./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cf1a7837 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_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX --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 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:42:10,855 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:42:10,958 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-12 00:42:10,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:42:10,965 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:42:10,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:42:10,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:42:10,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:42:10,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:42:10,995 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:42:10,995 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:42:10,996 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:42:10,997 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:42:10,997 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:42:10,998 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:42:10,999 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:42:10,999 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:42:11,000 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:42:11,000 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:42:11,001 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:42:11,002 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:42:11,003 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:42:11,004 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:42:11,004 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:42:11,005 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:42:11,005 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:42:11,006 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:42:11,007 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:42:11,007 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:42:11,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:42:11,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:42:11,009 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 00:42:11,009 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:42:11,010 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:42:11,010 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:42:11,011 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:42:11,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:42:11,012 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:42:11,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:42:11,013 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:42:11,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:42:11,014 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:42:11,014 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:42:11,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:42:11,015 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:42:11,016 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:42:11,016 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:42:11,016 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_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 [2023-11-12 00:42:11,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:42:11,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:42:11,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:42:11,314 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:42:11,315 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:42:11,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-11-12 00:42:14,578 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:42:14,807 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:42:14,808 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-11-12 00:42:14,815 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/data/dda7d4ec1/08d333194ea142cf8d3cd2e5ae9ff235/FLAG8caa23da7 [2023-11-12 00:42:14,829 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/data/dda7d4ec1/08d333194ea142cf8d3cd2e5ae9ff235 [2023-11-12 00:42:14,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:42:14,834 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:42:14,835 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:42:14,836 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:42:14,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:42:14,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:42:14" (1/1) ... [2023-11-12 00:42:14,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f078a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:14, skipping insertion in model container [2023-11-12 00:42:14,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:42:14" (1/1) ... [2023-11-12 00:42:14,879 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:42:15,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:42:15,131 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:42:15,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:42:15,166 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:15,166 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:15,174 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:42:15,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15 WrapperNode [2023-11-12 00:42:15,175 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:42:15,177 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:42:15,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:42:15,177 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:42:15,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,195 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,223 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 135 [2023-11-12 00:42:15,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:42:15,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:42:15,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:42:15,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:42:15,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,239 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,248 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,252 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,254 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,259 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:42:15,261 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:42:15,261 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:42:15,261 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:42:15,262 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (1/1) ... [2023-11-12 00:42:15,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:42:15,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:15,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:42:15,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:42:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:42:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 00:42:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 00:42:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 00:42:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 00:42:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 00:42:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 00:42:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 00:42:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 00:42:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:42:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:42:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:42:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 00:42:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 00:42:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:42:15,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:42:15,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:42:15,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:42:15,362 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 00:42:15,474 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:42:15,476 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:42:15,916 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:42:16,027 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:42:16,028 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:42:16,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:42:16 BoogieIcfgContainer [2023-11-12 00:42:16,031 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:42:16,033 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:42:16,033 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:42:16,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:42:16,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:42:14" (1/3) ... [2023-11-12 00:42:16,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd7ed6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:42:16, skipping insertion in model container [2023-11-12 00:42:16,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:15" (2/3) ... [2023-11-12 00:42:16,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd7ed6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:42:16, skipping insertion in model container [2023-11-12 00:42:16,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:42:16" (3/3) ... [2023-11-12 00:42:16,040 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-11-12 00:42:16,050 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 00:42:16,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:42:16,061 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-12 00:42:16,061 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:42:16,178 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 00:42:16,227 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:42:16,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 160 transitions, 348 flow [2023-11-12 00:42:16,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 160 transitions, 348 flow [2023-11-12 00:42:16,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 160 transitions, 348 flow [2023-11-12 00:42:16,353 INFO L124 PetriNetUnfolderBase]: 9/156 cut-off events. [2023-11-12 00:42:16,353 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 00:42:16,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 156 events. 