 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3336 (Array Int Int)) (v_ArrVal_3337 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3336) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3337) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 13:00:09,670 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 13:00:09,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2022-12-13 13:00:09,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:00:09,675 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 81 treesize of output 77 [2022-12-13 13:00:09,678 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 62 treesize of output 54 [2022-12-13 13:00:09,681 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 28 treesize of output 24 [2022-12-13 13:00:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2022-12-13 13:00:09,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932468662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:09,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:09,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 59 [2022-12-13 13:00:09,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569160571] [2022-12-13 13:00:09,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:09,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 13:00:09,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 13:00:09,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3121, Unknown=18, NotChecked=342, Total=3660 [2022-12-13 13:00:10,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 13:00:10,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 210 transitions, 2805 flow. Second operand has 61 states, 61 states have (on average 87.08196721311475) internal successors, (5312), 61 states have internal predecessors, (5312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:10,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:00:10,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 13:00:10,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:00:14,599 INFO L130 PetriNetUnfolder]: 5363/10368 cut-off events. [2022-12-13 13:00:14,599 INFO L131 PetriNetUnfolder]: For 133141/134038 co-relation queries the response was YES. [2022-12-13 13:00:14,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82911 conditions, 10368 events. 5363/10368 cut-off events. For 133141/134038 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 84021 event pairs, 1965 based on Foata normal form. 940/11308 useless extension candidates. Maximal degree in co-relation 82832. Up to 3121 conditions per place. [2022-12-13 13:00:14,699 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 399 selfloop transitions, 71 changer transitions 0/471 dead transitions. [2022-12-13 13:00:14,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 471 transitions, 7176 flow [2022-12-13 13:00:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:00:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 13:00:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2218 transitions. [2022-12-13 13:00:14,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35544871794871796 [2022-12-13 13:00:14,702 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2218 transitions. [2022-12-13 13:00:14,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2218 transitions. [2022-12-13 13:00:14,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:00:14,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2218 transitions. [2022-12-13 13:00:14,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.41666666666667) internal successors, (2218), 24 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:14,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 260.0) internal successors, (6500), 25 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:14,706 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 260.0) internal successors, (6500), 25 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:14,706 INFO L175 Difference]: Start difference. First operand has 370 places, 210 transitions, 2805 flow. Second operand 24 states and 2218 transitions. [2022-12-13 13:00:14,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 471 transitions, 7176 flow [2022-12-13 13:00:15,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 471 transitions, 6993 flow, removed 19 selfloop flow, removed 22 redundant places. [2022-12-13 13:00:15,019 INFO L231 Difference]: Finished difference. Result has 371 places, 209 transitions, 2734 flow [2022-12-13 13:00:15,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2734, PETRI_PLACES=371, PETRI_TRANSITIONS=209} [2022-12-13 13:00:15,019 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 334 predicate places. [2022-12-13 13:00:15,019 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 209 transitions, 2734 flow [2022-12-13 13:00:15,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 87.08196721311475) internal successors, (5312), 61 states have internal predecessors, (5312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:15,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:00:15,020 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:15,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-12-13 13:00:15,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:15,221 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:00:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash 136641225, now seen corresponding path program 10 times [2022-12-13 13:00:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:15,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077326926] [2022-12-13 13:00:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:15,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077326926] [2022-12-13 13:00:15,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077326926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106234571] [2022-12-13 13:00:15,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:00:15,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:15,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:15,997 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:15,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-13 13:00:16,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:00:16,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:00:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 13:00:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:16,602 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 13 treesize of output 9 [2022-12-13 13:00:16,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:00:16,640 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 [2022-12-13 13:00:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:00:16,683 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 [2022-12-13 13:00:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:16,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:17,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:00:17,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 13:00:17,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:00:17,133 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 71 treesize of output 67 [2022-12-13 13:00:17,135 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 54 treesize of output 46 [2022-12-13 13:00:17,139 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 24 treesize of output 20 [2022-12-13 13:00:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:17,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106234571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:17,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:17,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2022-12-13 13:00:17,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460866466] [2022-12-13 13:00:17,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:17,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 13:00:17,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:17,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 13:00:17,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2780, Unknown=18, NotChecked=0, Total=2970 [2022-12-13 13:00:18,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 13:00:18,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 209 transitions, 2734 flow. Second operand has 55 states, 55 states have (on average 87.10909090909091) internal successors, (4791), 55 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:18,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:00:18,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 13:00:18,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:00:22,716 INFO L130 PetriNetUnfolder]: 6262/12125 cut-off events. [2022-12-13 13:00:22,716 INFO L131 PetriNetUnfolder]: For 169241/169335 co-relation queries the response was YES. [2022-12-13 13:00:22,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96907 conditions, 12125 events. 6262/12125 cut-off events. For 169241/169335 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 99910 event pairs, 809 based on Foata normal form. 450/12575 useless extension candidates. Maximal degree in co-relation 96830. Up to 3503 conditions per place. [2022-12-13 13:00:22,830 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 632 selfloop transitions, 26 changer transitions 0/663 dead transitions. [2022-12-13 13:00:22,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 663 transitions, 11452 flow [2022-12-13 13:00:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 13:00:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 13:00:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2108 transitions. [2022-12-13 13:00:22,832 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35250836120401335 [2022-12-13 13:00:22,832 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2108 transitions. [2022-12-13 13:00:22,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2108 transitions. [2022-12-13 13:00:22,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:00:22,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2108 transitions. [2022-12-13 13:00:22,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 91.65217391304348) internal successors, (2108), 23 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:22,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 260.0) internal successors, (6240), 24 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:22,837 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 260.0) internal successors, (6240), 24 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:22,837 INFO L175 Difference]: Start difference. First operand has 371 places, 209 transitions, 2734 flow. Second operand 23 states and 2108 transitions. [2022-12-13 13:00:22,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 663 transitions, 11452 flow [2022-12-13 13:00:23,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 663 transitions, 10923 flow, removed 11 selfloop flow, removed 21 redundant places. [2022-12-13 13:00:23,176 INFO L231 Difference]: Finished difference. Result has 374 places, 211 transitions, 2716 flow [2022-12-13 13:00:23,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2716, PETRI_PLACES=374, PETRI_TRANSITIONS=211} [2022-12-13 13:00:23,176 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 337 predicate places. [2022-12-13 13:00:23,176 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 211 transitions, 2716 flow [2022-12-13 13:00:23,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 87.10909090909091) internal successors, (4791), 55 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:23,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:00:23,177 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:23,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-13 13:00:23,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-12-13 13:00:23,378 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:00:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:23,379 INFO L85 PathProgramCache]: Analyzing trace with hash 136641226, now seen corresponding path program 13 times [2022-12-13 13:00:23,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:23,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061903473] [2022-12-13 