./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91 --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 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:03:40,685 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:03:40,807 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-25 00:03:40,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:03:40,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:03:40,855 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:03:40,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:03:40,857 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:03:40,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:03:40,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:03:40,864 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:03:40,865 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:03:40,866 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:03:40,867 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:03:40,868 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:03:40,869 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:03:40,869 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:03:40,870 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:03:40,870 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:03:40,871 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:03:40,871 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:03:40,872 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:03:40,874 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:03:40,874 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:03:40,875 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:03:40,875 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:03:40,876 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:03:40,876 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:03:40,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:03:40,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:03:40,879 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:03:40,879 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-25 00:03:40,879 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:03:40,880 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:03:40,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:03:40,880 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:03:40,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:03:40,881 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:03:40,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:03:40,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:40,882 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:03:40,883 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:03:40,883 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:03:40,883 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:03:40,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:03:40,884 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:03:40,884 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:03:40,885 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:03:40,885 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:03:40,885 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_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 [2023-11-25 00:03:41,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:03:41,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:03:41,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:03:41,264 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:03:41,265 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:03:41,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2023-11-25 00:03:44,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:03:44,672 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:03:44,672 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2023-11-25 00:03:44,683 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/data/eeb088796/79e7591ffab743809f729680faaf03ce/FLAG04650b60a [2023-11-25 00:03:44,705 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/data/eeb088796/79e7591ffab743809f729680faaf03ce [2023-11-25 00:03:44,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:03:44,709 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:03:44,710 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:44,711 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:03:44,721 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:03:44,722 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a6720a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44, skipping insertion in model container [2023-11-25 00:03:44,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,753 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:03:44,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:44,952 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:03:44,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:44,989 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:44,989 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:45,002 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:03:45,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45 WrapperNode [2023-11-25 00:03:45,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:45,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:45,004 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:03:45,004 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:03:45,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,020 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,050 INFO L138 Inliner]: procedures = 24, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 108 [2023-11-25 00:03:45,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:45,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:03:45,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:03:45,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:03:45,060 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,074 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,079 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,083 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:03:45,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:03:45,089 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:03:45,089 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:03:45,090 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (1/1) ... [2023-11-25 00:03:45,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:45,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:45,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:03:45,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:03:45,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:03:45,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-25 00:03:45,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-25 00:03:45,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-25 00:03:45,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-25 00:03:45,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-25 00:03:45,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-25 00:03:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:03:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:03:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:03:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-25 00:03:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-25 00:03:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:03:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:03:45,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:03:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:03:45,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:03:45,178 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-25 00:03:45,287 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:03:45,290 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:03:45,648 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:03:46,035 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:03:46,035 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-25 00:03:46,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:46 BoogieIcfgContainer [2023-11-25 00:03:46,039 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:03:46,042 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:03:46,042 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:03:46,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:03:46,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:03:44" (1/3) ... [2023-11-25 00:03:46,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5464e550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:46, skipping insertion in model container [2023-11-25 00:03:46,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:45" (2/3) ... [2023-11-25 00:03:46,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5464e550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:46, skipping insertion in model container [2023-11-25 00:03:46,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:46" (3/3) ... [2023-11-25 00:03:46,053 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2023-11-25 00:03:46,063 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-25 00:03:46,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:03:46,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-25 00:03:46,076 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-25 00:03:46,149 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-25 00:03:46,196 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 