./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- 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-e04fb08 [2022-11-16 11:31:16,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:31:16,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:31:16,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:31:16,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:31:16,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:31:16,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:31:16,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:31:16,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:31:16,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:31:16,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:31:16,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:31:16,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:31:16,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:31:16,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:31:16,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:31:16,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:31:16,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:31:16,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:31:16,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:31:16,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:31:16,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:31:16,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:31:16,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:31:16,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:31:16,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:31:16,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:31:16,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:31:16,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:31:16,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:31:16,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:31:16,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:31:16,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:31:16,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:31:16,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:31:16,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:31:16,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:31:16,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:31:16,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:31:16,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:31:16,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:31:16,262 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:31:16,303 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:31:16,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:31:16,304 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:31:16,304 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:31:16,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:31:16,305 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:31:16,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:31:16,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:31:16,307 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:31:16,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:31:16,308 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:31:16,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:31:16,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:31:16,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:31:16,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:31:16,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:31:16,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:31:16,309 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:31:16,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:31:16,310 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:31:16,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:31:16,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:31:16,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:31:16,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:31:16,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:31:16,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:31:16,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:31:16,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:31:16,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:31:16,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:31:16,312 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:31:16,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:31:16,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:31:16,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-11-16 11:31:16,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:31:16,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:31:16,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:31:16,685 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:31:16,685 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:31:16,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-16 11:31:16,762 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/data/d75eb4c76/3a87e12a3bb64d229199e911c94c481c/FLAG7e4d3d74c [2022-11-16 11:31:17,260 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:31:17,262 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-16 11:31:17,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/data/d75eb4c76/3a87e12a3bb64d229199e911c94c481c/FLAG7e4d3d74c [2022-11-16 11:31:17,603 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/data/d75eb4c76/3a87e12a3bb64d229199e911c94c481c [2022-11-16 11:31:17,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:31:17,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:31:17,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:31:17,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:31:17,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:31:17,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:17,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c024b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17, skipping insertion in model container [2022-11-16 11:31:17,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:17,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:31:17,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:31:17,874 WARN L229 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_9950d224-2933-4017-a3b0-1f0924189322/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-16 11:31:17,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:31:17,896 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:31:17,937 WARN L229 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_9950d224-2933-4017-a3b0-1f0924189322/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-16 11:31:17,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:31:17,956 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:31:17,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17 WrapperNode [2022-11-16 11:31:17,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:31:17,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:31:17,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:31:17,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:31:17,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:17,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,018 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-16 11:31:18,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:31:18,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:31:18,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:31:18,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:31:18,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,058 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:31:18,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:31:18,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:31:18,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:31:18,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (1/1) ... [2022-11-16 11:31:18,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:31:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:18,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:31:18,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:31:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:31:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:31:18,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:31:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:31:18,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:31:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:31:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:31:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:31:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:31:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:31:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:31:18,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:31:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:31:18,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:31:18,162 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:31:18,262 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:31:18,265 