13:00:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:23,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:24,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:24,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061903473] [2022-12-13 13:00:24,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061903473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:24,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989121342] [2022-12-13 13:00:24,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:00:24,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:24,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:24,134 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:24,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-13 13:00:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:24,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 13:00:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:24,689 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 13 treesize of output 9 [2022-12-13 13:00:24,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:00:24,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:00:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:00:24,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:00:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:24,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:25,181 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3468 (Array Int Int)) (v_ArrVal_3469 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3468) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3469) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2022-12-13 13:00:25,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:00:25,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 13:00:25,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:00:25,193 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 81 treesize of output 77 [2022-12-13 13:00:25,196 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 62 treesize of output 54 [2022-12-13 13:00:25,199 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 28 treesize of output 24 [2022-12-13 13:00:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-12-13 13:00:25,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989121342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:25,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:25,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2022-12-13 13:00:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803186850] [2022-12-13 13:00:25,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:25,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 13:00:25,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 13:00:25,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2684, Unknown=11, NotChecked=104, Total=2970 [2022-12-13 13:00:25,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 13:00:25,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 211 transitions, 2716 flow. Second operand has 55 states, 55 states have (on average 87.10909090909091) internal successors, (4791), 55 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:25,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:00:25,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 13:00:25,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:00:30,384 INFO L130 PetriNetUnfolder]: 6012/11643 cut-off events. [2022-12-13 13:00:30,384 INFO L131 PetriNetUnfolder]: For 137514/137602 co-relation queries the response was YES. [2022-12-13 13:00:30,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95133 conditions, 11643 events. 6012/11643 cut-off events. For 137514/137602 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 95311 event pairs, 805 based on Foata normal form. 320/11963 useless extension candidates. Maximal degree in co-relation 95055. Up to 3461 conditions per place. [2022-12-13 13:00:30,479 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 631 selfloop transitions, 26 changer transitions 0/662 dead transitions. [2022-12-13 13:00:30,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 662 transitions, 10962 flow [2022-12-13 13:00:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 13:00:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 13:00:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2106 transitions. [2022-12-13 13:00:30,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3521739130434783 [2022-12-13 13:00:30,481 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2106 transitions. [2022-12-13 13:00:30,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2106 transitions. [2022-12-13 13:00:30,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:00:30,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2106 transitions. [2022-12-13 13:00:30,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 91.56521739130434) internal successors, (2106), 23 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:30,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 260.0) internal successors, (6240), 24 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:30,486 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 260.0) internal successors, (6240), 24 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:30,486 INFO L175 Difference]: Start difference. First operand has 374 places, 211 transitions, 2716 flow. Second operand 23 states and 2106 transitions. [2022-12-13 13:00:30,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 662 transitions, 10962 flow [2022-12-13 13:00:30,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 662 transitions, 10891 flow, removed 8 selfloop flow, removed 21 redundant places. [2022-12-13 13:00:30,813 INFO L231 Difference]: Finished difference. Result has 375 places, 210 transitions, 2671 flow [2022-12-13 13:00:30,813 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2671, PETRI_PLACES=375, PETRI_TRANSITIONS=210} [2022-12-13 13:00:30,813 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 338 predicate places. [2022-12-13 13:00:30,813 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 210 transitions, 2671 flow [2022-12-13 13:00:30,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 87.10909090909091) internal successors, (4791), 55 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:30,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:00:30,814 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2022-12-13 13:00:30,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-13 13:00:31,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-12-13 13:00:31,015 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:00:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1321221587, now seen corresponding path program 8 times [2022-12-13 13:00:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:31,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111395224] [2022-12-13 13:00:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111395224] [2022-12-13 13:00:31,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111395224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208674742] [2022-12-13 13:00:31,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:00:31,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:31,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:31,766 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:31,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-13 13:00:32,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:00:32,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:00:32,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 13:00:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:32,460 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 13 treesize of output 9 [2022-12-13 13:00:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:00:32,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:00:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:32,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:33,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:00:33,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 13:00:33,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:00:33,643 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 47 treesize of output 43 [2022-12-13 13:00:33,647 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 15 treesize of output 9 [2022-12-13 13:00:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:34,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208674742] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:34,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:34,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2022-12-13 13:00:34,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339678229] [2022-12-13 13:00:34,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:34,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 13:00:34,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 13:00:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=4176, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 13:00:40,361 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 260 [2022-12-13 13:00:40,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 210 transitions, 2671 flow. Second operand has 68 states, 68 states have (on average 95.05882352941177) internal successors, (6464), 68 states have internal predecessors, (6464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:40,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:00:40,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 260 [2022-12-13 13:00:40,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:00:54,067 INFO L130 PetriNetUnfolder]: 8336/15574 cut-off events. [2022-12-13 13:00:54,067 INFO L131 PetriNetUnfolder]: For 208455/209659 co-relation queries the response was YES. [2022-12-13 13:00:54,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133014 conditions, 15574 events. 8336/15574 cut-off events. For 208455/209659 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 128344 event pairs, 3730 based on Foata normal form. 1255/16828 useless extension candidates. Maximal degree in co-relation 132937. Up to 4863 conditions per place. [2022-12-13 13:00:54,273 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 398 selfloop transitions, 238 changer transitions 24/661 dead transitions. [2022-12-13 13:00:54,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 661 transitions, 10172 flow [2022-12-13 13:00:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-12-13 13:00:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-12-13 13:00:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 10142 transitions. [2022-12-13 13:00:54,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37507396449704145 [2022-12-13 13:00:54,281 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 10142 transitions. [2022-12-13 13:00:54,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 10142 transitions. [2022-12-13 13:00:54,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:00:54,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 10142 transitions. [2022-12-13 13:00:54,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 97.51923076923077) internal successors, (10142), 104 states have internal predecessors, (10142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:54,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 260.0) internal successors, (27300), 105 states have internal predecessors, (27300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:54,304 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 260.0) internal successors, (27300), 105 states have internal predecessors, (27300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:54,304 INFO L175 Difference]: Start difference. First operand has 375 places, 210 transitions, 2671 flow. Second operand 104 states and 10142 transitions. [2022-12-13 13:00:54,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 661 transitions, 10172 flow [2022-12-13 13:00:55,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 661 transitions, 9833 flow, removed 2 selfloop flow, removed 21 