119 flow [2023-11-25 00:03:46,352 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1819 states, 1791 states have (on average 3.4271356783919598) internal successors, (6138), 1818 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:46,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:03:46,384 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;@776b91ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:03:46,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-25 00:03:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 1819 states, 1791 states have (on average 3.4271356783919598) internal successors, (6138), 1818 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-25 00:03:46,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:46,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-25 00:03:46,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:46,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:46,409 INFO L85 PathProgramCache]: Analyzing trace with hash 486658, now seen corresponding path program 1 times [2023-11-25 00:03:46,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:46,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162551808] [2023-11-25 00:03:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:46,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:46,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:46,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162551808] [2023-11-25 00:03:46,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162551808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:46,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:46,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:03:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906335583] [2023-11-25 00:03:46,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:46,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:46,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:46,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:03:46,879 INFO L87 Difference]: Start difference. First operand has 1819 states, 1791 states have (on average 3.4271356783919598) internal successors, (6138), 1818 states have internal predecessors, (6138), 0 states have call successors, (0), 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 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:47,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:47,096 INFO L93 Difference]: Finished difference Result 1822 states and 6142 transitions. [2023-11-25 00:03:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:03:47,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-11-25 00:03:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:47,143 INFO L225 Difference]: With dead ends: 1822 [2023-11-25 00:03:47,143 INFO L226 Difference]: Without dead ends: 1822 [2023-11-25 00:03:47,145 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 [2023-11-25 00:03:47,149 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:47,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2023-11-25 00:03:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1822. [2023-11-25 00:03:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1794 states have (on average 3.423634336677815) internal successors, (6142), 1821 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6142 transitions. [2023-11-25 00:03:47,405 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6142 transitions. Word has length 3 [2023-11-25 00:03:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:47,406 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 6142 transitions. [2023-11-25 00:03:47,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:47,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6142 transitions. [2023-11-25 00:03:47,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-25 00:03:47,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:47,408 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-25 00:03:47,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:03:47,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:47,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:47,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1613602677, now seen corresponding path program 1 times [2023-11-25 00:03:47,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:47,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579715448] [2023-11-25 00:03:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:47,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:47,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:47,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579715448] [2023-11-25 00:03:47,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579715448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:47,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120288883] [2023-11-25 00:03:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:47,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:47,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:47,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:47,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:03:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:47,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:03:47,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:47,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:47,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120288883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:47,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:47,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-25 00:03:47,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49844111] [2023-11-25 00:03:47,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:47,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:03:47,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:03:47,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:03:47,767 INFO L87 Difference]: Start difference. First operand 1822 states and 6142 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:47,927 INFO L93 Difference]: Finished difference Result 1821 states and 6141 transitions. [2023-11-25 00:03:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:47,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-25 00:03:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:47,950 INFO L225 Difference]: With dead ends: 1821 [2023-11-25 00:03:47,951 INFO L226 Difference]: Without dead ends: 1821 [2023-11-25 00:03:47,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:03:47,955 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:47,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 60 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2023-11-25 00:03:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1821. [2023-11-25 00:03:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1794 states have (on average 3.423076923076923) internal successors, (6141), 1820 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 6141 transitions. [2023-11-25 00:03:48,085 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 6141 transitions. Word has length 6 [2023-11-25 00:03:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:48,085 INFO L495 AbstractCegarLoop]: Abstraction has 1821 states and 6141 transitions. [2023-11-25 00:03:48,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 6141 transitions. [2023-11-25 00:03:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-25 00:03:48,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:48,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-25 00:03:48,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:48,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:48,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1517924086, now seen corresponding path program 1 times [2023-11-25 00:03:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:48,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321401060] [2023-11-25 00:03:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:48,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:48,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:48,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321401060] [2023-11-25 00:03:48,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321401060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:48,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871744607] [2023-11-25 00:03:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:48,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:48,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:48,494 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:48,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:03:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:48,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:03:48,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:48,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:48,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871744607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:48,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [508326081] [2023-11-25 00:03:48,703 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) 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) [2023-11-25 00:03:48,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:48,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-25 00:03:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042283511] [2023-11-25 