./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:34:38,726 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:34:38,794 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 15:34:38,800 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:34:38,801 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:34:38,829 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:34:38,829 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:34:38,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:34:38,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:34:38,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:34:38,832 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:34:38,832 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:34:38,833 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:34:38,833 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:34:38,834 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:34:38,834 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:34:38,835 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:34:38,835 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:34:38,836 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:34:38,836 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:34:38,837 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:34:38,838 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:34:38,839 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:34:38,839 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:34:38,839 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:34:38,840 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:34:38,840 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:34:38,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:34:38,841 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:34:38,841 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:34:38,842 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:34:38,842 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 15:34:38,843 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:34:38,843 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:34:38,843 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:34:38,843 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:34:38,844 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:34:38,844 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:34:38,844 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:34:38,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:34:38,844 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:34:38,845 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:34:38,845 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:34:38,845 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:34:38,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:34:38,846 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:34:38,846 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:34:38,846 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:34:38,846 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:34:38,846 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2023-12-02 15:34:39,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:34:39,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:34:39,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:34:39,090 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:34:39,090 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:34:39,091 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-12-02 15:34:41,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:34:42,134 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:34:42,134 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-12-02 15:34:42,150 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/data/caef35336/92c2b135494742ed970172c0e20f3cdc/FLAG2cb45f36c [2023-12-02 15:34:42,162 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/data/caef35336/92c2b135494742ed970172c0e20f3cdc [2023-12-02 15:34:42,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:34:42,167 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:34:42,168 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:34:42,168 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:34:42,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:34:42,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d3fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42, skipping insertion in model container [2023-12-02 15:34:42,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,216 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:34:42,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:34:42,501 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:34:42,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:34:42,585 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:34:42,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42 WrapperNode [2023-12-02 15:34:42,586 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:34:42,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:34:42,588 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:34:42,588 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:34:42,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,609 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,631 INFO L138 Inliner]: procedures = 171, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-12-02 15:34:42,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:34:42,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:34:42,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:34:42,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:34:42,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,646 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,656 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,658 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,660 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:34:42,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:34:42,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:34:42,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:34:42,665 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (1/1) ... [2023-12-02 15:34:42,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:34:42,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:42,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:34:42,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:34:42,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:34:42,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:34:42,735 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-02 15:34:42,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:34:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:34:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-02 15:34:42,736 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-02 15:34:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:34:42,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:34:42,737 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-02 15:34:42,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:34:42,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:34:42,739 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 15:34:42,868 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:34:42,870 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:34:43,053 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:34:43,216 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:34:43,216 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-12-02 15:34:43,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:34:43 BoogieIcfgContainer [2023-12-02 15:34:43,217 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:34:43,220 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:34:43,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:34:43,223 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:34:43,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:34:42" (1/3) ... [2023-12-02 15:34:43,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551483a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:34:43, skipping insertion in model container [2023-12-02 15:34:43,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:42" (2/3) ... [2023-12-02 15:34:43,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551483a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:34:43, skipping insertion in model container [2023-12-02 15:34:43,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:34:43" (3/3) ... [2023-12-02 15:34:43,226 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-12-02 15:34:43,235 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 15:34:43,245 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:34:43,246 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-12-02 15:34:43,246 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 15:34:43,280 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 15:34:43,310 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 49 transitions, 102 flow [2023-12-02 15:34:43,357 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 372 states, 353 states have (on average 2.348441926345609) internal successors, (829), 371 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:34:43,382 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@24a26ff4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:34:43,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-12-02 15:34:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 372 states, 353 states have (on average 2.348441926345609) internal successors, (829), 371 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:34:43,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:43,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 15:34:43,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-12-02 15:34:43,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 325396486, now seen corresponding path program 1 times [2023-12-02 15:34:43,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:43,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385334304] [2023-12-02 15:34:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:43,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:43,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:43,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385334304] [2023-12-02 15:34:43,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385334304] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:43,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:43,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:34:43,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755088040] [2023-12-02 15:34:43,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:43,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:43,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:43,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:43,689 INFO L87 Difference]: Start difference. First operand has 372 states, 353 states have (on average 2.348441926345609) internal successors, (829), 371 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:43,818 INFO L93 Difference]: Finished difference Result 320 states and 598 transitions. [2023-12-02 15:34:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 15:34:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:43,831 INFO L225 Difference]: With dead ends: 320 [2023-12-02 15:34:43,831 INFO L226 Difference]: Without dead ends: 292 [2023-12-02 15:34:43,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:43,835 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 53 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:43,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 65 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:34:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-02 15:34:43,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2023-12-02 15:34:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 283 states have (on average 1.9151943462897527) internal successors, (542), 291 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 542 transitions. [2023-12-02 15:34:43,889 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 542 transitions. Word has length 5 [2023-12-02 15:34:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:43,890 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 542 transitions. [2023-12-02 15:34:43,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 542 transitions. [2023-12-02 15:34:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 15:34:43,891 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:43,891 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:43,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:34:43,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-12-02 15:34:43,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:43,892 INFO L85 PathProgramCache]: Analyzing trace with hash 145832310, now seen corresponding path program 1 times [2023-12-02 15:34:43,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:43,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825334522] [2023-12-02 15:34:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:43,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:34:43,921 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 15:34:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:34:43,959 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 15:34:43,959 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 15:34:43,961 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-12-02 15:34:43,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 11 remaining) [2023-12-02 15:34:43,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 11 remaining) [2023-12-02 15:34:43,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 11 remaining) [2023-12-02 15:34:43,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 11 remaining) [2023-12-02 15:34:43,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 11 remaining) [2023-12-02 15:34:43,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 11 remaining) [2023-12-02 15:34:43,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 11 remaining) [2023-12-02 15:34:43,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 11 remaining) [2023-12-02 15:34:43,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 11 remaining) [2023-12-02 15:34:43,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 11 remaining) [2023-12-02 15:34:43,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:34:43,969 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-02 15:34:43,971 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 15:34:43,971 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 15:34:43,995 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 15:34:43,999 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 72 places, 81 transitions, 172 flow [2023-12-02 15:34:44,356 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10423 states, 10310 states have (on average 3.447623666343356) internal successors, (35545), 10422 states have internal predecessors, (35545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:44,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:34:44,359 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@24a26ff4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:34:44,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-12-02 15:34:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 10423 states, 10310 states have (on average 3.447623666343356) internal successors, (35545), 10422 states have internal predecessors, (35545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:34:44,395 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:44,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 15:34:44,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-12-02 15:34:44,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash 402724982, now seen corresponding path program 1 times [2023-12-02 15:34:44,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:44,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882604931] [2023-12-02 15:34:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:44,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:44,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:44,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882604931] [2023-12-02 15:34:44,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882604931] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:44,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:44,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:34:44,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460675773] [2023-12-02 15:34:44,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:44,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:44,496 INFO L87 Difference]: Start difference. First operand has 10423 states, 10310 states have (on average 3.447623666343356) internal successors, (35545), 10422 states have internal predecessors, (35545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:44,828 INFO L93 Difference]: Finished difference Result 10371 states and 29348 transitions. [2023-12-02 15:34:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:44,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 15:34:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:44,929 INFO L225 Difference]: With dead ends: 10371 [2023-12-02 15:34:44,929 INFO L226 Difference]: Without dead ends: 10063 [2023-12-02 15:34:44,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:44,931 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 53 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:44,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 112 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:34:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10063 states. [2023-12-02 15:34:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10063 to 10063. [2023-12-02 15:34:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10063 states, 9960 states have (on average 2.8566265060240963) internal successors, (28452), 10062 states have internal predecessors, (28452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10063 states to 10063 states and 28452 transitions. [2023-12-02 15:34:45,328 INFO L78 Accepts]: Start accepts. Automaton has 10063 states and 28452 transitions. Word has length 5 [2023-12-02 15:34:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:45,328 INFO L495 AbstractCegarLoop]: Abstraction has 10063 states and 28452 transitions. [2023-12-02 15:34:45,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 10063 states and 28452 transitions. [2023-12-02 15:34:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:34:45,330 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:45,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:45,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 15:34:45,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-12-02 15:34:45,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:45,331 INFO L85 PathProgramCache]: Analyzing trace with hash -792867480, now seen corresponding path program 1 times [2023-12-02 15:34:45,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:45,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098159016] [2023-12-02 15:34:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:45,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:45,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:45,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098159016] [2023-12-02 15:34:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098159016] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:45,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:34:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382302884] [2023-12-02 15:34:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:45,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:45,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:45,483 INFO L87 Difference]: Start difference. First operand 10063 states and 28452 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:45,832 INFO L93 Difference]: Finished difference Result 10219 states and 28902 transitions. [2023-12-02 15:34:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:34:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 15:34:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:45,896 INFO L225 Difference]: With dead ends: 10219 [2023-12-02 15:34:45,896 INFO L226 Difference]: Without dead ends: 10219 [2023-12-02 15:34:45,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:34:45,898 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 109 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:45,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 190 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10219 states. [2023-12-02 15:34:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10219 to 10219. [2023-12-02 15:34:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10219 states, 10134 states have (on average 2.85198342214328) internal successors, (28902), 10218 states have internal predecessors, (28902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10219 states to 10219 states and 28902 transitions. [2023-12-02 15:34:46,269 INFO L78 Accepts]: Start accepts. Automaton has 10219 states and 28902 transitions. Word has length 10 [2023-12-02 15:34:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:46,270 INFO L495 AbstractCegarLoop]: Abstraction has 10219 states and 28902 transitions. [2023-12-02 15:34:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10219 states and 28902 transitions. [2023-12-02 15:34:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:34:46,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:46,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:46,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 15:34:46,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-12-02 15:34:46,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1805801762, now seen corresponding path program 1 times [2023-12-02 15:34:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:46,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616511595] [2023-12-02 15:34:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:46,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:46,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:46,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616511595] [2023-12-02 15:34:46,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616511595] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:46,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111402563] [2023-12-02 15:34:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:46,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:46,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:46,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:46,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:34:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:46,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:46,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:46,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:46,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111402563] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:46,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:46,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 15:34:46,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054256947] [2023-12-02 15:34:46,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:46,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:34:46,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:34:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:46,550 INFO L87 Difference]: Start difference. First operand 10219 states and 28902 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:46,817 INFO L93 Difference]: Finished difference Result 9531 states and 26892 transitions. [2023-12-02 15:34:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:46,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 15:34:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:46,883 INFO L225 Difference]: With dead ends: 9531 [2023-12-02 15:34:46,883 INFO L226 Difference]: Without dead ends: 9531 [2023-12-02 15:34:46,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:34:46,884 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 183 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:46,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 235 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9531 states. [2023-12-02 15:34:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9531 to 9531. [2023-12-02 15:34:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9531 states, 9467 states have (on average 2.840604204077321) internal successors, (26892), 9530 states have internal predecessors, (26892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9531 states to 9531 states and 26892 transitions. [2023-12-02 15:34:47,243 INFO L78 Accepts]: Start accepts. Automaton has 9531 states and 26892 transitions. Word has length 10 [2023-12-02 15:34:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:47,244 INFO L495 AbstractCegarLoop]: Abstraction has 9531 states and 26892 transitions. [2023-12-02 15:34:47,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9531 states and 26892 transitions. [2023-12-02 15:34:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:34:47,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:47,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 15:34:47,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:47,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:47,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-12-02 15:34:47,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -145279386, now seen corresponding path program 1 times [2023-12-02 15:34:47,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:47,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216649657] [2023-12-02 15:34:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:47,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:47,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:47,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216649657] [2023-12-02 15:34:47,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216649657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:47,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:47,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:34:47,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650997405] [2023-12-02 15:34:47,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:47,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:47,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:47,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:47,509 INFO L87 Difference]: Start difference. First operand 9531 states and 26892 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:47,741 INFO L93 Difference]: Finished difference Result 8843 states and 24882 transitions. [2023-12-02 15:34:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 15:34:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:47,811 INFO L225 Difference]: With dead ends: 8843 [2023-12-02 15:34:47,811 INFO L226 Difference]: Without dead ends: 8843 [2023-12-02 15:34:47,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:47,812 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 104 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:47,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 120 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:34:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2023-12-02 15:34:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8843. [2023-12-02 15:34:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8843 states, 8800 states have (on average 2.8275) internal successors, (24882), 8842 states have internal predecessors, (24882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8843 states to 8843 states and 24882 transitions. [2023-12-02 15:34:47,968 INFO L78 Accepts]: Start accepts. Automaton has 8843 states and 24882 transitions. Word has length 11 [2023-12-02 15:34:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:47,968 INFO L495 AbstractCegarLoop]: Abstraction has 8843 states and 24882 transitions. [2023-12-02 15:34:47,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states and 24882 transitions. [2023-12-02 15:34:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 15:34:47,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:47,970 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 15:34:47,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 15:34:47,971 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-12-02 15:34:47,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:47,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2120443374, now seen corresponding path program 1 times [2023-12-02 15:34:47,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:47,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786585748] [2023-12-02 15:34:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:47,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:34:47,987 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 15:34:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:34:48,004 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 15:34:48,005 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 15:34:48,005 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2023-12-02 15:34:48,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 15 remaining) [2023-12-02 15:34:48,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 15 remaining) [2023-12-02 15:34:48,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 15 remaining) [2023-12-02 15:34:48,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 15 remaining) [2023-12-02 15:34:48,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 15 remaining) [2023-12-02 15:34:48,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 15 remaining) [2023-12-02 15:34:48,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 15 remaining) [2023-12-02 15:34:48,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 15 remaining) [2023-12-02 15:34:48,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 15 remaining) [2023-12-02 15:34:48,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 15 remaining) [2023-12-02 15:34:48,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 15 remaining) [2023-12-02 15:34:48,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 15 remaining) [2023-12-02 15:34:48,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 15 remaining) [2023-12-02 15:34:48,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 15 remaining) [2023-12-02 15:34:48,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 15:34:48,008 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-02 15:34:48,008 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 15:34:48,009 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 15:34:48,039 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 15:34:48,043 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 100 places, 113 transitions, 244 flow [2023-12-02 15:34:55,871 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 273198 states, 272611 states have (on average 4.611589407617448) internal successors, (1257170), 273197 states have internal predecessors, (1257170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:55,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:34:55,884 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@24a26ff4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:34:55,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-12-02 15:34:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 273198 states, 272611 states have (on average 4.611589407617448) internal successors, (1257170), 273197 states have internal predecessors, (1257170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:34:56,227 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:56,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 15:34:56,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-12-02 15:34:56,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:56,228 INFO L85 PathProgramCache]: Analyzing trace with hash 510591238, now seen corresponding path program 1 times [2023-12-02 15:34:56,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:56,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739117792] [2023-12-02 15:34:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:56,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:56,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:56,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739117792] [2023-12-02 15:34:56,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739117792] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:56,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:56,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:34:56,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602667421] [2023-12-02 15:34:56,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:56,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:56,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:56,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:56,662 INFO L87 Difference]: Start difference. First operand has 273198 states, 272611 states have (on average 4.611589407617448) internal successors, (1257170), 273197 states have internal predecessors, (1257170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:00,085 INFO L93 Difference]: Finished difference Result 273146 states and 1033856 transitions. [2023-12-02 15:35:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:35:00,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 15:35:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:01,995 INFO L225 Difference]: With dead ends: 273146 [2023-12-02 15:35:01,995 INFO L226 Difference]: Without dead ends: 270626 [2023-12-02 15:35:01,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:35:01,996 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 53 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:01,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 154 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:35:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270626 states. [2023-12-02 15:35:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270626 to 270626. [2023-12-02 15:35:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270626 states, 270049 states have (on average 3.7923191717058757) internal successors, (1024112), 270625 states have internal predecessors, (1024112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270626 states to 270626 states and 1024112 transitions. [2023-12-02 15:35:11,777 INFO L78 Accepts]: Start accepts. Automaton has 270626 states and 1024112 transitions. Word has length 5 [2023-12-02 15:35:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:11,777 INFO L495 AbstractCegarLoop]: Abstraction has 270626 states and 1024112 transitions. [2023-12-02 15:35:11,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 270626 states and 1024112 transitions. [2023-12-02 15:35:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:35:11,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:11,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:11,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 15:35:11,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-12-02 15:35:11,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1787330782, now seen corresponding path program 1 times [2023-12-02 15:35:11,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:35:11,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850796755] [2023-12-02 15:35:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:11,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:35:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:11,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:35:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850796755] [2023-12-02 15:35:11,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850796755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:35:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060049960] [2023-12-02 15:35:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:11,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:11,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:11,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:11,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:35:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:11,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:35:11,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:11,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:11,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060049960] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:11,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:35:11,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 15:35:11,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873644950] [2023-12-02 15:35:11,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:11,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:35:11,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:35:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:35:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:35:11,971 INFO L87 Difference]: Start difference. First operand 270626 states and 1024112 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:14,594 INFO L93 Difference]: Finished difference Result 252374 states and 953860 transitions. [2023-12-02 15:35:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:35:14,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 15:35:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:16,498 INFO L225 Difference]: With dead ends: 252374 [2023-12-02 15:35:16,498 INFO L226 Difference]: Without dead ends: 252374 [2023-12-02 15:35:16,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:35:16,499 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 209 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:16,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 349 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:35:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252374 states. [2023-12-02 15:35:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252374 to 252374. [2023-12-02 15:35:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252374 states, 251947 states have (on average 3.785954982595546) internal successors, (953860), 252373 states have internal predecessors, (953860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252374 states to 252374 states and 953860 transitions. [2023-12-02 15:35:25,418 INFO L78 Accepts]: Start accepts. Automaton has 252374 states and 953860 transitions. Word has length 10 [2023-12-02 15:35:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:25,418 INFO L495 AbstractCegarLoop]: Abstraction has 252374 states and 953860 transitions. [2023-12-02 15:35:25,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 252374 states and 953860 transitions. [2023-12-02 15:35:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:35:25,419 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:25,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:25,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:35:25,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 15:35:25,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-12-02 15:35:25,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash -469904377, now seen corresponding path program 1 times [2023-12-02 15:35:25,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:35:25,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847261140] [2023-12-02 15:35:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:25,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:35:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:25,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:35:25,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847261140] [2023-12-02 15:35:25,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847261140] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:25,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:35:25,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:35:25,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416103657] [2023-12-02 15:35:25,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:25,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:35:25,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:35:25,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:35:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:35:25,716 INFO L87 Difference]: Start difference. First operand 252374 states and 953860 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:28,105 INFO L93 Difference]: Finished difference Result 265834 states and 1005158 transitions. [2023-12-02 15:35:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:35:28,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 15:35:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:29,915 INFO L225 Difference]: With dead ends: 265834 [2023-12-02 15:35:29,916 INFO L226 Difference]: Without dead ends: 265834 [2023-12-02 15:35:29,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:35:29,916 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 205 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:29,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 230 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:35:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265834 states. [2023-12-02 15:35:36,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265834 to 265834. [2023-12-02 15:35:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265834 states, 265441 states have (on average 3.7867473374497536) internal successors, (1005158), 265833 states have internal predecessors, (1005158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265834 states to 265834 states and 1005158 transitions. [2023-12-02 15:35:39,192 INFO L78 Accepts]: Start accepts. Automaton has 265834 states and 1005158 transitions. Word has length 10 [2023-12-02 15:35:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:39,193 INFO L495 AbstractCegarLoop]: Abstraction has 265834 states and 1005158 transitions. [2023-12-02 15:35:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 265834 states and 1005158 transitions. [2023-12-02 15:35:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:35:39,194 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:39,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 15:35:39,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 15:35:39,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-12-02 15:35:39,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash -427320105, now seen corresponding path program 1 times [2023-12-02 15:35:39,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:35:39,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649700651] [2023-12-02 15:35:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:39,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:35:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:39,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:35:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649700651] [2023-12-02 15:35:39,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649700651] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:39,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:35:39,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:35:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557330722] [2023-12-02 15:35:39,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:39,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:35:39,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:35:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:35:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:35:39,231 INFO L87 Difference]: Start difference. First operand 265834 states and 1005158 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:41,668 INFO L93 Difference]: Finished difference Result 246618 states and 931168 transitions. [2023-12-02 15:35:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:35:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 15:35:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:43,029 INFO L225 Difference]: With dead ends: 246618 [2023-12-02 15:35:43,029 INFO L226 Difference]: Without dead ends: 246618 [2023-12-02 15:35:43,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:35:43,030 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 155 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:43,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 176 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:35:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246618 states. [2023-12-02 15:35:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246618 to 246618. [2023-12-02 15:35:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246618 states, 246363 states have (on average 3.7796584714425463) internal successors, (931168), 246617 states have internal predecessors, (931168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246618 states to 246618 states and 931168 transitions. [2023-12-02 15:35:52,318 INFO L78 Accepts]: Start accepts. Automaton has 246618 states and 931168 transitions. Word has length 11 [2023-12-02 15:35:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:52,319 INFO L495 AbstractCegarLoop]: Abstraction has 246618 states and 931168 transitions. [2023-12-02 15:35:52,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 246618 states and 931168 transitions. [2023-12-02 15:35:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 15:35:52,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:52,323 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:52,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 15:35:52,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-12-02 15:35:52,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:52,324 INFO L85 PathProgramCache]: Analyzing trace with hash 712825393, now seen corresponding path program 1 times [2023-12-02 15:35:52,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:35:52,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608761217] [2023-12-02 15:35:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:52,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:35:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:52,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:35:52,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608761217] [2023-12-02 15:35:52,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608761217] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:35:52,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205592071] [2023-12-02 15:35:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:52,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:52,619 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:52,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:35:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:52,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 15:35:52,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:52,773 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 15:35:52,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 15:35:52,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:35:52,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:35:52,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 15:35:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:52,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:53,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205592071] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:53,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748052179] [2023-12-02 15:35:53,028 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 15:35:53,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:35:53,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-12-02 15:35:53,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337788933] [2023-12-02 15:35:53,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:35:53,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:35:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:35:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:35:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:35:53,031 INFO L87 Difference]: Start difference. First operand 246618 states and 931168 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:56,297 INFO L93 Difference]: Finished difference Result 333402 states and 1261610 transitions. [2023-12-02 15:35:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 15:35:56,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 15:35:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:57,993 INFO L225 Difference]: With dead ends: 333402 [2023-12-02 15:35:57,993 INFO L226 Difference]: Without dead ends: 333402 [2023-12-02 15:35:57,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:35:57,994 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 757 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:57,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 496 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:35:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333402 states. [2023-12-02 15:36:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333402 to 260538. [2023-12-02 15:36:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260538 states, 260283 states have (on average 3.7811612744589542) internal successors, (984172), 260537 states have internal predecessors, (984172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:36:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260538 states to 260538 states and 984172 transitions. [2023-12-02 15:36:07,368 INFO L78 Accepts]: Start accepts. Automaton has 260538 states and 984172 transitions. Word has length 15 [2023-12-02 15:36:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:07,368 INFO L495 AbstractCegarLoop]: Abstraction has 260538 states and 984172 transitions. [2023-12-02 15:36:07,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:36:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 260538 states and 984172 transitions. [2023-12-02 15:36:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 15:36:07,371 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:07,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:36:07,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 15:36:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72360cbe-d271-49de-a1b4-ac6a2ca0b4dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 15:36:07,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-12-02 15:36:07,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash -549164577, now seen corresponding path program 1 times [2023-12-02 15:36:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:07,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710864828] [2023-12-02 15:36:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:07,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:36:07,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:07,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710864828] [2023-12-02 15:36:07,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710864828] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:36:07,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:36:07,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:36:07,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567149476] [2023-12-02 15:36:07,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:36:07,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:36:07,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:07,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:36:07,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:36:07,722 INFO L87 Difference]: Start difference. First operand 260538 states and 984172 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:36:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:11,018 INFO L93 Difference]: Finished difference Result 358295 states and 1366659 transitions. [2023-12-02 15:36:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:36:11,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 15:36:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:13,406 INFO L225 Difference]: With dead ends: 358295 [2023-12-02 15:36:13,406 INFO L226 Difference]: Without dead ends: 358295 [2023-12-02 15:36:13,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:36:13,406 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 375 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:13,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 616 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:36:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358295 states. [2023-12-02 15:36:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358295 to 319179. [2023-12-02 15:36:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319179 states, 318925 states have (on average 3.788451830367641) internal successors, (1208232), 319178 states have internal predecessors, (1208232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:36:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319179 states to 319179 states and 1208232 transitions. [2023-12-02 15:36:25,988 INFO L78 Accepts]: Start accepts. Automaton has 319179 states and 1208232 transitions. Word has length 17 [2023-12-02 15:36:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:25,989 INFO L495 AbstractCegarLoop]: Abstraction has 319179 states and 1208232 transitions. [2023-12-02 15:36:25,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:36:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 319179 states and 1208232 transitions. [2023-12-02 15:36:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 15:36:25,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:25,999 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2023-12-02 15:36:26,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 15:36:26,000 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-12-02 15:36:26,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1800338731, now seen corresponding path program 1 times [2023-12-02 15:36:26,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:26,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694389277] [2023-12-02 15:36:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:26,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:36:26,059 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 15:36:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:36:26,110 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 15:36:26,110 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 15:36:26,110 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 19 remaining) [2023-12-02 15:36:26,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 19 remaining) [2023-12-02 15:36:26,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 19 remaining) [2023-12-02 15:36:26,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 19 remaining) [2023-12-02 15:36:26,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 19 remaining) [2023-12-02 15:36:26,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 19 remaining) [2023-12-02 15:36:26,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 19 remaining) [2023-12-02 15:36:26,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 19 remaining) [2023-12-02 15:36:26,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 19 remaining) [2023-12-02 15:36:26,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 19 remaining) [2023-12-02 15:36:26,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 19 remaining) [2023-12-02 15:36:26,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 19 remaining) [2023-12-02 15:36:26,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 19 remaining) [2023-12-02 15:36:26,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 19 remaining) [2023-12-02 15:36:26,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 19 remaining) [2023-12-02 15:36:26,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 19 remaining) [2023-12-02 15:36:26,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 19 remaining) [2023-12-02 15:36:26,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 19 remaining) [2023-12-02 15:36:26,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 19 remaining) [2023-12-02 15:36:26,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 15:36:26,113 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:36:26,113 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 15:36:26,114 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-02 15:36:26,163 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 15:36:26,166 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 128 places, 145 transitions, 318 flow