redundant places. [2022-12-13 13:00:55,018 INFO L231 Difference]: Finished difference. Result has 474 places, 304 transitions, 4657 flow [2022-12-13 13:00:55,018 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=4657, PETRI_PLACES=474, PETRI_TRANSITIONS=304} [2022-12-13 13:00:55,018 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 437 predicate places. [2022-12-13 13:00:55,018 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 304 transitions, 4657 flow [2022-12-13 13:00:55,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 95.05882352941177) internal successors, (6464), 68 states have internal predecessors, (6464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:00:55,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:00:55,019 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2022-12-13 13:00:55,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-12-13 13:00:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:55,220 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:00:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1321221586, now seen corresponding path program 13 times [2022-12-13 13:00:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:55,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859670249] [2022-12-13 13:00:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:55,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:55,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859670249] [2022-12-13 13:00:55,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859670249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:55,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368438115] [2022-12-13 13:00:55,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:00:55,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:55,932 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:55,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-13 13:00:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:56,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 13:00:56,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:56,560 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 13 treesize of output 9 [2022-12-13 13:00:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:00:56,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 13:00:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:56,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:57,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:00:57,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-12-13 13:00:57,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:00:57,237 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 37 treesize of output 33 [2022-12-13 13:00:57,240 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 7 treesize of output 3 [2022-12-13 13:00:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:57,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368438115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:57,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:57,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2022-12-13 13:00:57,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581933226] [2022-12-13 13:00:57,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:57,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-13 13:00:57,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-13 13:00:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4068, Unknown=11, NotChecked=0, Total=4290 [2022-12-13 13:01:01,893 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 260 [2022-12-13 13:01:01,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 304 transitions, 4657 flow. Second operand has 66 states, 66 states have (on average 102.06060606060606) internal successors, (6736), 66 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:01,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:01:01,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 260 [2022-12-13 13:01:01,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:01:06,538 INFO L130 PetriNetUnfolder]: 8287/15427 cut-off events. [2022-12-13 13:01:06,538 INFO L131 PetriNetUnfolder]: For 202498/203682 co-relation queries the response was YES. [2022-12-13 13:01:06,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133385 conditions, 15427 events. 8287/15427 cut-off events. For 202498/203682 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 124260 event pairs, 6594 based on Foata normal form. 1184/16606 useless extension candidates. Maximal degree in co-relation 133291. Up to 9768 conditions per place. [2022-12-13 13:01:06,706 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 216 selfloop transitions, 127 changer transitions 8/352 dead transitions. [2022-12-13 13:01:06,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 352 transitions, 5908 flow [2022-12-13 13:01:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 13:01:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 13:01:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2817 transitions. [2022-12-13 13:01:06,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4012820512820513 [2022-12-13 13:01:06,709 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2817 transitions. [2022-12-13 13:01:06,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2817 transitions. [2022-12-13 13:01:06,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:01:06,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2817 transitions. [2022-12-13 13:01:06,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 104.33333333333333) internal successors, (2817), 27 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:06,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 260.0) internal successors, (7280), 28 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:06,715 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 260.0) internal successors, (7280), 28 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:06,715 INFO L175 Difference]: Start difference. First operand has 474 places, 304 transitions, 4657 flow. Second operand 27 states and 2817 transitions. [2022-12-13 13:01:06,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 352 transitions, 5908 flow [2022-12-13 13:01:07,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 352 transitions, 5641 flow, removed 40 selfloop flow, removed 34 redundant places. [2022-12-13 13:01:07,519 INFO L231 Difference]: Finished difference. Result has 466 places, 302 transitions, 4592 flow [2022-12-13 13:01:07,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=4338, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4592, PETRI_PLACES=466, PETRI_TRANSITIONS=302} [2022-12-13 13:01:07,520 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 429 predicate places. [2022-12-13 13:01:07,520 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 302 transitions, 4592 flow [2022-12-13 13:01:07,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 102.06060606060606) internal successors, (6736), 66 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:07,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:01:07,520 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2022-12-13 13:01:07,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-12-13 13:01:07,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:07,722 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:01:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:01:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash 263994052, now seen corresponding path program 11 times [2022-12-13 13:01:07,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:01:07,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067575802] [2022-12-13 13:01:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:01:07,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:01:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:01:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:08,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:01:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067575802] [2022-12-13 13:01:08,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067575802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:01:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603160812] [2022-12-13 13:01:08,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:01:08,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:08,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:01:08,511 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:01:08,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-13 13:01:08,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 13:01:08,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:01:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 13:01:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:01:09,154 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 13 treesize of output 9 [2022-12-13 13:01:09,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:01:09,193 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 [2022-12-13 13:01:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:01:09,230 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 [2022-12-13 13:01:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:09,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:01:10,018 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3669 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3669) c_~A~0.base) (+ c_~A~0.offset 36)) 4294967296)) is different from false [2022-12-13 13:01:10,024 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3668 (Array Int Int)) (v_ArrVal_3669 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3668) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3669) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 36 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 13:01:10,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:01:10,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 13:01:10,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:01:10,036 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 71 treesize of output 67 [2022-12-13 13:01:10,039 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 54 treesize of output 46 [2022-12-13 13:01:10,043 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 24 treesize of output 20 [2022-12-13 13:01:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-12-13 13:01:10,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603160812] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:01:10,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:01:10,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2022-12-13 13:01:10,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103378281] [2022-12-13 13:01:10,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:01:10,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 13:01:10,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:01:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 13:01:10,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4487, Unknown=2, NotChecked=270, Total=4970 [2022-12-13 13:01:10,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 13:01:10,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 302 transitions, 4592 flow. Second operand has 71 states, 71 states have (on average 87.05633802816901) internal successors, (6181), 71 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:10,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:01:10,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 13:01:10,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:01:18,012 INFO L130 PetriNetUnfolder]: 8147/15195 cut-off events. [2022-12-13 13:01:18,012 INFO L131 PetriNetUnfolder]: For 209975/211136 co-relation queries the response was YES. [2022-12-13 13:01:18,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130539 conditions, 15195 events. 