00:03:48,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:03:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:03:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:03:48,712 INFO L87 Difference]: Start difference. First operand 1821 states and 6141 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:48,973 INFO L93 Difference]: Finished difference Result 1830 states and 6153 transitions. [2023-11-25 00:03:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:03:48,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 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 7 [2023-11-25 00:03:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:48,993 INFO L225 Difference]: With dead ends: 1830 [2023-11-25 00:03:48,994 INFO L226 Difference]: Without dead ends: 1830 [2023-11-25 00:03:48,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:03:48,997 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:48,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:03:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2023-11-25 00:03:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1830. [2023-11-25 00:03:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1803 states have (on average 3.4126455906821964) internal successors, (6153), 1829 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6153 transitions. [2023-11-25 00:03:49,113 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6153 transitions. Word has length 7 [2023-11-25 00:03:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:49,113 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 6153 transitions. [2023-11-25 00:03:49,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6153 transitions. [2023-11-25 00:03:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-25 00:03:49,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:49,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:49,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:49,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:49,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1910507382, now seen corresponding path program 1 times [2023-11-25 00:03:49,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:49,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134470047] [2023-11-25 00:03:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:49,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:49,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134470047] [2023-11-25 00:03:49,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134470047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:49,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:49,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:03:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548937882] [2023-11-25 00:03:49,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:49,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:49,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:03:49,393 INFO L87 Difference]: Start difference. First operand 1830 states and 6153 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:49,566 INFO L93 Difference]: Finished difference Result 2740 states and 9458 transitions. [2023-11-25 00:03:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:03:49,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-11-25 00:03:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:49,596 INFO L225 Difference]: With dead ends: 2740 [2023-11-25 00:03:49,597 INFO L226 Difference]: Without dead ends: 2740 [2023-11-25 00:03:49,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:03:49,598 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:49,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 71 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2023-11-25 00:03:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2740. [2023-11-25 00:03:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2713 states have (on average 3.4861776631035752) internal successors, (9458), 2739 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 9458 transitions. [2023-11-25 00:03:49,789 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 9458 transitions. Word has length 8 [2023-11-25 00:03:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:49,790 INFO L495 AbstractCegarLoop]: Abstraction has 2740 states and 9458 transitions. [2023-11-25 00:03:49,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 9458 transitions. [2023-11-25 00:03:49,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-25 00:03:49,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:49,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:49,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:03:49,796 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:49,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1398843988, now seen corresponding path program 1 times [2023-11-25 00:03:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:49,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341760378] [2023-11-25 00:03:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:49,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341760378] [2023-11-25 00:03:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341760378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:49,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:49,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:03:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970040093] [2023-11-25 00:03:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:49,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:49,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:03:49,898 INFO L87 Difference]: Start difference. First operand 2740 states and 9458 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2023-11-25 00:03:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:50,108 INFO L93 Difference]: Finished difference Result 4230 states and 14952 transitions. [2023-11-25 00:03:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:03:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2023-11-25 00:03:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:50,157 INFO L225 Difference]: With dead ends: 4230 [2023-11-25 00:03:50,157 INFO L226 Difference]: Without dead ends: 4230 [2023-11-25 00:03:50,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:03:50,158 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:50,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 71 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2023-11-25 00:03:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4230. [2023-11-25 00:03:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4230 states, 4203 states have (on average 3.5574589578872233) internal successors, (14952), 4229 states have internal predecessors, (14952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 14952 transitions. [2023-11-25 00:03:50,447 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 14952 transitions. Word has length 10 [2023-11-25 00:03:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:50,449 INFO L495 AbstractCegarLoop]: Abstraction has 4230 states and 14952 transitions. [2023-11-25 00:03:50,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2023-11-25 00:03:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 14952 transitions. [2023-11-25 00:03:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-25 00:03:50,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:50,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:50,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:03:50,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:50,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1399985562, now seen corresponding path program 1 times [2023-11-25 00:03:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:50,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580331007] [2023-11-25 00:03:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:50,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:50,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:50,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580331007] [2023-11-25 00:03:50,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580331007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:50,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:50,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:03:50,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136653640] [2023-11-25 00:03:50,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:50,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:03:50,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:50,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:03:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:03:50,587 INFO L87 Difference]: Start difference. First operand 4230 states and 14952 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:50,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:50,689 INFO L93 Difference]: Finished difference Result 4230 states and 14951 transitions. [2023-11-25 00:03:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:03:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2023-11-25 00:03:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:50,723 INFO L225 Difference]: With dead ends: 4230 [2023-11-25 00:03:50,723 INFO L226 Difference]: Without dead ends: 4230 [2023-11-25 00:03:50,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:03:50,725 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:50,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2023-11-25 00:03:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4230. [2023-11-25 00:03:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4230 