9/156 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-11-12 00:42:16,368 INFO L119 LiptonReduction]: Number of co-enabled transitions 6264 [2023-11-12 00:42:22,159 INFO L134 LiptonReduction]: Checked pairs total: 7303 [2023-11-12 00:42:22,159 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-11-12 00:42:22,187 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 49 transitions, 126 flow [2023-11-12 00:42:22,605 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6392 states, 5768 states have (on average 4.805131761442441) internal successors, (27716), 6391 states have internal predecessors, (27716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:22,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:42:22,640 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;@1a03e218, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:42:22,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-11-12 00:42:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 6392 states, 5768 states have (on average 4.805131761442441) internal successors, (27716), 6391 states have internal predecessors, (27716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:42:22,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:22,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:42:22,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:22,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash 21091676, now seen corresponding path program 1 times [2023-11-12 00:42:22,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:22,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387652374] [2023-11-12 00:42:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:23,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:23,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387652374] [2023-11-12 00:42:23,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387652374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:23,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:23,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:23,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212754215] [2023-11-12 00:42:23,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:23,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:23,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:23,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:23,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:23,125 INFO L87 Difference]: Start difference. First operand has 6392 states, 5768 states have (on average 4.805131761442441) internal successors, (27716), 6391 states have internal predecessors, (27716), 0 states have call successors, (0), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:23,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:23,492 INFO L93 Difference]: Finished difference Result 6614 states and 29307 transitions. [2023-11-12 00:42:23,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-11-12 00:42:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:23,619 INFO L225 Difference]: With dead ends: 6614 [2023-11-12 00:42:23,621 INFO L226 Difference]: Without dead ends: 6614 [2023-11-12 00:42:23,622 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 [2023-11-12 00:42:23,627 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:23,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6614 states. [2023-11-12 00:42:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6614 to 5410. [2023-11-12 00:42:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5410 states, 5011 states have (on average 5.033526242267013) internal successors, (25223), 5409 states have internal predecessors, (25223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5410 states to 5410 states and 25223 transitions. [2023-11-12 00:42:24,168 INFO L78 Accepts]: Start accepts. Automaton has 5410 states and 25223 transitions. Word has length 4 [2023-11-12 00:42:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:24,169 INFO L495 AbstractCegarLoop]: Abstraction has 5410 states and 25223 transitions. [2023-11-12 00:42:24,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 5410 states and 25223 transitions. [2023-11-12 00:42:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:42:24,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:24,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:42:24,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:42:24,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:24,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash 21091575, now seen corresponding path program 1 times [2023-11-12 00:42:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360482855] [2023-11-12 00:42:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:24,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:24,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360482855] [2023-11-12 00:42:24,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360482855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:24,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:24,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:42:24,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25075562] [2023-11-12 00:42:24,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:24,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:24,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:24,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:24,245 INFO L87 Difference]: Start difference. First operand 5410 states and 25223 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:24,513 INFO L93 Difference]: Finished difference Result 5452 states and 22976 transitions. [2023-11-12 00:42:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:24,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-11-12 00:42:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:24,587 INFO L225 Difference]: With dead ends: 5452 [2023-11-12 00:42:24,587 INFO L226 Difference]: Without dead ends: 5444 [2023-11-12 00:42:24,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:24,589 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:24,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2023-11-12 00:42:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 5172. [2023-11-12 00:42:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5172 states, 4773 states have (on average 4.650953278860255) internal successors, (22199), 5171 states have internal predecessors, (22199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5172 states to 5172 states and 22199 transitions. [2023-11-12 00:42:24,937 INFO L78 Accepts]: Start accepts. Automaton has 5172 states and 22199 transitions. Word has length 4 [2023-11-12 00:42:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:24,937 INFO L495 AbstractCegarLoop]: Abstraction has 5172 states and 22199 transitions. [2023-11-12 00:42:24,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5172 states and 22199 transitions. [2023-11-12 00:42:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:42:24,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:24,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:42:24,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:42:24,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:24,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:24,946 INFO L85 PathProgramCache]: Analyzing trace with hash 653842627, now seen corresponding path program 1 times [2023-11-12 00:42:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:24,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175701118] [2023-11-12 00:42:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:24,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:25,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175701118] [2023-11-12 00:42:25,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175701118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:25,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:25,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:25,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064787996] [2023-11-12 00:42:25,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:25,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:25,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:25,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:25,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:25,097 INFO L87 Difference]: Start difference. First operand 5172 states and 22199 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:25,283 INFO L93 Difference]: Finished difference Result 4570 states and 19555 transitions. [2023-11-12 00:42:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:42:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:25,325 INFO L225 Difference]: With dead ends: 4570 [2023-11-12 00:42:25,326 INFO L226 Difference]: Without dead ends: 4570 [2023-11-12 00:42:25,327 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 [2023-11-12 00:42:25,330 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:25,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2023-11-12 00:42:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 4570. [2023-11-12 00:42:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4251 states have (on average 4.60009409550694) internal successors, (19555), 4569 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 19555 transitions. [2023-11-12 