8147/15195 cut-off events. For 209975/211136 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 123409 event pairs, 4374 based on Foata normal form. 1252/16444 useless extension candidates. Maximal degree in co-relation 130444. Up to 4781 conditions per place. [2022-12-13 13:01:18,217 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 544 selfloop transitions, 75 changer transitions 8/628 dead transitions. [2022-12-13 13:01:18,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 628 transitions, 10145 flow [2022-12-13 13:01:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 13:01:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 13:01:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2418 transitions. [2022-12-13 13:01:18,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3576923076923077 [2022-12-13 13:01:18,220 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2418 transitions. [2022-12-13 13:01:18,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2418 transitions. [2022-12-13 13:01:18,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:01:18,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2418 transitions. [2022-12-13 13:01:18,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 93.0) internal successors, (2418), 26 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:18,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 260.0) internal successors, (7020), 27 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:18,225 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 260.0) internal successors, (7020), 27 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:18,225 INFO L175 Difference]: Start difference. First operand has 466 places, 302 transitions, 4592 flow. Second operand 26 states and 2418 transitions. [2022-12-13 13:01:18,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 628 transitions, 10145 flow [2022-12-13 13:01:19,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 628 transitions, 9963 flow, removed 4 selfloop flow, removed 24 redundant places. [2022-12-13 13:01:19,248 INFO L231 Difference]: Finished difference. Result has 469 places, 303 transitions, 4632 flow [2022-12-13 13:01:19,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=4412, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4632, PETRI_PLACES=469, PETRI_TRANSITIONS=303} [2022-12-13 13:01:19,248 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 432 predicate places. [2022-12-13 13:01:19,248 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 303 transitions, 4632 flow [2022-12-13 13:01:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 87.05633802816901) internal successors, (6181), 71 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:19,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:01:19,249 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:01:19,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-13 13:01:19,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:19,450 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:01:19,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:01:19,451 INFO L85 PathProgramCache]: Analyzing trace with hash -59085328, now seen corresponding path program 11 times [2022-12-13 13:01:19,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:01:19,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819057920] [2022-12-13 13:01:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:01:19,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:01:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:01:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:19,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:01:19,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819057920] [2022-12-13 13:01:19,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819057920] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:01:19,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406304097] [2022-12-13 13:01:19,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:01:19,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:19,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:01:19,786 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:01:19,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-13 13:01:20,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 13:01:20,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:01:20,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 13:01:20,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:01:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:20,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:01:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:20,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406304097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:01:20,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:01:20,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 52 [2022-12-13 13:01:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447734108] [2022-12-13 13:01:20,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:01:20,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 13:01:20,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:01:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 13:01:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2170, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 13:01:21,244 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 13:01:21,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 303 transitions, 4632 flow. Second operand has 54 states, 54 states have (on average 104.11111111111111) internal successors, (5622), 54 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:21,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:01:21,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 13:01:21,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:01:25,405 INFO L130 PetriNetUnfolder]: 8067/15125 cut-off events. [2022-12-13 13:01:25,405 INFO L131 PetriNetUnfolder]: For 175461/175499 co-relation queries the response was YES. [2022-12-13 13:01:25,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129328 conditions, 15125 events. 8067/15125 cut-off events. For 175461/175499 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 121784 event pairs, 2718 based on Foata normal form. 338/15463 useless extension candidates. Maximal degree in co-relation 129231. Up to 6385 conditions per place. [2022-12-13 13:01:25,625 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 248 selfloop transitions, 19 changer transitions 527/798 dead transitions. [2022-12-13 13:01:25,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 798 transitions, 13577 flow [2022-12-13 13:01:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 13:01:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 13:01:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3564 transitions. [2022-12-13 13:01:25,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4153846153846154 [2022-12-13 13:01:25,628 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3564 transitions. [2022-12-13 13:01:25,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3564 transitions. [2022-12-13 13:01:25,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:01:25,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3564 transitions. [2022-12-13 13:01:25,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 108.0) internal successors, (3564), 33 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:25,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 260.0) internal successors, (8840), 34 states have internal predecessors, (8840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:25,635 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 260.0) internal successors, (8840), 34 states have internal predecessors, (8840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:25,635 INFO L175 Difference]: Start difference. First operand has 469 places, 303 transitions, 4632 flow. Second operand 33 states and 3564 transitions. [2022-12-13 13:01:25,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 798 transitions, 13577 flow [2022-12-13 13:01:26,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 798 transitions, 13263 flow, removed 6 selfloop flow, removed 23 redundant places. [2022-12-13 13:01:26,345 INFO L231 Difference]: Finished difference. Result has 489 places, 240 transitions, 3641 flow [2022-12-13 13:01:26,346 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=4480, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3641, PETRI_PLACES=489, PETRI_TRANSITIONS=240} [2022-12-13 13:01:26,346 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 452 predicate places. [2022-12-13 13:01:26,346 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 240 transitions, 3641 flow [2022-12-13 13:01:26,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 104.11111111111111) internal successors, (5622), 54 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:26,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:01:26,346 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2022-12-13 13:01:26,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-12-13 13:01:26,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:26,548 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:01:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:01:26,548 INFO L85 PathProgramCache]: Analyzing trace with hash -723871299, now seen corresponding path program 10 times [2022-12-13 13:01:26,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:01:26,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622347015] [2022-12-13 13:01:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:01:26,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:01:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:01:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:27,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:01:27,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622347015] [2022-12-13 13:01:27,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622347015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:01:27,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569857805] [2022-12-13 13:01:27,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:01:27,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:27,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:01:27,607 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:01:27,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-13 13:01:28,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:01:28,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:01:28,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 13:01:28,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:01:28,405 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 13 treesize of output 9 [2022-12-13 13:01:28,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:01:28,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:01:28,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:01:28,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:01:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:28,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:01:29,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:01:29,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 13:01:29,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:01:29,395 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 81 treesize of output 77 [2022-12-13 13:01:29,398 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 62 treesize of output 54 [2022-12-13 13:01:29,401 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 28 treesize of output 24 [2022-12-13 13:01:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:29,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569857805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:01:29,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:01:29,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 68 [2022-12-13 13:01:29,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273951186] [2022-12-13 13:01:29,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:01:29,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-13 13:01:29,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:01:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-13 13:01:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=4585, Unknown=32, NotChecked=0, Total=4830 [2022-12-13 13:01:34,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 13:01:34,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 240 transitions, 3641 flow. Second operand has 70 states, 70 states have (on average 87.07142857142857) internal successors, (6095), 70 states have internal predecessors, (6095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:34,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:01:34,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 13:01:34,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:01:40,119 INFO L130 PetriNetUnfolder]: 5524/10171 cut-off events. [2022-12-13 13:01:40,119 INFO L131 PetriNetUnfolder]: For 192715/193463 co-relation queries the response was YES. [2022-12-13 13:01:40,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96731 conditions, 10171 events. 