states, 4203 states have (on average 3.557221032595765) internal successors, (14951), 4229 states have internal predecessors, (14951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 14951 transitions. [2023-11-25 00:03:50,976 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 14951 transitions. Word has length 12 [2023-11-25 00:03:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:50,977 INFO L495 AbstractCegarLoop]: Abstraction has 4230 states and 14951 transitions. [2023-11-25 00:03:50,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 14951 transitions. [2023-11-25 00:03:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-25 00:03:50,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:50,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:50,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:03:50,980 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:50,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash 742246739, now seen corresponding path program 1 times [2023-11-25 00:03:50,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:50,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93713766] [2023-11-25 00:03:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:50,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:03:51,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93713766] [2023-11-25 00:03:51,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93713766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:51,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:51,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:03:51,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230546101] [2023-11-25 00:03:51,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:51,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:03:51,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:51,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:03:51,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:03:51,115 INFO L87 Difference]: Start difference. First operand 4230 states and 14951 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:51,282 INFO L93 Difference]: Finished difference Result 3808 states and 13433 transitions. [2023-11-25 00:03:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:03:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2023-11-25 00:03:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:51,306 INFO L225 Difference]: With dead ends: 3808 [2023-11-25 00:03:51,306 INFO L226 Difference]: Without dead ends: 3808 [2023-11-25 00:03:51,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:51,307 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:51,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 62 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2023-11-25 00:03:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3808. [2023-11-25 00:03:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3790 states have (on average 3.5443271767810027) internal successors, (13433), 3807 states have internal predecessors, (13433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 13433 transitions. [2023-11-25 00:03:51,524 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 13433 transitions. Word has length 15 [2023-11-25 00:03:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:51,524 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 13433 transitions. [2023-11-25 00:03:51,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 13433 transitions. [2023-11-25 00:03:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-25 00:03:51,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:51,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:51,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:03:51,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:51,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:51,529 INFO L85 PathProgramCache]: Analyzing trace with hash 499502473, now seen corresponding path program 1 times [2023-11-25 00:03:51,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:51,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297358312] [2023-11-25 00:03:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:51,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:03:51,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:51,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297358312] [2023-11-25 00:03:51,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297358312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:51,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787604595] [2023-11-25 00:03:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:51,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:51,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:51,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:51,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:03:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:51,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-25 00:03:51,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:51,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787604595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039295576] [2023-11-25 00:03:52,101 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) [2023-11-25 00:03:52,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:52,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-11-25 00:03:52,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024201857] [2023-11-25 00:03:52,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:52,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-25 00:03:52,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:52,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-25 00:03:52,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-25 00:03:52,104 INFO L87 Difference]: Start difference. First operand 3808 states and 13433 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:53,044 INFO L93 Difference]: Finished difference Result 5821 states and 20361 transitions. [2023-11-25 00:03:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-25 00:03:53,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 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 16 [2023-11-25 00:03:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:53,077 INFO L225 Difference]: With dead ends: 5821 [2023-11-25 00:03:53,077 INFO L226 Difference]: Without dead ends: 5807 [2023-11-25 00:03:53,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:03:53,080 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 343 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:53,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 474 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:03:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2023-11-25 00:03:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 5319. [2023-11-25 00:03:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5319 states, 5307 states have (on average 3.5732052006783492) internal successors, (18963), 5318 states have internal predecessors, (18963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5319 states to 5319 states and 18963 transitions. [2023-11-25 00:03:53,344 INFO L78 Accepts]: Start accepts. Automaton has 5319 states and 18963 transitions. Word has length 16 [2023-11-25 00:03:53,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:53,345 INFO L495 AbstractCegarLoop]: Abstraction has 5319 states and 18963 transitions. [2023-11-25 00:03:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand 5319 states and 18963 transitions. [2023-11-25 00:03:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-25 00:03:53,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:53,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:53,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:53,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-25 00:03:53,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:53,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:53,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1534812955, now seen corresponding path program 1 times [2023-11-25 00:03:53,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:53,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142295571] [2023-11-25 00:03:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:53,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:53,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:53,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142295571] [2023-11-25 00:03:53,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142295571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:53,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930204775] [2023-11-25 00:03:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:53,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:53,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:53,740 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:53,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:03:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:53,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:03:53,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:03:53,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:53,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930204775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:53,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:53,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-25 00:03:53,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561689606] [2023-11-25 