00:42:25,811 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 19555 transitions. Word has length 5 [2023-11-12 00:42:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:25,812 INFO L495 AbstractCegarLoop]: Abstraction has 4570 states and 19555 transitions. [2023-11-12 00:42:25,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 19555 transitions. [2023-11-12 00:42:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:42:25,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:25,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:42:25,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:42:25,814 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:25,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash 653842526, now seen corresponding path program 1 times [2023-11-12 00:42:25,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:25,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555057489] [2023-11-12 00:42:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:25,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:25,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:25,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555057489] [2023-11-12 00:42:25,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555057489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:25,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:25,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842886579] [2023-11-12 00:42:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:25,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:25,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:25,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:25,913 INFO L87 Difference]: Start difference. First operand 4570 states and 19555 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:26,037 INFO L93 Difference]: Finished difference Result 3968 states and 16911 transitions. [2023-11-12 00:42:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:42:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:26,073 INFO L225 Difference]: With dead ends: 3968 [2023-11-12 00:42:26,075 INFO L226 Difference]: Without dead ends: 3968 [2023-11-12 00:42:26,075 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 [2023-11-12 00:42:26,078 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:26,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:26,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2023-11-12 00:42:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 3968. [2023-11-12 00:42:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3729 states have (on average 4.534995977473853) internal successors, (16911), 3967 states have internal predecessors, (16911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16911 transitions. [2023-11-12 00:42:26,453 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16911 transitions. Word has length 5 [2023-11-12 00:42:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:26,453 INFO L495 AbstractCegarLoop]: Abstraction has 3968 states and 16911 transitions. [2023-11-12 00:42:26,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16911 transitions. [2023-11-12 00:42:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:42:26,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:26,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:42:26,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:42:26,455 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:26,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash 653842527, now seen corresponding path program 1 times [2023-11-12 00:42:26,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:26,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646580203] [2023-11-12 00:42:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:26,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:26,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:26,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646580203] [2023-11-12 00:42:26,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646580203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:26,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044269692] [2023-11-12 00:42:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:26,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:26,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:26,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:26,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:42:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:26,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:42:26,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:26,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:26,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044269692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:26,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735937131] [2023-11-12 00:42:26,704 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 00:42:26,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:26,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-12 00:42:26,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038681926] [2023-11-12 00:42:26,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:26,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:42:26,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:26,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:42:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:42:26,712 INFO L87 Difference]: Start difference. First operand 3968 states and 16911 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:27,154 INFO L93 Difference]: Finished difference Result 11532 states and 47913 transitions. [2023-11-12 00:42:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:42:27,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:42:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:27,246 INFO L225 Difference]: With dead ends: 11532 [2023-11-12 00:42:27,246 INFO L226 Difference]: Without dead ends: 11528 [2023-11-12 00:42:27,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:42:27,247 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 145 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:27,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:42:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11528 states. [2023-11-12 00:42:27,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11528 to 7016. [2023-11-12 00:42:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7016 states, 6777 states have (on average 5.097683340711229) internal successors, (34547), 7015 states have internal predecessors, (34547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 34547 transitions. [2023-11-12 00:42:27,846 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 34547 transitions. Word has length 5 [2023-11-12 00:42:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:27,846 INFO L495 AbstractCegarLoop]: Abstraction has 7016 states and 34547 transitions. [2023-11-12 00:42:27,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 34547 transitions. [2023-11-12 00:42:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:42:27,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:27,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:42:27,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:28,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:28,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:28,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash 653842626, now seen corresponding path program 1 times [2023-11-12 00:42:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:28,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964042477] [2023-11-12 00:42:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:28,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:28,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:28,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964042477] [2023-11-12 00:42:28,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964042477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:28,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741635884] [2023-11-12 00:42:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:28,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:28,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:28,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:28,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:42:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:28,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:42:28,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:28,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:28,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741635884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:28,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877050497] [2023-11-12 00:42:28,413 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 00:42:28,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:28,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:42:28,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116323326] [2023-11-12 00:42:28,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:28,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:42:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:28,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:42:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:42:28,416 INFO L87 Difference]: Start difference. First operand 7016 states and 34547 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2023-11-12 00:42:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:28,755 INFO L93 Difference]: Finished difference Result 10314 states and 51535 transitions. [2023-11-12 00:42:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:42:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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 