5524/10171 cut-off events. For 192715/193463 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 76569 event pairs, 2091 based on Foata normal form. 842/10999 useless extension candidates. Maximal degree in co-relation 96624. Up to 3302 conditions per place. [2022-12-13 13:01:40,221 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 458 selfloop transitions, 79 changer transitions 0/538 dead transitions. [2022-12-13 13:01:40,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 538 transitions, 9154 flow [2022-12-13 13:01:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 13:01:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 13:01:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2403 transitions. [2022-12-13 13:01:40,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3554733727810651 [2022-12-13 13:01:40,224 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2403 transitions. [2022-12-13 13:01:40,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2403 transitions. [2022-12-13 13:01:40,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:01:40,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2403 transitions. [2022-12-13 13:01:40,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 92.42307692307692) internal successors, (2403), 26 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:40,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 260.0) internal successors, (7020), 27 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:40,228 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 260.0) internal successors, (7020), 27 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:40,228 INFO L175 Difference]: Start difference. First operand has 489 places, 240 transitions, 3641 flow. Second operand 26 states and 2403 transitions. [2022-12-13 13:01:40,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 538 transitions, 9154 flow [2022-12-13 13:01:41,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 538 transitions, 8073 flow, removed 411 selfloop flow, removed 47 redundant places. [2022-12-13 13:01:41,475 INFO L231 Difference]: Finished difference. Result has 397 places, 239 transitions, 3521 flow [2022-12-13 13:01:41,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3521, PETRI_PLACES=397, PETRI_TRANSITIONS=239} [2022-12-13 13:01:41,476 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 360 predicate places. [2022-12-13 13:01:41,476 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 239 transitions, 3521 flow [2022-12-13 13:01:41,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 87.07142857142857) internal successors, (6095), 70 states have internal predecessors, (6095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:41,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:01:41,476 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2022-12-13 13:01:41,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-12-13 13:01:41,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:41,677 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:01:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:01:41,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1991807186, now seen corresponding path program 14 times [2022-12-13 13:01:41,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:01:41,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546605834] [2022-12-13 13:01:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:01:41,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:01:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:01:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:42,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:01:42,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546605834] [2022-12-13 13:01:42,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546605834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:01:42,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862729452] [2022-12-13 13:01:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:01:42,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:01:42,012 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:01:42,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-13 13:01:42,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:01:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:01:42,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 13:01:42,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:01:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:42,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:01:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:43,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862729452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:01:43,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:01:43,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 57 [2022-12-13 13:01:43,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277969103] [2022-12-13 13:01:43,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:01:43,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 13:01:43,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:01:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 13:01:43,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 13:01:43,533 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 260 [2022-12-13 13:01:43,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 239 transitions, 3521 flow. Second operand has 59 states, 59 states have (on average 104.0677966101695) internal successors, (6140), 59 states have internal predecessors, (6140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:43,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:01:43,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 260 [2022-12-13 13:01:43,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:01:47,351 INFO L130 PetriNetUnfolder]: 7070/13071 cut-off events. [2022-12-13 13:01:47,351 INFO L131 PetriNetUnfolder]: For 127976/129070 co-relation queries the response was YES. [2022-12-13 13:01:47,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109169 conditions, 13071 events. 7070/13071 cut-off events. For 127976/129070 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 104265 event pairs, 2425 based on Foata normal form. 1711/14782 useless extension candidates. Maximal degree in co-relation 109094. Up to 4119 conditions per place. [2022-12-13 13:01:47,481 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 497 selfloop transitions, 105 changer transitions 184/787 dead transitions. [2022-12-13 13:01:47,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 787 transitions, 11372 flow [2022-12-13 13:01:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 13:01:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 13:01:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3972 transitions. [2022-12-13 13:01:47,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42435897435897435 [2022-12-13 13:01:47,485 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3972 transitions. [2022-12-13 13:01:47,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3972 transitions. [2022-12-13 13:01:47,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:01:47,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3972 transitions. [2022-12-13 13:01:47,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 110.33333333333333) internal successors, (3972), 36 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:47,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 260.0) internal successors, (9620), 37 states have internal predecessors, (9620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:47,492 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 260.0) internal successors, (9620), 37 states have internal predecessors, (9620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:47,492 INFO L175 Difference]: Start difference. First operand has 397 places, 239 transitions, 3521 flow. Second operand 36 states and 3972 transitions. [2022-12-13 13:01:47,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 787 transitions, 11372 flow [2022-12-13 13:01:48,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 787 transitions, 11152 flow, removed 11 selfloop flow, removed 27 redundant places. [2022-12-13 13:01:48,094 INFO L231 Difference]: Finished difference. Result has 425 places, 256 transitions, 3912 flow [2022-12-13 13:01:48,094 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3912, PETRI_PLACES=425, PETRI_TRANSITIONS=256} [2022-12-13 13:01:48,094 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 388 predicate places. [2022-12-13 13:01:48,094 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 256 transitions, 3912 flow [2022-12-13 13:01:48,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 104.0677966101695) internal successors, (6140), 59 states have internal predecessors, (6140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:01:48,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:01:48,095 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:01:48,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-12-13 13:01:48,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:48,296 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:01:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:01:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1214309234, now seen corresponding path program 12 times [2022-12-13 13:01:48,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:01:48,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656256505] [2022-12-13 13:01:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:01:48,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:01:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:01:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:49,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:01:49,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656256505] [2022-12-13 13:01:49,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656256505] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:01:49,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174892330] [2022-12-13 13:01:49,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:01:49,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:49,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:01:49,062 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:01:49,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-12-13 13:01:49,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 13:01:49,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:01:49,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 13:01:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:01:50,089 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 [2022-12-13 13:01:50,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:01:50,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:01:50,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:01:50,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:01:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:50,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:01:51,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:01:51,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-12-13 13:01:51,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:01:51,585 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 