00:03:53,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:53,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:03:53,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:03:53,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:03:53,924 INFO L87 Difference]: Start difference. First operand 5319 states and 18963 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:54,204 INFO L93 Difference]: Finished difference Result 5319 states and 19533 transitions. [2023-11-25 00:03:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:54,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-25 00:03:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:54,234 INFO L225 Difference]: With dead ends: 5319 [2023-11-25 00:03:54,234 INFO L226 Difference]: Without dead ends: 5163 [2023-11-25 00:03:54,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:03:54,237 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 115 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:54,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 50 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2023-11-25 00:03:54,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 4593. [2023-11-25 00:03:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4593 states, 4587 states have (on average 3.5362982341399607) internal successors, (16221), 4592 states have internal predecessors, (16221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4593 states to 4593 states and 16221 transitions. [2023-11-25 00:03:54,520 INFO L78 Accepts]: Start accepts. Automaton has 4593 states and 16221 transitions. Word has length 16 [2023-11-25 00:03:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:54,521 INFO L495 AbstractCegarLoop]: Abstraction has 4593 states and 16221 transitions. [2023-11-25 00:03:54,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4593 states and 16221 transitions. [2023-11-25 00:03:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-25 00:03:54,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:54,525 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1] [2023-11-25 00:03:54,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:54,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:54,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:54,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1377253667, now seen corresponding path program 2 times [2023-11-25 00:03:54,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:54,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632018524] [2023-11-25 00:03:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:54,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:54,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:54,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632018524] [2023-11-25 00:03:54,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632018524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:54,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894950623] [2023-11-25 00:03:54,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:03:54,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:54,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:54,924 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:54,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:03:55,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-25 00:03:55,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:55,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-25 00:03:55,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-25 00:03:55,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-25 00:03:55,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894950623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1944968521] [2023-11-25 00:03:55,105 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) 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) [2023-11-25 00:03:55,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:55,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-25 00:03:55,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682569332] [2023-11-25 00:03:55,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:55,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-25 00:03:55,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-25 00:03:55,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:03:55,109 INFO L87 Difference]: Start difference. First operand 4593 states and 16221 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:55,409 INFO L93 Difference]: Finished difference Result 4595 states and 16224 transitions. [2023-11-25 00:03:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-25 00:03:55,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 16 [2023-11-25 00:03:55,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:55,438 INFO L225 Difference]: With dead ends: 4595 [2023-11-25 00:03:55,439 INFO L226 Difference]: Without dead ends: 4595 [2023-11-25 00:03:55,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2023-11-25 00:03:55,440 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:55,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2023-11-25 00:03:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 4584. [2023-11-25 00:03:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4584 states, 4579 states have (on average 3.5400742520200916) internal successors, (16210), 4583 states have internal predecessors, (16210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4584 states to 4584 states and 16210 transitions. [2023-11-25 00:03:55,700 INFO L78 Accepts]: Start accepts. Automaton has 4584 states and 16210 transitions. Word has length 16 [2023-11-25 00:03:55,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:55,700 INFO L495 AbstractCegarLoop]: Abstraction has 4584 states and 16210 transitions. [2023-11-25 00:03:55,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4584 states and 16210 transitions. [2023-11-25 00:03:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-25 00:03:55,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:55,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:55,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:55,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:55,915 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:55,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:55,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1602431224, now seen corresponding path program 1 times [2023-11-25 00:03:55,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:55,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230933440] [2023-11-25 00:03:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:55,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:03:56,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:56,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230933440] [2023-11-25 00:03:56,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230933440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:56,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364655689] [2023-11-25 00:03:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:56,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:56,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:56,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:56,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:03:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:56,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-25 00:03:56,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:03:56,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:03:56,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364655689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:56,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285694015] [2023-11-25 00:03:56,413 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) [2023-11-25 00:03:56,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:56,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-11-25 00:03:56,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993134787] [2023-11-25 00:03:56,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:56,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-25 00:03:56,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-25 00:03:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:03:56,419 INFO L87 Difference]: Start difference. First operand 4584 states and 16210 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:56,751 INFO L93 Difference]: Finished difference Result 3416 states and 11823 transitions. [2023-11-25 00:03:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:03:56,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 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 18 [2023-11-25 00:03:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:56,769 INFO L225 Difference]: With dead ends: 3416 [2023-11-25 00:03:56,769 INFO L226 Difference]: Without dead ends: 3115 [2023-11-25 00:03:56,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-11-25 00:03:56,770 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 150 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:56,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 122 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:03:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2023-11-25 00:03:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3113. [2023-11-25 00:03:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3108 states have (on average 3.527992277992278) internal successors, (10965), 3112 states have internal