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:31:18,521 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:31:18,596 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:31:18,596 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:31:18,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:31:18 BoogieIcfgContainer [2022-11-16 11:31:18,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:31:18,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:31:18,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:31:18,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:31:18,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:31:17" (1/3) ... [2022-11-16 11:31:18,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2a21ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:31:18, skipping insertion in model container [2022-11-16 11:31:18,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:17" (2/3) ... [2022-11-16 11:31:18,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2a21ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:31:18, skipping insertion in model container [2022-11-16 11:31:18,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:31:18" (3/3) ... [2022-11-16 11:31:18,614 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-11-16 11:31:18,622 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:31:18,633 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:31:18,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:31:18,634 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:31:18,721 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:31:18,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-11-16 11:31:18,804 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2022-11-16 11:31:18,804 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:31:18,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-16 11:31:18,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-11-16 11:31:18,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-11-16 11:31:18,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:31:18,850 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;@2fb93c18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:31:18,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:31:18,877 INFO L130 PetriNetUnfolder]: 6/76 cut-off events. [2022-11-16 11:31:18,877 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:31:18,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:18,879 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:18,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:31:18,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1497935551, now seen corresponding path program 1 times [2022-11-16 11:31:18,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983657070] [2022-11-16 11:31:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:19,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:19,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983657070] [2022-11-16 11:31:19,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983657070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:19,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:19,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:31:19,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941507793] [2022-11-16 11:31:19,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:19,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:31:19,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:31:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:31:19,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2022-11-16 11:31:19,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:19,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:19,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2022-11-16 11:31:19,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:19,371 INFO L130 PetriNetUnfolder]: 16/112 cut-off events. [2022-11-16 11:31:19,371 INFO L131 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-11-16 11:31:19,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 5 based on Foata normal form. 14/115 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2022-11-16 11:31:19,374 INFO L137 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2022-11-16 11:31:19,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2022-11-16 11:31:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:31:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:31:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-11-16 11:31:19,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2022-11-16 11:31:19,393 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-11-16 11:31:19,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-11-16 11:31:19,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:19,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-11-16 11:31:19,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:19,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:19,413 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:19,415 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2022-11-16 11:31:19,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2022-11-16 11:31:19,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:31:19,424 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2022-11-16 11:31:19,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-11-16 11:31:19,436 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2022-11-16 11:31:19,437 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2022-11-16 11:31:19,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:19,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:19,439 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:19,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:31:19,440 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:31:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash 855667735, now seen corresponding path program 1 times [2022-11-16 11:31:19,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:19,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016580271] [2022-11-16 11:31:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:19,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:20,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:20,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016580271] [2022-11-16 11:31:20,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016580271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:20,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:20,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:31:20,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835938858] [2022-11-16 11:31:20,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:20,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:31:20,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:31:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:20,196 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-16 11:31:20,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:20,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:20,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-16 11:31:20,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:20,425 INFO L130 PetriNetUnfolder]: 44/170 cut-off events. [2022-11-16 11:31:20,425 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:31:20,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 170 events. 44/170 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 420 event pairs, 10 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 274. Up to 49 conditions per place. [2022-11-16 11:31:20,428 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 33 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-11-16 11:31:20,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 259 flow [2022-11-16 11:31:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:31:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:31:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2022-11-16 11:31:20,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7159090909090909 [2022-11-16 11:31:20,432 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2022-11-16 11:31:20,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2022-11-16 11:31:20,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:20,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2022-11-16 11:31:20,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:20,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:20,438 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:20,438 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 7 states and 441 transitions. [2022-11-16 11:31:20,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 259 flow [2022-11-16 11:31:20,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:31:20,441 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 187 flow [2022-11-16 11:31:20,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=187, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2022-11-16 11:31:20,443 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2022-11-16 11:31:20,443 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 