5 [2023-11-12 00:42:28,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:28,844 INFO L225 Difference]: With dead ends: 10314 [2023-11-12 00:42:28,845 INFO L226 Difference]: Without dead ends: 10314 [2023-11-12 00:42:28,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:42:28,847 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:28,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:42:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10314 states. [2023-11-12 00:42:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10314 to 10314. [2023-11-12 00:42:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10314 states, 10075 states have (on average 5.115136476426799) internal successors, (51535), 10313 states have internal predecessors, (51535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 51535 transitions. [2023-11-12 00:42:29,395 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 51535 transitions. Word has length 5 [2023-11-12 00:42:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:29,395 INFO L495 AbstractCegarLoop]: Abstraction has 10314 states and 51535 transitions. [2023-11-12 00:42:29,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2023-11-12 00:42:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 51535 transitions. [2023-11-12 00:42:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:42:29,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:29,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:29,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:29,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:29,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:29,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:29,605 INFO L85 PathProgramCache]: Analyzing trace with hash -543716210, now seen corresponding path program 1 times [2023-11-12 00:42:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:29,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747762487] [2023-11-12 00:42:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:29,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:29,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747762487] [2023-11-12 00:42:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747762487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:29,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:29,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719615376] [2023-11-12 00:42:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:29,673 INFO L87 Difference]: Start difference. First operand 10314 states and 51535 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2023-11-12 00:42:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:30,075 INFO L93 Difference]: Finished difference Result 14646 states and 74775 transitions. [2023-11-12 00:42:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2023-11-12 00:42:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:30,196 INFO L225 Difference]: With dead ends: 14646 [2023-11-12 00:42:30,196 INFO L226 Difference]: Without dead ends: 14646 [2023-11-12 00:42:30,196 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 [2023-11-12 00:42:30,197 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:30,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:30,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14646 states. [2023-11-12 00:42:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14646 to 11758. [2023-11-12 00:42:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11758 states, 11519 states have (on average 5.479902769337616) internal successors, (63123), 11757 states have internal predecessors, (63123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11758 states to 11758 states and 63123 transitions. [2023-11-12 00:42:31,098 INFO L78 Accepts]: Start accepts. Automaton has 11758 states and 63123 transitions. Word has length 8 [2023-11-12 00:42:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:31,098 INFO L495 AbstractCegarLoop]: Abstraction has 11758 states and 63123 transitions. [2023-11-12 00:42:31,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2023-11-12 00:42:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 11758 states and 63123 transitions. [2023-11-12 00:42:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:42:31,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:31,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:31,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:42:31,101 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:31,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:31,102 INFO L85 PathProgramCache]: Analyzing trace with hash -543716300, now seen corresponding path program 1 times [2023-11-12 00:42:31,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:31,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676904218] [2023-11-12 00:42:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:31,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:31,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:31,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676904218] [2023-11-12 00:42:31,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676904218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:31,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:31,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:42:31,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860885251] [2023-11-12 00:42:31,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:31,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:31,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:31,162 INFO L87 Difference]: Start difference. First operand 11758 states and 63123 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-11-12 00:42:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:31,368 INFO L93 Difference]: Finished difference Result 11302 states and 55734 transitions. [2023-11-12 00:42:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2023-11-12 00:42:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:31,617 INFO L225 Difference]: With dead ends: 11302 [2023-11-12 00:42:31,617 INFO L226 Difference]: Without dead ends: 11264 [2023-11-12 00:42:31,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:31,633 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:31,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:31,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11264 states. [2023-11-12 00:42:32,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11264 to 11068. [2023-11-12 00:42:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11068 states, 10829 states have (on average 5.0692584726198175) internal successors, (54895), 11067 states have internal predecessors, (54895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11068 states to 11068 states and 54895 transitions. [2023-11-12 00:42:32,270 INFO L78 Accepts]: Start accepts. Automaton has 11068 states and 54895 transitions. Word has length 8 [2023-11-12 00:42:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:32,270 INFO L495 AbstractCegarLoop]: Abstraction has 11068 states and 54895 transitions. [2023-11-12 00:42:32,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-11-12 00:42:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 11068 states and 54895 transitions. [2023-11-12 00:42:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:42:32,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:32,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:32,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:42:32,274 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:32,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:32,275 INFO L85 PathProgramCache]: Analyzing trace with hash -544984323, now seen corresponding path program 1 times [2023-11-12 00:42:32,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:32,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954464764] [2023-11-12 00:42:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:32,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:32,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:32,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954464764] [2023-11-12 00:42:32,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954464764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:32,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:32,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:32,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935900054] [2023-11-12 00:42:32,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:32,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:32,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:32,348 INFO L87 Difference]: Start difference. First operand 11068 states and 54895 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2023-11-12 00:42:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:32,571 INFO L93 Difference]: Finished difference Result 12466 states and 61586 transitions. [2023-11-12 00:42:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2023-11-12 00:42:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:32,667 INFO L225 Difference]: With dead ends: 12466 [2023-11-12 00:42:32,668 INFO L226 Difference]: Without dead ends: 12438 [2023-11-12 00:42:32,668 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 [2023-11-12 00:42:32,669 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:32,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12438 states. [2023-11-12 00:42:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12438 to 11736. [2023-11-12 00:42:33,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11736 states, 11497 states have (on average 5.140210489692963) internal successors, (59097), 11735 states have internal predecessors, (59097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11736 