predecessors, (10965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 10965 transitions. [2023-11-25 00:03:56,880 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 10965 transitions. Word has length 18 [2023-11-25 00:03:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:56,880 INFO L495 AbstractCegarLoop]: Abstraction has 3113 states and 10965 transitions. [2023-11-25 00:03:56,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 10965 transitions. [2023-11-25 00:03:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-25 00:03:56,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:56,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:56,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:57,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-25 00:03:57,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:57,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash -118795578, now seen corresponding path program 1 times [2023-11-25 00:03:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032910795] [2023-11-25 00:03:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:03:57,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032910795] [2023-11-25 00:03:57,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032910795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552776755] [2023-11-25 00:03:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:57,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:57,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:57,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:57,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:03:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:57,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:03:57,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:03:57,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:03:57,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552776755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:57,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586091954] [2023-11-25 00:03:57,430 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) [2023-11-25 00:03:57,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:57,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-25 00:03:57,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737501375] [2023-11-25 00:03:57,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:57,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:03:57,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:57,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:03:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:03:57,433 INFO L87 Difference]: Start difference. First operand 3113 states and 10965 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:57,840 INFO L93 Difference]: Finished difference Result 6503 states and 23445 transitions. [2023-11-25 00:03:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:03:57,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 20 [2023-11-25 00:03:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:57,871 INFO L225 Difference]: With dead ends: 6503 [2023-11-25 00:03:57,871 INFO L226 Difference]: Without dead ends: 6503 [2023-11-25 00:03:57,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:03:57,872 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 243 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:57,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 194 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:03:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6503 states. [2023-11-25 00:03:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6503 to 6503. [2023-11-25 00:03:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6503 states, 6498 states have (on average 3.60803324099723) internal successors, (23445), 6502 states have internal predecessors, (23445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6503 states to 6503 states and 23445 transitions. [2023-11-25 00:03:58,079 INFO L78 Accepts]: Start accepts. Automaton has 6503 states and 23445 transitions. Word has length 20 [2023-11-25 00:03:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:58,079 INFO L495 AbstractCegarLoop]: Abstraction has 6503 states and 23445 transitions. [2023-11-25 00:03:58,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 6503 states and 23445 transitions. [2023-11-25 00:03:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:03:58,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:58,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:58,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-25 00:03:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-25 00:03:58,294 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:58,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 24318005, now seen corresponding path program 2 times [2023-11-25 00:03:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:58,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803644545] [2023-11-25 00:03:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:58,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:03:58,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:58,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803644545] [2023-11-25 00:03:58,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803644545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:58,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932179118] [2023-11-25 00:03:58,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:03:58,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:58,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:58,442 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:58,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:03:58,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-25 00:03:58,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:58,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:03:58,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:03:58,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:58,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932179118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:58,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:58,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-25 00:03:58,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063122627] [2023-11-25 00:03:58,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:58,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:03:58,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:58,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:03:58,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:03:58,605 INFO L87 Difference]: Start difference. First operand 6503 states and 23445 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:58,784 INFO L93 Difference]: Finished difference Result 6041 states and 21799 transitions. [2023-11-25 00:03:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:03:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 21 [2023-11-25 00:03:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:58,820 INFO L225 Difference]: With dead ends: 6041 [2023-11-25 00:03:58,821 INFO L226 Difference]: Without dead ends: 6041 [2023-11-25 00:03:58,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:03:58,822 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:58,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 45 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6041 states. [2023-11-25 00:03:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6041 to 6041. [2023-11-25 00:03:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6041 states, 6038 states have (on average 3.6103014243126865) internal successors, (21799), 6040 states have internal predecessors, (21799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6041 states to 6041 states and 21799 transitions. [2023-11-25 00:03:59,069 INFO L78 Accepts]: Start accepts. Automaton has 6041 states and 21799 transitions. Word has length 21 [2023-11-25 00:03:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:59,069 INFO L495 AbstractCegarLoop]: Abstraction has 6041 states and 21799 transitions. [2023-11-25 00:03:59,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6041 states and 21799 transitions. [2023-11-25 00:03:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-25 00:03:59,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:59,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:59,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:59,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-25 00:03:59,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:03:59,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:59,279 INFO L85 PathProgramCache]: Analyzing trace with hash 753858672, now seen corresponding path program 1 times [2023-11-25 00:03:59,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:59,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79577604] [2023-11-25 00:03:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:59,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:03:59,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:59,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79577604] [2023-11-25 00:03:59,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79577604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:59,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068967186] [2023-11-25 00:03:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:59,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:59,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:59,360 