187 flow [2022-11-16 11:31:20,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:20,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:20,444 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:20,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:31:20,444 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:31:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash 251417684, now seen corresponding path program 1 times [2022-11-16 11:31:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:20,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531536508] [2022-11-16 11:31:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:20,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:21,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531536508] [2022-11-16 11:31:21,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531536508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:21,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893254479] [2022-11-16 11:31:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:21,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:21,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:21,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:21,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:31:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:31:22,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:23,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:24,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893254479] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:24,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:24,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2022-11-16 11:31:24,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673980293] [2022-11-16 11:31:24,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:24,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:31:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:24,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:31:24,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:31:24,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-16 11:31:24,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 187 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:24,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:24,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-16 11:31:24,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:26,172 INFO L130 PetriNetUnfolder]: 210/631 cut-off events. [2022-11-16 11:31:26,172 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-11-16 11:31:26,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303 conditions, 631 events. 210/631 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3206 event pairs, 31 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 1296. Up to 99 conditions per place. [2022-11-16 11:31:26,184 INFO L137 encePairwiseOnDemand]: 67/88 looper letters, 92 selfloop transitions, 57 changer transitions 16/204 dead transitions. [2022-11-16 11:31:26,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 204 transitions, 915 flow [2022-11-16 11:31:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:31:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 11:31:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1525 transitions. [2022-11-16 11:31:26,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6189123376623377 [2022-11-16 11:31:26,193 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1525 transitions. [2022-11-16 11:31:26,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1525 transitions. [2022-11-16 11:31:26,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:26,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1525 transitions. [2022-11-16 11:31:26,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.464285714285715) internal successors, (1525), 28 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:26,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:26,208 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:26,209 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 187 flow. Second operand 28 states and 1525 transitions. [2022-11-16 11:31:26,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 204 transitions, 915 flow [2022-11-16 11:31:26,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 204 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:31:26,219 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 521 flow [2022-11-16 11:31:26,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=521, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2022-11-16 11:31:26,222 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 37 predicate places. [2022-11-16 11:31:26,222 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 521 flow [2022-11-16 11:31:26,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:26,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:26,224 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:26,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:31:26,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-16 11:31:26,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:31:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1002934387, now seen corresponding path program 1 times [2022-11-16 11:31:26,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:26,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962913575] [2022-11-16 11:31:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:27,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962913575] [2022-11-16 11:31:27,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962913575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:27,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688582516] [2022-11-16 11:31:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:27,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:27,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:27,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:27,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:31:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:27,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:31:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:29,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:32,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688582516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:32,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:31:32,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-16 11:31:32,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156978795] [2022-11-16 11:31:32,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:32,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:31:32,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:31:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:31:32,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-11-16 11:31:32,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 521 flow. Second operand has 37 states, 37 states have (on average 52.91891891891892) internal successors, (1958), 37 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:32,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:32,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-11-16 11:31:32,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:49,165 INFO L130 PetriNetUnfolder]: 504/1809 cut-off events. [2022-11-16 11:31:49,165 INFO L131 PetriNetUnfolder]: For 2158/2183 co-relation queries the response was YES. [2022-11-16 11:31:49,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4704 conditions, 1809 events. 504/1809 cut-off events. For 2158/2183 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14562 event pairs, 10 based on Foata normal form. 29/1832 useless extension candidates. Maximal degree in co-relation 4688. Up to 168 conditions per place. [2022-11-16 11:31:49,179 INFO L137 encePairwiseOnDemand]: 68/88 looper letters, 217 selfloop transitions, 185 changer transitions 133/583 dead transitions. [2022-11-16 11:31:49,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 583 transitions, 3865 flow [2022-11-16 11:31:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-16 11:31:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-11-16 11:31:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 5779 transitions. [2022-11-16 11:31:49,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6254329004329005 [2022-11-16 11:31:49,193 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 5779 transitions. [2022-11-16 11:31:49,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 5779 transitions. [2022-11-16 11:31:49,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:49,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 5779 transitions. [2022-11-16 11:31:49,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 55.03809523809524) internal successors, (5779), 105 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:49,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 88.0) internal successors, (9328), 106 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:49,231 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 88.0) internal successors, (9328), 106 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:49,231 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 521 flow. Second operand 105 states and 5779 transitions. [2022-11-16 11:31:49,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 583 transitions, 3865 flow [2022-11-16 11:31:49,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 583 transitions, 3681 flow, removed 86 selfloop flow, removed 9 redundant places. [2022-11-16 11:31:49,262 INFO L231 Difference]: Finished difference. Result has 265 places, 284 transitions, 2200 flow [2022-11-16 11:31:49,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=2200, PETRI_PLACES=265, PETRI_TRANSITIONS=284} [2022-11-16 11:31:49,263 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 187 predicate places. [2022-11-16 11:31:49,264 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 284 transitions, 2200 flow [2022-11-16 11:31:49,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.91891891891892) internal successors, (1958), 37 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:49,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:49,265 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:49,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:31:49,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:49,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:31:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:49,472 INFO L85 PathProgramCache]: Analyzing trace with hash -295658065, now seen corresponding path program 2 times [2022-11-16 11:31:49,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:49,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859580771] [2022-11-16 11:31:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:49,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:49,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:49,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859580771] [2022-11-16 11:31:49,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859580771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:49,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:49,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:31:49,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650164724] [2022-11-16 11:31:49,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:49,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:49,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:49,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-16 11:31:49,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 284 transitions, 2200 flow. Second operand has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 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) [2022-11-16 11:31:49,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:49,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-16 11:31:49,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:50,524 INFO L130 PetriNetUnfolder]: 849/2196 cut-off events. [2022-11-16 11:31:50,526 INFO L131 PetriNetUnfolder]: For 11078/11078 co-relation queries the response was YES. [2022-11-16 11:31:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8890 conditions, 2196 events. 849/2196 cut-off events. For 11078/11078 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15822 event pairs, 22 based on Foata normal form. 31/2218 useless extension candidates. Maximal degree in co-relation 8819. Up to 444 conditions per place. [2022-11-16 11:31:50,563 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 440 selfloop transitions, 142 changer transitions 0/634 dead transitions. [2022-11-16 11:31:50,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 634 transitions, 6370 flow [2022-11-16 11:31:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:31:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:31:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2022-11-16 11:31:50,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2022-11-16 11:31:50,565 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2022-11-16 11:31:50,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2022-11-16 11:31:50,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:31:50,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2022-11-16 11:31:50,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:50,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:50,568 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:50,568 INFO L175 Difference]: Start difference. First operand has 265 places, 284 transitions, 2200 flow. Second operand 7 states and 496 transitions. [2022-11-16 11:31:50,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 634 transitions, 6370 flow [2022-11-16 11:31:50,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 634 transitions, 5754 flow, removed 300 selfloop flow, removed 50 redundant places. [2022-11-16 11:31:50,654 INFO L231 Difference]: Finished difference. Result has 174 places, 372 transitions, 3281 flow [2022-11-16 11:31:50,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3281, PETRI_PLACES=174, PETRI_TRANSITIONS=372} [2022-11-16 11:31:50,657 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 96 predicate places. [2022-11-16 11:31:50,657 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 372 transitions, 3281 flow [2022-11-16 11:31:50,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 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) [2022-11-16 11:31:50,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:31:50,658 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:50,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:31:50,658 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:31:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:50,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1117041980, now seen corresponding path program 2 times [2022-11-16 11:31:50,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:50,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834792164] [2022-11-16 11:31:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:50,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:52,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:52,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834792164] [2022-11-16 11:31:52,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834792164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:52,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734431522] [2022-11-16 11:31:52,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:31:52,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:52,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:52,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:52,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:31:52,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:31:52,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:52,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:31:52,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:54,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:59,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734431522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:59,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:31:59,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 36 [2022-11-16 11:31:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745353347] [2022-11-16 11:31:59,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:59,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:31:59,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:59,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:31:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:31:59,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-11-16 11:31:59,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 372 transitions, 3281 flow. Second operand has 36 states, 36 states have (on average 53.22222222222222) internal successors, (1916), 36 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:59,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:31:59,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-11-16 11:31:59,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:32:06,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:32:23,980 INFO L130 PetriNetUnfolder]: 1169/3280 cut-off events. [2022-11-16 11:32:23,980 INFO L131 PetriNetUnfolder]: For 12271/12303 co-relation queries the response was YES. [2022-11-16 11:32:24,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13505 conditions, 3280 events. 1169/3280 cut-off events. For 12271/12303 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 27114 event pairs, 19 based on Foata normal form. 25/3293 useless extension candidates. Maximal degree in co-relation 13473. Up to 705 conditions per place. [2022-11-16 11:32:24,067 INFO L137 encePairwiseOnDemand]: 67/88 looper letters, 398 selfloop transitions, 355 changer transitions 60/862 dead transitions. [2022-11-16 11:32:24,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 862 transitions, 9188 flow [2022-11-16 11:32:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-16 11:32:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-16 11:32:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4285 transitions. [2022-11-16 11:32:24,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6242715617715617 [2022-11-16 11:32:24,078 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4285 transitions. [2022-11-16 11:32:24,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4285 transitions. [2022-11-16 11:32:24,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:32:24,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4285 transitions. [2022-11-16 11:32:24,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 54.93589743589744) internal successors, (4285), 78 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) [2022-11-16 11:32:24,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 88.0) internal successors, (6952), 79 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:24,103 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 88.0) internal successors, (6952), 79 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:24,103 INFO L175 Difference]: Start difference. First operand has 174 places, 372 transitions, 3281 flow. Second operand 78 states and 4285 transitions. [2022-11-16 11:32:24,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 862 transitions, 9188 flow [2022-11-16 11:32:24,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 862 transitions, 9110 flow, removed 39 selfloop flow, removed 0 redundant places. [2022-11-16 11:32:24,224 INFO L231 Difference]: Finished difference. Result has 292 places, 611 transitions, 7194 flow [2022-11-16 11:32:24,224 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=7194, PETRI_PLACES=292, PETRI_TRANSITIONS=611} [2022-11-16 11:32:24,225 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 214 predicate places. [2022-11-16 11:32:24,225 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 611 transitions, 7194 flow [2022-11-16 11:32:24,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.22222222222222) internal successors, (1916), 36 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:24,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:32:24,227 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:24,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:32:24,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:32:24,438 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:32:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 401188092, now seen corresponding path program 3 times [2022-11-16 11:32:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:32:24,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671442345] [2022-11-16 11:32:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:32:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:32:26,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:32:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671442345] [2022-11-16 11:32:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671442345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:32:26,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698652985] [2022-11-16 11:32:26,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:32:26,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:32:26,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:32:26,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:32:26,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:32:27,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:32:27,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:32:27,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:32:27,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:32:28,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:32:33,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698652985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:33,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:32:33,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 35 [2022-11-16 11:32:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931146450] [2022-11-16 11:32:33,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:33,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:32:33,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:32:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:32:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:32:33,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-16 11:32:33,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 611 transitions, 7194 flow. Second operand has 35 states, 35 states have (on average 51.371428571428574) internal successors, (1798), 35 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:33,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:32:33,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-16 11:32:33,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:33:00,440 INFO L130 PetriNetUnfolder]: 1847/4819 cut-off events. [2022-11-16 11:33:00,440 INFO L131 PetriNetUnfolder]: For 33759/33759 co-relation queries the response was YES. [2022-11-16 11:33:00,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25093 conditions, 4819 events. 1847/4819 cut-off events. For 33759/33759 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 41410 event pairs, 79 based on Foata normal form. 9/4819 useless extension candidates. Maximal degree in co-relation 25020. Up to 1438 conditions per place. [2022-11-16 11:33:00,509 INFO L137 encePairwiseOnDemand]: 66/88 looper letters, 576 selfloop transitions, 469 changer transitions 76/1160 dead transitions. [2022-11-16 11:33:00,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1160 transitions, 15635 flow [2022-11-16 11:33:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-16 11:33:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-11-16 11:33:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4451 transitions. [2022-11-16 11:33:00,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6021374458874459 [2022-11-16 11:33:00,518 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4451 transitions. [2022-11-16 11:33:00,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4451 transitions. [2022-11-16 11:33:00,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:33:00,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4451 transitions. [2022-11-16 11:33:00,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 52.98809523809524) internal successors, (4451), 84 states have internal predecessors, (4451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:00,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 88.0) internal successors, (7480), 85 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:00,543 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 88.0) internal successors, (7480), 85 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:00,544 INFO L175 Difference]: Start difference. First operand has 292 places, 611 transitions, 7194 flow. Second operand 84 states and 4451 transitions. [2022-11-16 11:33:00,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1160 transitions, 15635 flow [2022-11-16 11:33:00,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1160 transitions, 15016 flow, removed 275 selfloop flow, removed 33 redundant places. [2022-11-16 11:33:00,856 INFO L231 Difference]: Finished difference. Result has 367 places, 858 transitions, 11681 flow [2022-11-16 11:33:00,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=6823, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=11681, PETRI_PLACES=367, PETRI_TRANSITIONS=858} [2022-11-16 11:33:00,857 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 289 predicate places. [2022-11-16 11:33:00,857 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 858 transitions, 11681 flow [2022-11-16 11:33:00,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 51.371428571428574) internal successors, (1798), 35 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:00,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:33:00,859 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:00,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:33:01,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:33:01,065 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:33:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1420383640, now seen corresponding path program 3 times [2022-11-16 11:33:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:33:01,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734002580] [2022-11-16 11:33:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:33:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:33:01,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:33:01,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734002580] [2022-11-16 11:33:01,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734002580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:33:01,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68454533] [2022-11-16 11:33:01,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:33:01,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:33:01,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:33:01,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:33:01,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:33:02,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:33:02,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:33:02,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:33:02,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:03,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:04,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68454533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:04,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:33:04,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 18] total 39 [2022-11-16 11:33:04,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029798667] [2022-11-16 11:33:04,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:04,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:33:04,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:33:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:33:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:33:04,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-16 11:33:04,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 858 transitions, 11681 flow. Second operand has 39 states, 39 states have (on average 51.282051282051285) internal successors, (2000), 39 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:04,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:33:04,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-16 11:33:04,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:33:16,162 INFO L130 PetriNetUnfolder]: 2682/6878 cut-off events. [2022-11-16 11:33:16,163 INFO L131 PetriNetUnfolder]: For 89514/89514 co-relation queries the response was YES. [2022-11-16 11:33:16,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43509 conditions, 6878 events. 2682/6878 cut-off events. For 89514/89514 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 62319 event pairs, 88 based on Foata normal form. 12/6883 useless extension candidates. Maximal degree in co-relation 43408. Up to 1127 conditions per place. [2022-11-16 11:33:16,266 INFO L137 encePairwiseOnDemand]: 66/88 looper letters, 525 selfloop transitions, 987 changer transitions 79/1630 dead transitions. [2022-11-16 11:33:16,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1630 transitions, 25782 flow [2022-11-16 11:33:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-16 11:33:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-11-16 11:33:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 4764 transitions. [2022-11-16 11:33:16,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.608273748723187 [2022-11-16 11:33:16,274 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 4764 transitions. [2022-11-16 11:33:16,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 4764 transitions. [2022-11-16 11:33:16,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:33:16,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 4764 transitions. [2022-11-16 11:33:16,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 53.52808988764045) internal successors, (4764), 89 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:16,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 88.0) internal successors, (7920), 90 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:16,299 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 88.0) internal successors, (7920), 90 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:16,300 INFO L175 Difference]: Start difference. First operand has 367 places, 858 transitions, 11681 flow. Second operand 89 states and 4764 transitions. [2022-11-16 11:33:16,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1630 transitions, 25782 flow [2022-11-16 11:33:17,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1630 transitions, 24857 flow, removed 387 selfloop flow, removed 39 redundant places. [2022-11-16 11:33:17,607 INFO L231 Difference]: Finished difference. Result has 443 places, 1254 transitions, 21390 flow [2022-11-16 11:33:17,608 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=11080, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=21390, PETRI_PLACES=443, PETRI_TRANSITIONS=1254} [2022-11-16 11:33:17,609 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 365 predicate places. [2022-11-16 11:33:17,609 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 1254 transitions, 21390 flow [2022-11-16 11:33:17,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 51.282051282051285) internal successors, (2000), 39 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:17,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:33:17,610 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:17,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 11:33:17,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:33:17,816 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:33:17,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:17,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1172714983, now seen corresponding path program 4 times [2022-11-16 11:33:17,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:33:17,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567798635] [2022-11-16 11:33:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:17,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:33:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:20,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:33:20,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567798635] [2022-11-16 11:33:20,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567798635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:33:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705149622] [2022-11-16 11:33:20,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:33:20,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:33:20,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:33:20,321 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:33:20,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:33:20,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:33:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:33:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:33:20,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:22,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:27,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705149622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:27,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:33:27,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 38 [2022-11-16 11:33:27,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527531090] [2022-11-16 11:33:27,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:27,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:33:27,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:33:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:33:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:33:27,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-11-16 11:33:27,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 1254 transitions, 21390 flow. Second operand has 38 states, 38 states have (on average 53.26315789473684) internal successors, (2024), 38 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:27,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:33:27,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-11-16 11:33:27,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:33:47,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:34:29,281 INFO L130 PetriNetUnfolder]: 2754/7649 cut-off events. [2022-11-16 11:34:29,282 INFO L131 PetriNetUnfolder]: For 143097/143213 co-relation queries the response was YES. [2022-11-16 11:34:29,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55269 conditions, 7649 events. 2754/7649 cut-off events. For 143097/143213 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 74397 event pairs, 42 based on Foata normal form. 65/7710 useless extension candidates. Maximal degree in co-relation 55140. Up to 2071 conditions per place. [2022-11-16 11:34:29,440 INFO L137 encePairwiseOnDemand]: 67/88 looper letters, 893 selfloop transitions, 745 changer transitions 95/1856 dead transitions. [2022-11-16 11:34:29,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1856 transitions, 35091 flow [2022-11-16 11:34:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-16 11:34:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-11-16 11:34:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 4979 transitions. [2022-11-16 11:34:29,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6217532467532467 [2022-11-16 11:34:29,449 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 4979 transitions. [2022-11-16 11:34:29,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 4979 transitions. [2022-11-16 11:34:29,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:34:29,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 4979 transitions. [2022-11-16 11:34:29,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 54.714285714285715) internal successors, (4979), 91 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:29,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 88.0) internal successors, (8096), 92 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:29,473 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 88.0) internal successors, (8096), 92 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:29,473 INFO L175 Difference]: Start difference. First operand has 443 places, 1254 transitions, 21390 flow. Second operand 91 states and 4979 transitions. [2022-11-16 11:34:29,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1856 transitions, 35091 flow [2022-11-16 11:34:31,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1856 transitions, 32227 flow, removed 1348 selfloop flow, removed 44 redundant places. [2022-11-16 11:34:31,381 INFO L231 Difference]: Finished difference. Result has 516 places, 1557 transitions, 28249 flow [2022-11-16 11:34:31,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=19714, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=28249, PETRI_PLACES=516, PETRI_TRANSITIONS=1557} [2022-11-16 11:34:31,382 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 438 predicate places. [2022-11-16 11:34:31,382 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 1557 transitions, 28249 flow [2022-11-16 11:34:31,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 53.26315789473684) internal successors, (2024), 38 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:31,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:34:31,383 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:31,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:34:31,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:31,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:34:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1889315571, now seen corresponding path program 5 times [2022-11-16 11:34:31,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:34:31,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491853830] [2022-11-16 11:34:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:31,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:34:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:34:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491853830] [2022-11-16 11:34:33,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491853830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:34:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367860477] [2022-11-16 11:34:33,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:34:33,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:33,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:34:33,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:34:33,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:34:33,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:34:33,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:34:34,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:34:34,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:36,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:39,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367860477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:39,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:34:39,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 22] total 50 [2022-11-16 11:34:39,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442816767] [2022-11-16 11:34:39,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:39,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 11:34:39,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:34:39,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 11:34:39,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:34:39,918 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-16 11:34:39,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1557 transitions, 28249 flow. Second operand has 50 states, 50 states have (on average 50.86) internal successors, (2543), 50 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:39,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:34:39,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-16 11:34:39,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:35:52,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:22,925 INFO L130 PetriNetUnfolder]: 4516/11853 cut-off events. [2022-11-16 11:36:22,925 INFO L131 PetriNetUnfolder]: For 203733/203733 co-relation queries the response was YES. [2022-11-16 11:36:23,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87425 conditions, 11853 events. 4516/11853 cut-off events. For 203733/203733 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 120092 event pairs, 28 based on Foata normal form. 24/11875 useless extension candidates. Maximal degree in co-relation 87272. Up to 2050 conditions per place. [2022-11-16 11:36:23,349 INFO L137 encePairwiseOnDemand]: 62/88 looper letters, 1333 selfloop transitions, 2249 changer transitions 197/3818 dead transitions. [2022-11-16 11:36:23,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 3818 transitions, 76881 flow [2022-11-16 11:36:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-16 11:36:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2022-11-16 11:36:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 12717 transitions. [2022-11-16 11:36:23,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5971543951915853 [2022-11-16 11:36:23,373 INFO L72 ComplementDD]: Start complementDD. Operand 242 states and 12717 transitions. [2022-11-16 11:36:23,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 242 states and 12717 transitions. [2022-11-16 11:36:23,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:23,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 242 states and 12717 transitions. [2022-11-16 11:36:23,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 243 states, 242 states have (on average 52.549586776859506) internal successors, (12717), 242 states have internal predecessors, (12717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:23,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 243 states, 243 states have (on average 88.0) internal successors, (21384), 243 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:23,450 INFO L81 ComplementDD]: Finished complementDD. Result has 243 states, 243 states have (on average 88.0) internal successors, (21384), 243 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:23,450 INFO L175 Difference]: Start difference. First operand has 516 places, 1557 transitions, 28249 flow. Second operand 242 states and 12717 transitions. [2022-11-16 11:36:23,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 3818 transitions, 76881 flow [2022-11-16 11:36:26,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 3818 transitions, 73103 flow, removed 1762 selfloop flow, removed 47 redundant places. [2022-11-16 11:36:26,918 INFO L231 Difference]: Finished difference. Result has 763 places, 3050 transitions, 61943 flow [2022-11-16 11:36:26,919 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=27154, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=925, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=242, PETRI_FLOW=61943, PETRI_PLACES=763, PETRI_TRANSITIONS=3050} [2022-11-16 11:36:26,920 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 685 predicate places. [2022-11-16 11:36:26,920 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 3050 transitions, 61943 flow [2022-11-16 11:36:26,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 50.86) internal successors, (2543), 50 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:26,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:26,921 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:26,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:27,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:27,122 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:27,123 INFO L85 PathProgramCache]: Analyzing trace with hash 929625051, now seen corresponding path program 6 times [2022-11-16 11:36:27,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:27,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279045409] [2022-11-16 11:36:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:27,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:28,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:28,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279045409] [2022-11-16 11:36:28,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279045409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:28,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019123136] [2022-11-16 11:36:28,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:36:28,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:28,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:28,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:28,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9950d224-2933-4017-a3b0-1f0924189322/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:36:28,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 11:36:28,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:28,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:36:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:44,351 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 3772 DAG size of output: 3115 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)