states to 11736 states and 59097 transitions. [2023-11-12 00:42:33,457 INFO L78 Accepts]: Start accepts. Automaton has 11736 states and 59097 transitions. Word has length 8 [2023-11-12 00:42:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:33,457 INFO L495 AbstractCegarLoop]: Abstraction has 11736 states and 59097 transitions. [2023-11-12 00:42:33,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2023-11-12 00:42:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 11736 states and 59097 transitions. [2023-11-12 00:42:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:42:33,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:33,459 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2023-11-12 00:42:33,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:42:33,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:33,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:33,460 INFO L85 PathProgramCache]: Analyzing trace with hash 949679800, now seen corresponding path program 2 times [2023-11-12 00:42:33,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:33,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060973743] [2023-11-12 00:42:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:33,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:33,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:33,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060973743] [2023-11-12 00:42:33,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060973743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:33,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273908329] [2023-11-12 00:42:33,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:42:33,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:33,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:33,548 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:33,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:42:33,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:42:33,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:42:33,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:42:33,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:33,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:33,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273908329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:33,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539339105] [2023-11-12 00:42:33,759 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 00:42:33,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:33,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 00:42:33,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076119902] [2023-11-12 00:42:33,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:33,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:42:33,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:33,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:42:33,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:42:33,764 INFO L87 Difference]: Start difference. First operand 11736 states and 59097 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:35,038 INFO L93 Difference]: Finished difference Result 38088 states and 177281 transitions. [2023-11-12 00:42:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:42:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2023-11-12 00:42:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:35,526 INFO L225 Difference]: With dead ends: 38088 [2023-11-12 00:42:35,526 INFO L226 Difference]: Without dead ends: 38060 [2023-11-12 00:42:35,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:42:35,527 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:35,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 0 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:42:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38060 states. [2023-11-12 00:42:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38060 to 17084. [2023-11-12 00:42:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17084 states, 16845 states have (on average 5.430394775897892) internal successors, (91475), 17083 states have internal predecessors, (91475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17084 states to 17084 states and 91475 transitions. [2023-11-12 00:42:36,519 INFO L78 Accepts]: Start accepts. Automaton has 17084 states and 91475 transitions. Word has length 8 [2023-11-12 00:42:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:36,520 INFO L495 AbstractCegarLoop]: Abstraction has 17084 states and 91475 transitions. [2023-11-12 00:42:36,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 17084 states and 91475 transitions. [2023-11-12 00:42:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:42:36,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:36,521 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2023-11-12 00:42:36,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:36,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:36,723 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:36,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:36,723 INFO L85 PathProgramCache]: Analyzing trace with hash 949679899, now seen corresponding path program 2 times [2023-11-12 00:42:36,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:36,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163787863] [2023-11-12 00:42:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:36,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:36,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:36,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163787863] [2023-11-12 00:42:36,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163787863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737519326] [2023-11-12 00:42:36,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:42:36,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:36,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:36,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:36,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:42:36,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 00:42:36,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:42:36,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:42:36,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:42:36,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:42:36,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737519326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:36,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:42:36,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-12 00:42:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071743121] [2023-11-12 00:42:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:36,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:36,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:42:36,925 INFO L87 Difference]: Start difference. First operand 17084 states and 91475 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:37,375 INFO L93 Difference]: Finished difference Result 13438 states and 67357 transitions. [2023-11-12 00:42:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:37,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:42:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:37,451 INFO L225 Difference]: With dead ends: 13438 [2023-11-12 00:42:37,451 INFO L226 Difference]: Without dead ends: 13438 [2023-11-12 00:42:37,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:42:37,452 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:37,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13438 states. [2023-11-12 00:42:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13438 to 11370. [2023-11-12 00:42:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11243 states have (on average 5.072578493284711) internal successors, (57031), 11369 states have internal predecessors, (57031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 57031 transitions. [2023-11-12 00:42:37,992 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 57031 transitions. Word has length 8 [2023-11-12 00:42:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:37,992 INFO L495 AbstractCegarLoop]: Abstraction has 11370 states and 57031 transitions. [2023-11-12 00:42:37,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 57031 transitions. [2023-11-12 00:42:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:42:37,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:37,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:37,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 00:42:38,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 00:42:38,196 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:38,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:38,197 INFO L85 PathProgramCache]: Analyzing trace with hash 324667378, now seen corresponding path program 1 times [2023-11-12 00:42:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:38,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810677628] [2023-11-12 00:42:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:38,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:38,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:38,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810677628] [2023-11-12 00:42:38,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810677628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:38,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:38,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:38,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987745430] [2023-11-12 00:42:38,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:38,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:38,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:38,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:38,243 INFO L87 Difference]: Start difference. First operand 11370 states and 57031 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:38,469 INFO L93 Difference]: Finished difference Result 9656 states and 48281 transitions. [2023-11-12 00:42:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:38,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-12 00:42:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:38,541 INFO L225 Difference]: With dead ends: 9656 [2023-11-12 00:42:38,541 INFO L226 Difference]: Without dead ends: 9656 [2023-11-12 00:42:38,542 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 [2023-11-12 00:42:38,542 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:38,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9656 states. [2023-11-12 00:42:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9656 to 9656. [2023-11-12 00:42:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9656 states, 9561 states have (on average 5.049785587281665) internal successors, (48281), 9655 states have internal predecessors, (48281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9656 states to 9656 states and 48281 transitions. [2023-11-12 00:42:39,106 INFO L78 Accepts]: Start accepts. Automaton has 9656 states and 48281 transitions. Word has length 9 [2023-11-12 00:42:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:39,106 INFO L495 AbstractCegarLoop]: Abstraction has 9656 states and 48281 transitions. [2023-11-12 00:42:39,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 9656 states and 48281 transitions. [2023-11-12 00:42:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:42:39,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:39,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:39,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:42:39,107 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:39,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash 324667288, now seen corresponding path program 1 times [2023-11-12 00:42:39,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:39,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037729551] [2023-11-12 00:42:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:39,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:39,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:39,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037729551] [2023-11-12 00:42:39,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037729551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:39,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:39,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:39,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990374771] [2023-11-12 00:42:39,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:39,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:39,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:39,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:39,145 INFO L87 Difference]: Start difference. First operand 9656 states and 48281 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:39,268 INFO L93 Difference]: Finished difference Result 7942 states and 39531 transitions. [2023-11-12 00:42:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-12 00:42:39,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:39,308 INFO L225 Difference]: With dead ends: 7942 [2023-11-12 00:42:39,308 INFO L226 Difference]: Without dead ends: 7942 [2023-11-12 00:42:39,309 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 [2023-11-12 00:42:39,309 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:39,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:42:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7942 states. [2023-11-12 00:42:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7942 to 7942. [2023-11-12 00:42:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7879 states have (on average 5.017261073740323) internal successors, (39531), 7941 states have internal predecessors, (39531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 39531 transitions. [2023-11-12 00:42:39,521 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 39531 transitions. Word has length 9 [2023-11-12 00:42:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:39,521 INFO L495 AbstractCegarLoop]: Abstraction has 7942 states and 39531 transitions. [2023-11-12 00:42:39,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 39531 transitions. [2023-11-12 00:42:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:42:39,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:39,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:39,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:42:39,523 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:39,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:39,523 INFO L85 PathProgramCache]: Analyzing trace with hash 324667289, now seen corresponding path program 1 times [2023-11-12 00:42:39,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:39,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396881396] [2023-11-12 00:42:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:39,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:39,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:39,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396881396] [2023-11-12 00:42:39,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396881396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:39,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122129395] [2023-11-12 00:42:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:39,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:39,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:39,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:42:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:39,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:42:39,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:39,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:39,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122129395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:39,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933570785] [2023-11-12 00:42:39,758 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 00:42:39,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:39,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-12 00:42:39,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128259666] [2023-11-12 00:42:39,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:39,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:42:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:42:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:42:39,761 INFO L87 Difference]: Start difference. First operand 7942 states and 39531 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:40,289 INFO L93 Difference]: Finished difference Result 18672 states and 92527 transitions. [2023-11-12 00:42:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:42:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 9 [2023-11-12 00:42:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:40,387 INFO L225 Difference]: With dead ends: 18672 [2023-11-12 00:42:40,388 INFO L226 Difference]: Without dead ends: 18648 [2023-11-12 00:42:40,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:42:40,388 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 130 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:40,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 0 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:42:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2023-11-12 00:42:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 14252. [2023-11-12 00:42:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14252 states, 14189 states have (on average 5.353865670589894) internal successors, (75966), 14251 states have internal predecessors, (75966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14252 states to 14252 states and 75966 transitions. [2023-11-12 00:42:40,827 INFO L78 Accepts]: Start accepts. Automaton has 14252 states and 75966 transitions. Word has length 9 [2023-11-12 00:42:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:40,827 INFO L495 AbstractCegarLoop]: Abstraction has 14252 states and 75966 transitions. [2023-11-12 00:42:40,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 14252 states and 75966 transitions. [2023-11-12 00:42:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:42:40,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:40,829 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:40,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 00:42:41,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 00:42:41,030 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:41,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:41,030 INFO L85 PathProgramCache]: Analyzing trace with hash 256091638, now seen corresponding path program 1 times [2023-11-12 00:42:41,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:41,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658026927] [2023-11-12 00:42:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:41,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:41,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658026927] [2023-11-12 00:42:41,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658026927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:41,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189513633] [2023-11-12 