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:59,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-25 00:03:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:59,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:03:59,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:59,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:59,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068967186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:59,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679711496] [2023-11-25 00:03:59,897 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) [2023-11-25 00:03:59,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:59,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 24 [2023-11-25 00:03:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371488638] [2023-11-25 00:03:59,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:59,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-25 00:03:59,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-25 00:03:59,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:03:59,900 INFO L87 Difference]: Start difference. First operand 6041 states and 21799 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:01,297 INFO L93 Difference]: Finished difference Result 12511 states and 44618 transitions. [2023-11-25 00:04:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-25 00:04:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 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 22 [2023-11-25 00:04:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:01,371 INFO L225 Difference]: With dead ends: 12511 [2023-11-25 00:04:01,371 INFO L226 Difference]: Without dead ends: 12299 [2023-11-25 00:04:01,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2023-11-25 00:04:01,373 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 450 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:01,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 399 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:04:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2023-11-25 00:04:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11433. [2023-11-25 00:04:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11433 states, 11430 states have (on average 3.6221347331583553) internal successors, (41401), 11432 states have internal predecessors, (41401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11433 states to 11433 states and 41401 transitions. [2023-11-25 00:04:01,875 INFO L78 Accepts]: Start accepts. Automaton has 11433 states and 41401 transitions. Word has length 22 [2023-11-25 00:04:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:01,875 INFO L495 AbstractCegarLoop]: Abstraction has 11433 states and 41401 transitions. [2023-11-25 00:04:01,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 11433 states and 41401 transitions. [2023-11-25 00:04:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-25 00:04:01,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:01,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:01,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-25 00:04:02,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-25 00:04:02,099 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:04:02,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1689316900, now seen corresponding path program 2 times [2023-11-25 00:04:02,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:02,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686872715] [2023-11-25 00:04:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:02,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:02,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:02,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686872715] [2023-11-25 00:04:02,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686872715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:04:02,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874887822] [2023-11-25 00:04:02,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:04:02,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:02,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:02,548 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:02,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-25 00:04:02,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-25 00:04:02,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:04:02,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:04:02,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-25 00:04:02,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:04:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-25 00:04:02,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874887822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:04:02,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508957345] [2023-11-25 00:04:02,821 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) [2023-11-25 00:04:02,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:04:02,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 3, 3] total 17 [2023-11-25 00:04:02,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165539577] [2023-11-25 00:04:02,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:04:02,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-25 00:04:02,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-25 00:04:02,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-25 00:04:02,826 INFO L87 Difference]: Start difference. First operand 11433 states and 41401 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:04,072 INFO L93 Difference]: Finished difference Result 17009 states and 61521 transitions. [2023-11-25 00:04:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-25 00:04:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 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 30 [2023-11-25 00:04:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:04,155 INFO L225 Difference]: With dead ends: 17009 [2023-11-25 00:04:04,155 INFO L226 Difference]: Without dead ends: 16165 [2023-11-25 00:04:04,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2023-11-25 00:04:04,157 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 266 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:04,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 441 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:04:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16165 states. [2023-11-25 00:04:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16165 to 8819. [2023-11-25 00:04:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 3.5051031980040825) internal successors, (30908), 8818 states have internal predecessors, (30908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 30908 transitions. [2023-11-25 00:04:04,615 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 30908 transitions. Word has length 30 [2023-11-25 00:04:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:04,617 INFO L495 AbstractCegarLoop]: Abstraction has 8819 states and 30908 transitions. [2023-11-25 00:04:04,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 30908 transitions. [2023-11-25 00:04:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-25 00:04:04,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:04,637 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-25 00:04:04,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-25 00:04:04,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-25 00:04:04,843 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-25 00:04:04,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:04,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1113679150, now seen corresponding path program 2 times [2023-11-25 00:04:04,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:04,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428606450] [2023-11-25 00:04:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:04,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-25 00:04:05,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:05,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428606450] [2023-11-25 00:04:05,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428606450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:04:05,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840513153] [2023-11-25 00:04:05,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:04:05,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:05,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:05,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:05,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-25 00:04:05,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-25 00:04:05,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:04:05,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:04:05,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-25 00:04:05,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:04:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-25 00:04:05,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840513153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:04:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657503965] [2023-11-25 00:04:05,314 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) [2023-11-25 00:04:05,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:04:05,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 11 [2023-11-25 00:04:05,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563651371] [2023-11-25 