165 treesize of output 153 [2022-12-13 13:01:51,590 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 136 treesize of output 122 [2022-12-13 13:01:51,594 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 94 [2022-12-13 13:01:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:01:52,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174892330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:01:52,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:01:52,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2022-12-13 13:01:52,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992070100] [2022-12-13 13:01:52,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:01:52,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 13:01:52,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:01:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 13:01:52,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=4508, Unknown=2, NotChecked=0, Total=4970 [2022-12-13 13:01:55,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:01:56,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:02:00,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:02:02,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:02:03,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 260 [2022-12-13 13:02:03,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 256 transitions, 3912 flow. Second operand has 71 states, 71 states have (on average 78.09859154929578) internal successors, (5545), 71 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:02:03,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:02:03,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 260 [2022-12-13 13:02:03,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:02:04,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:02:41,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:02:44,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:02:46,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:02:47,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:02:49,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:02:51,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:02:55,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:02:57,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:03:00,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:03:05,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:03:06,928 INFO L130 PetriNetUnfolder]: 11669/21437 cut-off events. [2022-12-13 13:03:06,928 INFO L131 PetriNetUnfolder]: For 364601/364833 co-relation queries the response was YES. [2022-12-13 13:03:07,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197471 conditions, 21437 events. 11669/21437 cut-off events. For 364601/364833 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 179861 event pairs, 406 based on Foata normal form. 864/22301 useless extension candidates. Maximal degree in co-relation 197377. Up to 6825 conditions per place. [2022-12-13 13:03:07,150 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 1597 selfloop transitions, 78 changer transitions 616/2296 dead transitions. [2022-12-13 13:03:07,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 2296 transitions, 47525 flow [2022-12-13 13:03:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-13 13:03:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-12-13 13:03:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 6798 transitions. [2022-12-13 13:03:07,155 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3227920227920228 [2022-12-13 13:03:07,155 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 6798 transitions. [2022-12-13 13:03:07,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 6798 transitions. [2022-12-13 13:03:07,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:03:07,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 6798 transitions. [2022-12-13 13:03:07,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 83.92592592592592) internal successors, (6798), 81 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:03:07,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 260.0) internal successors, (21320), 82 states have internal predecessors, (21320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:03:07,169 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 260.0) internal successors, (21320), 82 states have internal predecessors, (21320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:03:07,169 INFO L175 Difference]: Start difference. First operand has 425 places, 256 transitions, 3912 flow. Second operand 81 states and 6798 transitions. [2022-12-13 13:03:07,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 2296 transitions, 47525 flow [2022-12-13 13:03:08,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 2296 transitions, 46822 flow, removed 340 selfloop flow, removed 12 redundant places. [2022-12-13 13:03:08,327 INFO L231 Difference]: Finished difference. Result has 501 places, 301 transitions, 4729 flow [2022-12-13 13:03:08,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3849, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=4729, PETRI_PLACES=501, PETRI_TRANSITIONS=301} [2022-12-13 13:03:08,328 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 464 predicate places. [2022-12-13 13:03:08,328 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 301 transitions, 4729 flow [2022-12-13 13:03:08,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 78.09859154929578) internal successors, (5545), 71 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:03:08,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:03:08,329 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2022-12-13 13:03:08,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-12-13 13:03:08,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-12-13 13:03:08,529 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:03:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:03:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1029765548, now seen corresponding path program 15 times [2022-12-13 13:03:08,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:03:08,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271594626] [2022-12-13 13:03:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:03:08,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:03:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:03:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:03:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:03:09,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271594626] [2022-12-13 13:03:09,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271594626] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:03:09,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716035002] [2022-12-13 13:03:09,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:03:09,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:03:09,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:03:09,420 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:03:09,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-13 13:03:10,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 13:03:10,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:03:10,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 13:03:10,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:03:10,479 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 [2022-12-13 13:03:10,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:03:10,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:03:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:03:11,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:03:12,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:03:12,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 13:03:12,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:03:12,273 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 41 treesize of output 37 [2022-12-13 13:03:12,277 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 13 treesize of output 7 [2022-12-13 13:03:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:03:13,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716035002] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:03:13,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:03:13,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 72 [2022-12-13 13:03:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413329023] [2022-12-13 13:03:13,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:03:13,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-12-13 13:03:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:03:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-12-13 13:03:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=4868, Unknown=0, NotChecked=0, Total=5402 [2022-12-13 13:03:15,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:03:21,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:03:23,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 260 [2022-12-13 13:03:23,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 301 transitions, 4729 flow. Second operand has 74 states, 74 states have (on average 93.05405405405405) internal successors, (6886), 74 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:03:23,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:03:23,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 260 [2022-12-13 13:03:23,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:03:25,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:03:30,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:03:37,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:03:41,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:03:46,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:03:48,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:03:51,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:03:54,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:03:56,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:03:59,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:04:07,469 INFO L130 PetriNetUnfolder]: 11211/19908 cut-off events. [2022-12-13 13:04:07,469 INFO L131 PetriNetUnfolder]: For 492518/493978 co-relation queries the response was YES. [2022-12-13 13:04:07,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203611 conditions, 19908 events. 11211/19908 cut-off events. For 492518/493978 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 160667 event pairs, 4108 based on Foata normal form. 1515/21383 useless extension candidates. Maximal degree in co-relation 203509. Up to 7319 conditions per place. [2022-12-13 13:04:07,743 INFO L137 encePairwiseOnDemand]: 250/260 looper letters, 726 selfloop transitions, 280 changer transitions 33/1042 dead transitions. [2022-12-13 13:04:07,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1042 transitions, 18312 flow [2022-12-13 13:04:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-12-13 13:04:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2022-12-13 13:04:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 12705 transitions. [2022-12-13 13:04:07,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3674089068825911 [2022-12-13 13:04:07,752 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 12705 transitions. [2022-12-13 13:04:07,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 12705 transitions. [2022-12-13 13:04:07,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:07,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 12705 transitions. [2022-12-13 13:04:07,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 95.52631578947368) internal successors, (12705), 133 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 260.0) internal successors, (34840), 134 states have internal predecessors, (34840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,777 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 260.0) internal successors, (34840), 134 states have internal predecessors, (34840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,778 INFO L175 Difference]: Start difference. First operand has 501 places, 301 transitions, 4729 flow. Second operand 133 states and 12705 transitions. [2022-12-13 13:04:07,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1042 transitions, 18312 flow [2022-12-13 13:04:09,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1042 transitions, 16866 flow, removed 181 selfloop flow, removed 28 redundant places. [2022-12-13 13:04:09,816 INFO L231 Difference]: Finished difference. Result has 613 places, 388 transitions, 6724 flow [2022-12-13 13:04:09,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=4438, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=6724, PETRI_PLACES=613, PETRI_TRANSITIONS=388} [2022-12-13 13:04:09,816 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 576 predicate places. [2022-12-13 13:04:09,816 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 388 transitions, 6724 flow [2022-12-13 13:04:09,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 93.05405405405405) internal successors, (6886), 74 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:09,817 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:09,817 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:09,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-12-13 13:04:10,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-12-13 13:04:10,018 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:04:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:10,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1214309235, now seen corresponding path program 14 times [2022-12-13 13:04:10,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:10,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497557315] [2022-12-13 13:04:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:10,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:10,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:10,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497557315] [2022-12-13 13:04:10,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497557315] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:10,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6891544] [2022-12-13 13:04:10,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:04:10,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:10,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:10,811 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:10,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-12-13 13:04:11,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:04:11,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 13:04:11,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:11,547 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 13 treesize of output 9 [2022-12-13 13:04:11,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:04:11,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:04:11,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:04:11,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:04:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:12,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:13,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:13,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-12-13 13:04:13,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:13,038 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 89 treesize of output 85 [2022-12-13 13:04:13,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-12-13 13:04:13,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-12-13 13:04:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:14,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6891544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:14,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:14,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2022-12-13 13:04:14,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770914870] [2022-12-13 13:04:14,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:14,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 13:04:14,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 13:04:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=4576, Unknown=2, NotChecked=0, Total=4970 [2022-12-13 13:04:20,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 260 [2022-12-13 13:04:20,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 388 transitions, 6724 flow. Second operand has 71 states, 71 states have (on average 78.09859154929578) internal successors, (5545), 71 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:20,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:20,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 260 [2022-12-13 13:04:20,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:40,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:44,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:47,854 INFO L130 PetriNetUnfolder]: 10802/19534 cut-off events. [2022-12-13 13:04:47,854 INFO L131 PetriNetUnfolder]: For 442649/442867 co-relation queries the response was YES. [2022-12-13 13:04:48,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192061 conditions, 19534 events. 10802/19534 cut-off events. For 442649/442867 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 157984 event pairs, 440 based on Foata normal form. 898/20428 useless extension candidates. Maximal degree in co-relation 191944. Up to 7323 conditions per place. [2022-12-13 13:04:48,081 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 1488 selfloop transitions, 62 changer transitions 910/2464 dead transitions. [2022-12-13 13:04:48,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 2464 transitions, 58544 flow [2022-12-13 13:04:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-13 13:04:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-12-13 13:04:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5888 transitions. [2022-12-13 13:04:48,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32351648351648354 [2022-12-13 13:04:48,086 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5888 transitions. [2022-12-13 13:04:48,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5888 transitions. [2022-12-13 13:04:48,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:48,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5888 transitions. [2022-12-13 13:04:48,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 84.11428571428571) internal successors, (5888), 70 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:48,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 260.0) internal successors, (18460), 71 states have internal predecessors, (18460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:48,098 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 260.0) internal successors, (18460), 71 states have internal predecessors, (18460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:48,098 INFO L175 Difference]: Start difference. First operand has 613 places, 388 transitions, 6724 flow. Second operand 70 states and 5888 transitions. [2022-12-13 13:04:48,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 2464 transitions, 58544 flow [2022-12-13 13:04:49,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 2464 transitions, 56653 flow, removed 637 selfloop flow, removed 83 redundant places. [2022-12-13 13:04:49,686 INFO L231 Difference]: Finished difference. Result has 599 places, 282 transitions, 4554 flow [2022-12-13 13:04:49,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=6095, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=4554, PETRI_PLACES=599, PETRI_TRANSITIONS=282} [2022-12-13 13:04:49,687 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 562 predicate places. [2022-12-13 13:04:49,687 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 282 transitions, 4554 flow [2022-12-13 13:04:49,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 78.09859154929578) internal successors, (5545), 71 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:49,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:49,688 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 10, 1, 1, 1, 1, 1] [2022-12-13 13:04:49,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-12-13 13:04:49,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-12-13 13:04:49,889 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:04:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:49,890 INFO L85 PathProgramCache]: Analyzing trace with hash -209239791, now seen corresponding path program 9 times [2022-12-13 13:04:49,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:49,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692215984] [2022-12-13 13:04:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:49,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:50,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692215984] [2022-12-13 13:04:50,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692215984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125856028] [2022-12-13 13:04:50,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:04:50,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:50,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:50,890 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:50,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-12-13 13:04:51,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 13:04:51,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:51,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-13 13:04:51,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:51,982 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 13 treesize of output 9 [2022-12-13 13:04:52,028 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 13:04:52,028 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 26 [2022-12-13 13:04:52,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:04:52,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:04:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:52,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:53,456 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 13:04:53,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2022-12-13 13:04:53,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:53,463 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 43 treesize of output 39 [2022-12-13 13:04:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:53,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125856028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:53,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:53,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-13 13:04:53,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039802373] [2022-12-13 13:04:53,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:53,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 13:04:53,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:53,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 13:04:53,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=5593, Unknown=27, NotChecked=0, Total=5852 [2022-12-13 13:05:02,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 260 [2022-12-13 13:05:02,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 282 transitions, 4554 flow. Second operand has 77 states, 77 states have (on average 90.05194805194805) internal successors, (6934), 77 states have internal predecessors, (6934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:02,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:02,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 260 [2022-12-13 13:05:02,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:09,172 INFO L130 PetriNetUnfolder]: 8393/15164 cut-off events. [2022-12-13 13:05:09,172 INFO L131 PetriNetUnfolder]: For 356640/357391 co-relation queries the response was YES. [2022-12-13 13:05:09,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163492 conditions, 15164 events. 8393/15164 cut-off events. For 356640/357391 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 116454 event pairs, 6595 based on Foata normal form. 747/15845 useless extension candidates. Maximal degree in co-relation 163374. Up to 14246 conditions per place. [2022-12-13 13:05:09,325 INFO L137 encePairwiseOnDemand]: 251/260 looper letters, 194 selfloop transitions, 135 changer transitions 0/331 dead transitions. [2022-12-13 13:05:09,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 331 transitions, 6031 flow [2022-12-13 13:05:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 13:05:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 13:05:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2662 transitions. [2022-12-13 13:05:09,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3530503978779841 [2022-12-13 13:05:09,327 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2662 transitions. [2022-12-13 13:05:09,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2662 transitions. [2022-12-13 13:05:09,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:09,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2662 transitions. [2022-12-13 13:05:09,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 91.79310344827586) internal successors, (2662), 29 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:09,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 260.0) internal successors, (7800), 30 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:09,332 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 260.0) internal successors, (7800), 30 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:09,332 INFO L175 Difference]: Start difference. First operand has 599 places, 282 transitions, 4554 flow. Second operand 29 states and 2662 transitions. [2022-12-13 13:05:09,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 331 transitions, 6031 flow [2022-12-13 13:05:12,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 331 transitions, 5554 flow, removed 124 selfloop flow, removed 69 redundant places. [2022-12-13 13:05:12,780 INFO L231 Difference]: Finished difference. Result has 476 places, 279 transitions, 4429 flow [2022-12-13 13:05:12,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4429, PETRI_PLACES=476, PETRI_TRANSITIONS=279} [2022-12-13 13:05:12,780 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 439 predicate places. [2022-12-13 13:05:12,780 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 279 transitions, 4429 flow [2022-12-13 13:05:12,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 90.05194805194805) internal successors, (6934), 77 states have internal predecessors, (6934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:12,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:12,781 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:12,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-12-13 13:05:12,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-12-13 13:05:12,982 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:05:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:12,983 INFO L85 PathProgramCache]: Analyzing trace with hash 414410169, now seen corresponding path program 11 times [2022-12-13 13:05:12,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:12,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49227944] [2022-12-13 13:05:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:12,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:05:14,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:14,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49227944] [2022-12-13 13:05:14,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49227944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:14,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499922419] [2022-12-13 13:05:14,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:05:14,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:14,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:14,043 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:14,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-12-13 13:05:14,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 13:05:14,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 13:05:14,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:14,817 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 13 treesize of output 9 [2022-12-13 13:05:14,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:05:14,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:05:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:05:14,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:05:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:05:15,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:15,757 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4221 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4221) c_~A~0.base) (+ c_~A~0.offset 40)) 9223372039002259456))) is different from false [2022-12-13 13:05:15,763 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4220 (Array Int Int)) (v_ArrVal_4221 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_4220) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4221) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 40 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 13:05:15,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:05:15,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 13:05:15,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:05:15,776 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 159 treesize of output 149 [2022-12-13 13:05:15,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 118 [2022-12-13 13:05:15,783 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 [2022-12-13 13:05:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2022-12-13 13:05:16,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499922419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:16,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:16,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2022-12-13 13:05:16,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170311715] [2022-12-13 13:05:16,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:16,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-13 13:05:16,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:16,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-13 13:05:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=5022, Unknown=2, NotChecked=286, Total=5550 [2022-12-13 13:05:16,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 260 [2022-12-13 13:05:16,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 279 transitions, 4429 flow. Second operand has 75 states, 75 states have (on average 87.06666666666666) internal successors, (6530), 75 states have internal predecessors, (6530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:16,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:16,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 260 [2022-12-13 13:05:16,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:24,222 INFO L130 PetriNetUnfolder]: 9291/16770 cut-off events. [2022-12-13 13:05:24,222 INFO L131 PetriNetUnfolder]: For 184549/185458 co-relation queries the response was YES. [2022-12-13 13:05:24,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164716 conditions, 16770 events. 9291/16770 cut-off events. For 184549/185458 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 133424 event pairs, 2870 based on Foata normal form. 1203/17955 useless extension candidates. Maximal degree in co-relation 164633. Up to 5785 conditions per place. [2022-12-13 13:05:24,369 INFO L137 encePairwiseOnDemand]: 252/260 looper letters, 864 selfloop transitions, 81 changer transitions 0/947 dead transitions. [2022-12-13 13:05:24,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 947 transitions, 15309 flow [2022-12-13 13:05:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 13:05:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 13:05:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2590 transitions. [2022-12-13 13:05:24,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3557692307692308 [2022-12-13 13:05:24,372 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2590 transitions. [2022-12-13 13:05:24,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2590 transitions. [2022-12-13 13:05:24,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:24,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2590 transitions. [2022-12-13 13:05:24,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 92.5) internal successors, (2590), 28 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:24,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 260.0) internal successors, (7540), 29 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:24,377 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 260.0) internal successors, (7540), 29 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:24,377 INFO L175 Difference]: Start difference. First operand has 476 places, 279 transitions, 4429 flow. Second operand 28 states and 2590 transitions. [2022-12-13 13:05:24,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 947 transitions, 15309 flow [2022-12-13 13:05:25,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 947 transitions, 15076 flow, removed 0 selfloop flow, removed 25 redundant places. [2022-12-13 13:05:25,514 INFO L231 Difference]: Finished difference. Result has 480 places, 282 transitions, 4462 flow [2022-12-13 13:05:25,514 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4462, PETRI_PLACES=480, PETRI_TRANSITIONS=282} [2022-12-13 13:05:25,515 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 443 predicate places. [2022-12-13 13:05:25,515 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 282 transitions, 4462 flow [2022-12-13 13:05:25,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 87.06666666666666) internal successors, (6530), 75 states have internal predecessors, (6530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:25,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:25,515 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:25,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-12-13 13:05:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:25,716 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 13:05:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash -144644608, now seen corresponding path program 12 times [2022-12-13 13:05:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:25,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735553659] [2022-12-13 13:05:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:05:26,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:26,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735553659] [2022-12-13 13:05:26,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735553659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:26,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40620223] [2022-12-13 13:05:26,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:05:26,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:26,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:26,756 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:26,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8708a568-6a3a-4ee5-b8a6-20728b8d3e34/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-12-13 13:05:27,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 13:05:27,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 13:05:27,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:28,448 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 13:05:28,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:05:28,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:05:28,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:05:28,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:05:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:05:29,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:30,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:05:30,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 13:05:30,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:05:30,647 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 79 treesize of output 75 [2022-12-13 13:05:30,651 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 60 treesize of output 48 [2022-12-13 13:05:30,656 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 26 treesize of output 20