00:42:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:41,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:41,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:41,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:42:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:41,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:42:41,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:41,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:42:41,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189513633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:41,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:42:41,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-12 00:42:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079755177] [2023-11-12 00:42:41,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:41,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:42:41,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:42:41,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:42:41,224 INFO L87 Difference]: Start difference. First operand 14252 states and 75966 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:41,641 INFO L93 Difference]: Finished difference Result 13270 states and 68648 transitions. [2023-11-12 00:42:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:42:41,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2023-11-12 00:42:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:41,700 INFO L225 Difference]: With dead ends: 13270 [2023-11-12 00:42:41,700 INFO L226 Difference]: Without dead ends: 13270 [2023-11-12 00:42:41,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:42:41,701 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:41,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:42:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13270 states. [2023-11-12 00:42:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13270 to 12624. [2023-11-12 00:42:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12624 states, 12577 states have (on average 5.26938061540908) internal successors, (66273), 12623 states have internal predecessors, (66273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12624 states to 12624 states and 66273 transitions. [2023-11-12 00:42:42,020 INFO L78 Accepts]: Start accepts. Automaton has 12624 states and 66273 transitions. Word has length 10 [2023-11-12 00:42:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:42,021 INFO L495 AbstractCegarLoop]: Abstraction has 12624 states and 66273 transitions. [2023-11-12 00:42:42,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 12624 states and 66273 transitions. [2023-11-12 00:42:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:42:42,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:42,022 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:42,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:42,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 00:42:42,222 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:42,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash 256091639, now seen corresponding path program 1 times [2023-11-12 00:42:42,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:42,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226458357] [2023-11-12 00:42:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:42,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226458357] [2023-11-12 00:42:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226458357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189881706] [2023-11-12 00:42:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:42,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:42,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:42,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:42,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:42:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:42,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:42:42,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:42,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:42,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189881706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:42,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530406100] [2023-11-12 00:42:42,431 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 00:42:42,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:42,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:42:42,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733227185] [2023-11-12 00:42:42,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:42,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:42:42,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:42,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:42:42,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:42:42,435 INFO L87 Difference]: Start difference. First operand 12624 states and 66273 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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) [2023-11-12 00:42:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:43,057 INFO L93 Difference]: Finished difference Result 23272 states and 123377 transitions. [2023-11-12 00:42:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:42:43,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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 10 [2023-11-12 00:42:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:43,210 INFO L225 Difference]: With dead ends: 23272 [2023-11-12 00:42:43,210 INFO L226 Difference]: Without dead ends: 23104 [2023-11-12 00:42:43,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:42:43,211 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:43,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:42:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23104 states. [2023-11-12 00:42:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23104 to 19332. [2023-11-12 00:42:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19332 states, 19285 states have (on average 5.554316826549131) internal successors, (107115), 19331 states have internal predecessors, (107115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19332 states to 19332 states and 107115 transitions. [2023-11-12 00:42:44,390 INFO L78 Accepts]: Start accepts. Automaton has 19332 states and 107115 transitions. Word has length 10 [2023-11-12 00:42:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:44,390 INFO L495 AbstractCegarLoop]: Abstraction has 19332 states and 107115 transitions. [2023-11-12 00:42:44,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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) [2023-11-12 00:42:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 19332 states and 107115 transitions. [2023-11-12 00:42:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:42:44,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:44,410 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:44,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:44,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 00:42:44,621 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:44,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:44,621 INFO L85 PathProgramCache]: Analyzing trace with hash -99793611, now seen corresponding path program 2 times [2023-11-12 00:42:44,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:44,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801862012] [2023-11-12 00:42:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:44,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:44,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801862012] [2023-11-12 00:42:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801862012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293106349] [2023-11-12 00:42:44,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:42:44,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:44,726 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:44,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:42:44,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:42:44,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:42:44,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:42:44,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:44,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:44,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293106349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:44,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830774139] [2023-11-12 00:42:44,968 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 00:42:44,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:44,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 00:42:44,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726906428] [2023-11-12 00:42:44,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:44,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:42:44,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:44,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:42:44,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:42:44,973 INFO L87 Difference]: Start difference. First operand 19332 states and 107115 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:46,104 INFO L93 Difference]: Finished difference Result 61016 states and 330669 transitions. [2023-11-12 00:42:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:42:46,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2023-11-12 00:42:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:47,160 INFO L225 Difference]: With dead ends: 61016 [2023-11-12 00:42:47,160 INFO L226 Difference]: Without dead ends: 60920 [2023-11-12 00:42:47,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:42:47,161 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 563 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:47,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 0 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:42:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60920 states. [2023-11-12 00:42:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60920 to 34176. [2023-11-12 00:42:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34176 states, 34129 states have (on average 5.787189779952533) internal successors, (197511), 34175 states have internal predecessors, (197511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34176 states to 34176 states and 197511 transitions. [2023-11-12 00:42:48,945 INFO L78 Accepts]: Start accepts. Automaton has 34176 states and 197511 transitions. Word has length 12 [2023-11-12 00:42:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:48,945 INFO L495 AbstractCegarLoop]: Abstraction has 34176 states and 197511 transitions. [2023-11-12 00:42:48,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 34176 states and 197511 transitions. [2023-11-12 00:42:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:42:48,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:48,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:48,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:49,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 00:42:49,154 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread4Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:49,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash -100132023, now seen corresponding path program 1 times [2023-11-12 00:42:49,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:49,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048997881] [2023-11-12 00:42:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:49,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:49,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:49,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048997881] [2023-11-12 00:42:49,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048997881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:49,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:49,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:49,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039210893] [2023-11-12 00:42:49,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:49,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:49,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:49,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:49,197 INFO L87 Difference]: Start difference. First operand 34176 states and 197511 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-11-12 00:42:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:50,626 INFO L93 Difference]: Finished difference Result 41712 states and 244678 transitions. [2023-11-12 00:42:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:50,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 [2023-11-12 00:42:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:51,235 INFO L225 Difference]: With dead ends: 41712 [2023-11-12 00:42:51,235 INFO L226 Difference]: Without dead ends: 41594 [2023-11-12 00:42:51,235 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 [2023-11-12 00:42:51,236 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:51,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41594 states. [2023-11-12 00:42:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41594 to 40262. [2023-11-12 00:42:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40262 states, 40215 states have (on average 5.9222926768618676) internal successors, (238165), 40261 states have internal predecessors, (238165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40262 states to 40262 states and 238165 transitions. [2023-11-12 00:42:53,507 INFO L78 Accepts]: Start accepts. Automaton has 40262 states and 238165 transitions. Word has length 12 [2023-11-12 00:42:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:53,507 INFO L495 AbstractCegarLoop]: Abstraction has 40262 states and 238165 transitions. [2023-11-12 00:42:53,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-11-12 00:42:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 40262 states and 238165 transitions. [2023-11-12 00:42:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:42:53,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:53,513 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:53,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 00:42:53,514 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread4Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:53,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1422764339, now seen corresponding path program 1 times [2023-11-12 00:42:53,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:53,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179880981] [2023-11-12 00:42:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:53,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:53,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179880981] [2023-11-12 00:42:53,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179880981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:53,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683666659] [2023-11-12 00:42:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:53,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:53,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:53,575 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:53,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:42:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:53,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:42:53,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:53,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:53,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683666659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:53,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053650046] [2023-11-12 00:42:53,733 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 00:42:53,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:53,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:42:53,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37978983] [2023-11-12 00:42:53,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:42:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:42:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:42:53,738 INFO L87 Difference]: Start difference. First operand 40262 states and 238165 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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) [2023-11-12 00:42:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:55,486 INFO L93 Difference]: Finished difference Result 64202 states and 402965 transitions. [2023-11-12 00:42:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:42:55,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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 14 [2023-11-12 00:42:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:56,072 INFO L225 Difference]: With dead ends: 64202 [2023-11-12 00:42:56,072 INFO L226 Difference]: Without dead ends: 64202 [2023-11-12 00:42:56,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:42:56,073 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 207 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:56,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 0 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:42:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64202 states. [2023-11-12 00:42:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64202 to 57836. [2023-11-12 00:42:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57836 states, 57789 states have (on average 6.467338074720103) internal successors, (373741), 57835 states have internal predecessors, (373741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57836 states to 57836 states and 373741 transitions. [2023-11-12 00:42:59,647 INFO L78 Accepts]: Start accepts. Automaton has 57836 states and 373741 transitions. Word has length 14 [2023-11-12 00:42:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:59,648 INFO L495 AbstractCegarLoop]: Abstraction has 57836 states and 373741 transitions. [2023-11-12 00:42:59,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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) [2023-11-12 00:42:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57836 states and 373741 transitions. [2023-11-12 00:42:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:42:59,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:59,653 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:59,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:59,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_922eb535-983a-45a3-9efb-601d469c0bc8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:59,859 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 00:42:59,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1422764350, now seen corresponding path program 1 times [2023-11-12 00:42:59,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:59,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127569835] [2023-11-12 00:42:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:59,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:59,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127569835] [2023-11-12 00:42:59,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127569835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:59,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:59,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:59,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841962448] [2023-11-12 00:42:59,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:59,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:59,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:59,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:59,916 INFO L87 Difference]: Start difference. First operand 57836 states and 373741 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)