00:04:05,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:04:05,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-25 00:04:05,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-25 00:04:05,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:04:05,318 INFO L87 Difference]: Start difference. First operand 8819 states and 30908 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:05,937 INFO L93 Difference]: Finished difference Result 11405 states and 39774 transitions. [2023-11-25 00:04:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-25 00:04:05,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 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 35 [2023-11-25 00:04:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:05,938 INFO L225 Difference]: With dead ends: 11405 [2023-11-25 00:04:05,939 INFO L226 Difference]: Without dead ends: 0 [2023-11-25 00:04:05,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-11-25 00:04:05,939 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 245 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:05,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 132 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:04:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-25 00:04:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-25 00:04:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-25 00:04:05,941 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2023-11-25 00:04:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:05,941 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-25 00:04:05,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-25 00:04:05,942 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-25 00:04:05,944 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 17 remaining) [2023-11-25 00:04:05,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 17 remaining) [2023-11-25 00:04:05,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 17 remaining) [2023-11-25 00:04:05,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 17 remaining) [2023-11-25 00:04:05,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 17 remaining) [2023-11-25 00:04:05,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 17 remaining) [2023-11-25 00:04:05,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 17 remaining) [2023-11-25 00:04:05,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 17 remaining) [2023-11-25 00:04:05,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 17 remaining) [2023-11-25 00:04:05,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 17 remaining) [2023-11-25 00:04:05,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 17 remaining) [2023-11-25 00:04:05,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 17 remaining) [2023-11-25 00:04:05,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 17 remaining) [2023-11-25 00:04:05,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 17 remaining) [2023-11-25 00:04:05,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 17 remaining) [2023-11-25 00:04:05,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 17 remaining) [2023-11-25 00:04:05,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 17 remaining) [2023-11-25 00:04:05,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-25 00:04:06,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-25 00:04:06,151 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:06,155 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-25 00:04:06,155 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-25 00:04:06,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 12:04:06 BasicIcfg [2023-11-25 00:04:06,159 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-25 00:04:06,159 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-25 00:04:06,159 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-25 00:04:06,160 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-25 00:04:06,160 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:46" (3/4) ... [2023-11-25 00:04:06,162 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-25 00:04:06,166 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-25 00:04:06,166 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-25 00:04:06,166 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-11-25 00:04:06,173 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 96 nodes and edges [2023-11-25 00:04:06,174 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2023-11-25 00:04:06,174 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2023-11-25 00:04:06,175 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-25 00:04:06,293 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/witness.graphml [2023-11-25 00:04:06,293 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/witness.yml [2023-11-25 00:04:06,294 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-25 00:04:06,294 INFO L158 Benchmark]: Toolchain (without parser) took 21585.51ms. Allocated memory was 138.4MB in the beginning and 1.1GB in the end (delta: 977.3MB). Free memory was 105.7MB in the beginning and 823.0MB in the end (delta: -717.2MB). Peak memory consumption was 261.7MB. Max. memory is 16.1GB. [2023-11-25 00:04:06,295 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory is still 63.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-25 00:04:06,296 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.35ms. Allocated memory is still 138.4MB. Free memory was 105.7MB in the beginning and 93.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-25 00:04:06,296 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.98ms. Allocated memory is still 138.4MB. Free memory was 93.8MB in the beginning and 91.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-25 00:04:06,297 INFO L158 Benchmark]: Boogie Preprocessor took 36.51ms. Allocated memory is still 138.4MB. Free memory was 91.7MB in the beginning and 90.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-25 00:04:06,297 INFO L158 Benchmark]: RCFGBuilder took 950.91ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 90.1MB in the beginning and 131.6MB in the end (delta: -41.5MB). Peak memory consumption was 45.0MB. Max. memory is 16.1GB. [2023-11-25 00:04:06,298 INFO L158 Benchmark]: TraceAbstraction took 20116.84ms. Allocated memory was 167.8MB in the beginning and 1.1GB in the end (delta: 947.9MB). Free memory was 130.5MB in the beginning and 828.2MB in the end (delta: -697.7MB). Peak memory consumption was 250.2MB. Max. memory is 16.1GB. [2023-11-25 00:04:06,298 INFO L158 Benchmark]: Witness Printer took 134.57ms. Allocated memory is still 1.1GB. Free memory was 828.2MB in the beginning and 823.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-25 00:04:06,307 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory is still 63.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.35ms. Allocated memory is still 138.4MB. Free memory was 105.7MB in the beginning and 93.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.98ms. Allocated memory is still 138.4MB. Free memory was 93.8MB in the beginning and 91.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.51ms. Allocated memory is still 138.4MB. Free memory was 91.7MB in the beginning and 90.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 950.91ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 90.1MB in the beginning and 131.6MB in the end (delta: -41.5MB). Peak memory consumption was 45.0MB. Max. memory is 16.1GB. * TraceAbstraction took 20116.84ms. Allocated memory was 167.8MB in the beginning and 1.1GB in the end (delta: 947.9MB). Free memory was 130.5MB in the beginning and 828.2MB in the end (delta: -697.7MB). Peak memory consumption was 250.2MB. Max. memory is 16.1GB. * Witness Printer took 134.57ms. Allocated memory is still 1.1GB. Free memory was 828.2MB in the beginning and 823.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 46]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 46]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 70]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 70]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 110]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 110]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 76 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 20.0s, OverallIterations: 16, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2095 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2095 mSDsluCounter, 2412 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2033 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6209 IncrementalHoareTripleChecker+Invalid, 6237 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 379 mSDtfsCounter, 6209 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 512 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11433occurred in iteration=14, InterpolantAutomatonStates: 143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 16 MinimizatonAttempts, 9283 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 462 NumberOfCodeBlocks, 402 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 591 ConstructedInterpolants, 0 QuantifiedInterpolants, 1927 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1482 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 35 InterpolantComputations, 8 PerfectInterpolantSequences, 272/460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-25 00:04:06,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c00e6d-b534-450a-8328-f7bcd6f02970/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE