./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:22:14,934 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:22:14,999 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 17:22:15,003 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:22:15,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:22:15,026 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:22:15,027 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:22:15,027 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:22:15,028 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:22:15,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:22:15,029 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:22:15,030 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:22:15,030 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:22:15,031 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:22:15,031 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:22:15,032 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:22:15,032 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:22:15,032 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:22:15,033 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:22:15,033 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:22:15,034 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:22:15,034 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:22:15,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:22:15,036 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:22:15,036 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:22:15,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:22:15,037 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:22:15,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:22:15,038 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:22:15,038 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:22:15,038 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:22:15,039 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 17:22:15,039 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 17:22:15,040 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:22:15,040 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:22:15,040 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:22:15,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:22:15,041 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:22:15,041 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:22:15,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:22:15,042 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:22:15,042 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:22:15,042 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:22:15,042 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:22:15,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:22:15,043 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:22:15,043 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:22:15,043 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:22:15,043 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:22:15,043 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_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2023-12-02 17:22:15,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:22:15,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:22:15,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:22:15,292 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:22:15,293 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:22:15,294 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-12-02 17:22:18,047 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:22:18,199 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:22:18,200 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-12-02 17:22:18,207 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/data/5c8cc25b0/8fc0725794e144beb50abe72ed197fef/FLAG6d7fa3952 [2023-12-02 17:22:18,219 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/data/5c8cc25b0/8fc0725794e144beb50abe72ed197fef [2023-12-02 17:22:18,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:22:18,222 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:22:18,224 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:22:18,224 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:22:18,228 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:22:18,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a704c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18, skipping insertion in model container [2023-12-02 17:22:18,230 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,250 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:22:18,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:22:18,397 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:22:18,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:22:18,423 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:18,423 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:18,429 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:22:18,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18 WrapperNode [2023-12-02 17:22:18,429 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:22:18,430 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:22:18,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:22:18,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:22:18,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,443 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,463 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 62 [2023-12-02 17:22:18,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:22:18,464 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:22:18,464 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:22:18,464 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:22:18,471 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,480 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,484 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,485 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,487 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:22:18,490 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:22:18,491 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:22:18,491 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:22:18,492 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (1/1) ... [2023-12-02 17:22:18,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:22:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:18,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:22:18,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:22:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:22:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-02 17:22:18,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-02 17:22:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-02 17:22:18,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-02 17:22:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:22:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:22:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:22:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 17:22:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 17:22:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:22:18,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:22:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:22:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:22:18,556 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 17:22:18,641 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:22:18,643 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:22:18,828 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:22:19,000 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:22:19,000 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 17:22:19,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:22:19 BoogieIcfgContainer [2023-12-02 17:22:19,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:22:19,003 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:22:19,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:22:19,006 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:22:19,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:22:18" (1/3) ... [2023-12-02 17:22:19,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd11e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:22:19, skipping insertion in model container [2023-12-02 17:22:19,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:18" (2/3) ... [2023-12-02 17:22:19,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd11e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:22:19, skipping insertion in model container [2023-12-02 17:22:19,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:22:19" (3/3) ... [2023-12-02 17:22:19,008 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-12-02 17:22:19,014 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 17:22:19,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:22:19,022 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-12-02 17:22:19,022 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 17:22:19,063 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-02 17:22:19,087 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 34 transitions, 82 flow [2023-12-02 17:22:19,123 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 221 states, 195 states have (on average 2.682051282051282) internal successors, (523), 220 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:19,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:22:19,143 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;@3dc2a4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:22:19,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-12-02 17:22:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 221 states, 195 states have (on average 2.682051282051282) internal successors, (523), 220 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 17:22:19,150 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:19,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 17:22:19,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:19,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash 293780992, now seen corresponding path program 1 times [2023-12-02 17:22:19,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:19,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191411569] [2023-12-02 17:22:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:19,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:19,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:19,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191411569] [2023-12-02 17:22:19,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191411569] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:19,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:22:19,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 17:22:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844199690] [2023-12-02 17:22:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:19,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:22:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:22:19,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:22:19,442 INFO L87 Difference]: Start difference. First operand has 221 states, 195 states have (on average 2.682051282051282) internal successors, (523), 220 states have internal predecessors, (523), 0 states have call successors, (0), 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 2.5) 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) [2023-12-02 17:22:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:19,528 INFO L93 Difference]: Finished difference Result 234 states and 542 transitions. [2023-12-02 17:22:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:22:19,530 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 5 [2023-12-02 17:22:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:19,543 INFO L225 Difference]: With dead ends: 234 [2023-12-02 17:22:19,543 INFO L226 Difference]: Without dead ends: 234 [2023-12-02 17:22:19,545 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 [2023-12-02 17:22:19,548 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:19,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:22:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-12-02 17:22:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 225. [2023-12-02 17:22:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 204 states have (on average 2.6176470588235294) internal successors, (534), 224 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 534 transitions. [2023-12-02 17:22:19,606 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 534 transitions. Word has length 5 [2023-12-02 17:22:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:19,606 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 534 transitions. [2023-12-02 17:22:19,606 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) [2023-12-02 17:22:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 534 transitions. [2023-12-02 17:22:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 17:22:19,607 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:19,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:19,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:22:19,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:19,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1144297085, now seen corresponding path program 1 times [2023-12-02 17:22:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:19,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310892711] [2023-12-02 17:22:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:19,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:19,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310892711] [2023-12-02 17:22:19,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310892711] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:19,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:22:19,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:22:19,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877731578] [2023-12-02 17:22:19,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:19,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:22:19,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:19,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:22:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:22:19,700 INFO L87 Difference]: Start difference. First operand 225 states and 534 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:19,818 INFO L93 Difference]: Finished difference Result 273 states and 651 transitions. [2023-12-02 17:22:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:22:19,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 17:22:19,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:19,822 INFO L225 Difference]: With dead ends: 273 [2023-12-02 17:22:19,822 INFO L226 Difference]: Without dead ends: 273 [2023-12-02 17:22:19,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:22:19,824 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:19,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 23 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:22:19,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-02 17:22:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2023-12-02 17:22:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 252 states have (on average 2.5833333333333335) internal successors, (651), 272 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 651 transitions. [2023-12-02 17:22:19,847 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 651 transitions. Word has length 7 [2023-12-02 17:22:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:19,847 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 651 transitions. [2023-12-02 17:22:19,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:19,848 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 651 transitions. [2023-12-02 17:22:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:22:19,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:19,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:19,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:22:19,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:19,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:19,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1835945148, now seen corresponding path program 1 times [2023-12-02 17:22:19,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:19,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174306938] [2023-12-02 17:22:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:19,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:19,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:19,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174306938] [2023-12-02 17:22:19,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174306938] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:19,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:22:19,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:22:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478468596] [2023-12-02 17:22:19,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:19,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:22:19,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:22:19,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:22:19,914 INFO L87 Difference]: Start difference. First operand 273 states and 651 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:19,945 INFO L93 Difference]: Finished difference Result 245 states and 582 transitions. [2023-12-02 17:22:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:22:19,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 17:22:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:19,949 INFO L225 Difference]: With dead ends: 245 [2023-12-02 17:22:19,949 INFO L226 Difference]: Without dead ends: 245 [2023-12-02 17:22:19,949 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 [2023-12-02 17:22:19,951 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:19,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 10 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:22:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-12-02 17:22:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2023-12-02 17:22:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 229 states have (on average 2.541484716157205) internal successors, (582), 244 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 582 transitions. [2023-12-02 17:22:19,968 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 582 transitions. Word has length 10 [2023-12-02 17:22:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:19,969 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 582 transitions. [2023-12-02 17:22:19,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 582 transitions. [2023-12-02 17:22:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:22:19,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:19,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:19,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:22:19,971 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:19,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1835945147, now seen corresponding path program 1 times [2023-12-02 17:22:19,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:19,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710541590] [2023-12-02 17:22:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:19,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:20,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:20,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710541590] [2023-12-02 17:22:20,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710541590] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:20,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:22:20,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:22:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070182729] [2023-12-02 17:22:20,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:20,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:22:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:20,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:22:20,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:22:20,031 INFO L87 Difference]: Start difference. First operand 245 states and 582 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:20,085 INFO L93 Difference]: Finished difference Result 360 states and 863 transitions. [2023-12-02 17:22:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:22:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 17:22:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:20,089 INFO L225 Difference]: With dead ends: 360 [2023-12-02 17:22:20,089 INFO L226 Difference]: Without dead ends: 360 [2023-12-02 17:22:20,090 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 [2023-12-02 17:22:20,091 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:20,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:22:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-12-02 17:22:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 313. [2023-12-02 17:22:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 297 states have (on average 2.653198653198653) internal successors, (788), 312 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 788 transitions. [2023-12-02 17:22:20,108 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 788 transitions. Word has length 10 [2023-12-02 17:22:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:20,109 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 788 transitions. [2023-12-02 17:22:20,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 788 transitions. [2023-12-02 17:22:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:22:20,111 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:20,111 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:20,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:22:20,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:20,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash -598711422, now seen corresponding path program 1 times [2023-12-02 17:22:20,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:20,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110984461] [2023-12-02 17:22:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:20,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:20,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:20,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110984461] [2023-12-02 17:22:20,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110984461] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:20,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:22:20,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:22:20,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134262329] [2023-12-02 17:22:20,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:20,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:22:20,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:22:20,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:22:20,158 INFO L87 Difference]: Start difference. First operand 313 states and 788 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:20,187 INFO L93 Difference]: Finished difference Result 295 states and 742 transitions. [2023-12-02 17:22:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:22:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 17:22:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:20,191 INFO L225 Difference]: With dead ends: 295 [2023-12-02 17:22:20,191 INFO L226 Difference]: Without dead ends: 295 [2023-12-02 17:22:20,191 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 [2023-12-02 17:22:20,192 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:20,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:22:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-12-02 17:22:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-12-02 17:22:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 282 states have (on average 2.631205673758865) internal successors, (742), 294 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 742 transitions. [2023-12-02 17:22:20,206 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 742 transitions. Word has length 10 [2023-12-02 17:22:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:20,207 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 742 transitions. [2023-12-02 17:22:20,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 742 transitions. [2023-12-02 17:22:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:22:20,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:20,209 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:20,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:22:20,209 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:20,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:20,210 INFO L85 PathProgramCache]: Analyzing trace with hash -598711421, now seen corresponding path program 1 times [2023-12-02 17:22:20,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:20,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264624797] [2023-12-02 17:22:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:20,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:20,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:20,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264624797] [2023-12-02 17:22:20,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264624797] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:20,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038638730] [2023-12-02 17:22:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:20,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:20,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:20,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:20,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:22:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:20,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:22:20,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:20,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:20,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038638730] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1620109662] [2023-12-02 17:22:20,434 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:22:20,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:20,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-12-02 17:22:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428348084] [2023-12-02 17:22:20,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:20,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:22:20,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:22:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:22:20,438 INFO L87 Difference]: Start difference. First operand 295 states and 742 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-12-02 17:22:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:20,565 INFO L93 Difference]: Finished difference Result 863 states and 2092 transitions. [2023-12-02 17:22:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:22:20,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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 10 [2023-12-02 17:22:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:20,573 INFO L225 Difference]: With dead ends: 863 [2023-12-02 17:22:20,573 INFO L226 Difference]: Without dead ends: 863 [2023-12-02 17:22:20,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:22:20,575 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 84 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:20,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 56 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:22:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2023-12-02 17:22:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 633. [2023-12-02 17:22:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 620 states have (on average 2.8403225806451613) internal successors, (1761), 632 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1761 transitions. [2023-12-02 17:22:20,610 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1761 transitions. Word has length 10 [2023-12-02 17:22:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:20,611 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 1761 transitions. [2023-12-02 17:22:20,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-12-02 17:22:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1761 transitions. [2023-12-02 17:22:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:22:20,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:20,613 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:20,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:22:20,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:20,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:20,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash 888665023, now seen corresponding path program 1 times [2023-12-02 17:22:20,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:20,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518794299] [2023-12-02 17:22:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:20,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:20,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518794299] [2023-12-02 17:22:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518794299] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190825051] [2023-12-02 17:22:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:20,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:20,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:20,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:22:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:20,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:22:20,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:21,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:21,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190825051] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:21,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:22:21,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2023-12-02 17:22:21,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880803259] [2023-12-02 17:22:21,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:21,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:22:21,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:21,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:22:21,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:22:21,082 INFO L87 Difference]: Start difference. First operand 633 states and 1761 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2023-12-02 17:22:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:21,131 INFO L93 Difference]: Finished difference Result 569 states and 1578 transitions. [2023-12-02 17:22:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:22:21,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 [2023-12-02 17:22:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:21,136 INFO L225 Difference]: With dead ends: 569 [2023-12-02 17:22:21,136 INFO L226 Difference]: Without dead ends: 569 [2023-12-02 17:22:21,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:22:21,137 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:21,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:22:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-12-02 17:22:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 567. [2023-12-02 17:22:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 558 states have (on average 2.8225806451612905) internal successors, (1575), 566 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1575 transitions. [2023-12-02 17:22:21,153 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1575 transitions. Word has length 12 [2023-12-02 17:22:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:21,154 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 1575 transitions. [2023-12-02 17:22:21,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2023-12-02 17:22:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1575 transitions. [2023-12-02 17:22:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:22:21,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:21,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:21,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:22:21,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:21,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:21,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:21,358 INFO L85 PathProgramCache]: Analyzing trace with hash 888665024, now seen corresponding path program 1 times [2023-12-02 17:22:21,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:21,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033085330] [2023-12-02 17:22:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:21,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:21,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:21,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033085330] [2023-12-02 17:22:21,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033085330] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:21,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501360496] [2023-12-02 17:22:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:21,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:21,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:21,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:21,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:22:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:21,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:22:21,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:22:21,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:22:21,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501360496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:21,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899054760] [2023-12-02 17:22:21,571 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:22:21,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:21,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2023-12-02 17:22:21,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869295843] [2023-12-02 17:22:21,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:21,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:22:21,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:22:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:22:21,574 INFO L87 Difference]: Start difference. First operand 567 states and 1575 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:21,715 INFO L93 Difference]: Finished difference Result 814 states and 2209 transitions. [2023-12-02 17:22:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:22:21,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2023-12-02 17:22:21,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:21,723 INFO L225 Difference]: With dead ends: 814 [2023-12-02 17:22:21,723 INFO L226 Difference]: Without dead ends: 814 [2023-12-02 17:22:21,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:22:21,724 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:21,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 39 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:22:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2023-12-02 17:22:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 351. [2023-12-02 17:22:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 2.7341040462427744) internal successors, (946), 350 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 946 transitions. [2023-12-02 17:22:21,753 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 946 transitions. Word has length 12 [2023-12-02 17:22:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:21,754 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 946 transitions. [2023-12-02 17:22:21,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 946 transitions. [2023-12-02 17:22:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:22:21,755 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:21,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:21,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:22:21,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:21,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:21,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash 163952261, now seen corresponding path program 1 times [2023-12-02 17:22:21,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:21,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779205729] [2023-12-02 17:22:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:21,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:22,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:22,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779205729] [2023-12-02 17:22:22,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779205729] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:22,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177635941] [2023-12-02 17:22:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:22,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:22,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:22,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:22,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:22:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:22,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:22:22,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:22,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:22:22,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177635941] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:22,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:22:22,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-12-02 17:22:22,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803035] [2023-12-02 17:22:22,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:22,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:22:22,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:22:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:22:22,097 INFO L87 Difference]: Start difference. First operand 351 states and 946 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2023-12-02 17:22:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:22,210 INFO L93 Difference]: Finished difference Result 341 states and 890 transitions. [2023-12-02 17:22:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:22:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2023-12-02 17:22:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:22,213 INFO L225 Difference]: With dead ends: 341 [2023-12-02 17:22:22,213 INFO L226 Difference]: Without dead ends: 341 [2023-12-02 17:22:22,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:22:22,214 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:22,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 31 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:22:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-12-02 17:22:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2023-12-02 17:22:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 337 states have (on average 2.6409495548961424) internal successors, (890), 340 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 890 transitions. [2023-12-02 17:22:22,223 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 890 transitions. Word has length 12 [2023-12-02 17:22:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:22,223 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 890 transitions. [2023-12-02 17:22:22,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2023-12-02 17:22:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 890 transitions. [2023-12-02 17:22:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 17:22:22,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:22,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 17:22:22,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:22:22,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:22,425 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:22,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash 787553117, now seen corresponding path program 1 times [2023-12-02 17:22:22,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:22,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648977733] [2023-12-02 17:22:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:22,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:22,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648977733] [2023-12-02 17:22:22,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648977733] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661283522] [2023-12-02 17:22:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:22,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:22,478 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:22,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:22:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:22,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:22:22,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:22,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661283522] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:22,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627097525] [2023-12-02 17:22:22,629 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:22:22,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:22,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-02 17:22:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661742424] [2023-12-02 17:22:22,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:22,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:22:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:22:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:22:22,632 INFO L87 Difference]: Start difference. First operand 341 states and 890 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:22,823 INFO L93 Difference]: Finished difference Result 677 states and 1773 transitions. [2023-12-02 17:22:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:22:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 13 [2023-12-02 17:22:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:22,828 INFO L225 Difference]: With dead ends: 677 [2023-12-02 17:22:22,828 INFO L226 Difference]: Without dead ends: 677 [2023-12-02 17:22:22,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:22:22,829 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:22,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 45 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:22:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2023-12-02 17:22:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2023-12-02 17:22:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 673 states have (on average 2.6344725111441307) internal successors, (1773), 676 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1773 transitions. [2023-12-02 17:22:22,848 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1773 transitions. Word has length 13 [2023-12-02 17:22:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:22,848 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 1773 transitions. [2023-12-02 17:22:22,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1773 transitions. [2023-12-02 17:22:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 17:22:22,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:22,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:22,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:22:23,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:22:23,050 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:23,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:23,050 INFO L85 PathProgramCache]: Analyzing trace with hash -535087363, now seen corresponding path program 1 times [2023-12-02 17:22:23,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:23,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839714645] [2023-12-02 17:22:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:23,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:23,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839714645] [2023-12-02 17:22:23,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839714645] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:23,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:22:23,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:22:23,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440019059] [2023-12-02 17:22:23,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:23,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:22:23,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:23,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:22:23,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:22:23,112 INFO L87 Difference]: Start difference. First operand 677 states and 1773 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:23,155 INFO L93 Difference]: Finished difference Result 677 states and 1763 transitions. [2023-12-02 17:22:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:22:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2023-12-02 17:22:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:23,159 INFO L225 Difference]: With dead ends: 677 [2023-12-02 17:22:23,159 INFO L226 Difference]: Without dead ends: 677 [2023-12-02 17:22:23,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:22:23,160 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:23,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 9 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:22:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2023-12-02 17:22:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2023-12-02 17:22:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 673 states have (on average 2.6196136701337296) internal successors, (1763), 676 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1763 transitions. [2023-12-02 17:22:23,177 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1763 transitions. Word has length 14 [2023-12-02 17:22:23,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:23,178 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 1763 transitions. [2023-12-02 17:22:23,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1763 transitions. [2023-12-02 17:22:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 17:22:23,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:23,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:23,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 17:22:23,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:23,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1003368223, now seen corresponding path program 1 times [2023-12-02 17:22:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:23,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054907664] [2023-12-02 17:22:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:23,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:23,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:23,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054907664] [2023-12-02 17:22:23,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054907664] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:23,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:22:23,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:22:23,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899685950] [2023-12-02 17:22:23,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:23,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:22:23,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:22:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:22:23,243 INFO L87 Difference]: Start difference. First operand 677 states and 1763 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:23,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:23,285 INFO L93 Difference]: Finished difference Result 797 states and 2073 transitions. [2023-12-02 17:22:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:22:23,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2023-12-02 17:22:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:23,291 INFO L225 Difference]: With dead ends: 797 [2023-12-02 17:22:23,291 INFO L226 Difference]: Without dead ends: 797 [2023-12-02 17:22:23,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:22:23,291 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:23,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 14 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:22:23,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-12-02 17:22:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 737. [2023-12-02 17:22:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 733 states have (on average 2.616643929058663) internal successors, (1918), 736 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1918 transitions. [2023-12-02 17:22:23,309 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1918 transitions. Word has length 19 [2023-12-02 17:22:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:23,310 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1918 transitions. [2023-12-02 17:22:23,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1918 transitions. [2023-12-02 17:22:23,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 17:22:23,310 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:23,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:23,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 17:22:23,311 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:23,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -753664131, now seen corresponding path program 1 times [2023-12-02 17:22:23,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:23,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224353543] [2023-12-02 17:22:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:23,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224353543] [2023-12-02 17:22:23,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224353543] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442511769] [2023-12-02 17:22:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:23,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:23,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:23,402 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:23,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:22:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:23,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:22:23,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:22:23,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:22:23,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442511769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:23,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:22:23,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-12-02 17:22:23,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067135365] [2023-12-02 17:22:23,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:23,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:22:23,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:22:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:22:23,611 INFO L87 Difference]: Start difference. First operand 737 states and 1918 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:23,638 INFO L93 Difference]: Finished difference Result 736 states and 1917 transitions. [2023-12-02 17:22:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:22:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-02 17:22:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:23,643 INFO L225 Difference]: With dead ends: 736 [2023-12-02 17:22:23,643 INFO L226 Difference]: Without dead ends: 736 [2023-12-02 17:22:23,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:22:23,644 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:23,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:22:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2023-12-02 17:22:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2023-12-02 17:22:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 733 states have (on average 2.6152796725784446) internal successors, (1917), 735 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1917 transitions. [2023-12-02 17:22:23,662 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1917 transitions. Word has length 21 [2023-12-02 17:22:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:23,662 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1917 transitions. [2023-12-02 17:22:23,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1917 transitions. [2023-12-02 17:22:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 17:22:23,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:23,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:23,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 17:22:23,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 17:22:23,865 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:23,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:23,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1888751280, now seen corresponding path program 1 times [2023-12-02 17:22:23,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:23,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529932591] [2023-12-02 17:22:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:23,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:23,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529932591] [2023-12-02 17:22:23,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529932591] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798483503] [2023-12-02 17:22:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:23,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:23,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:23,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:23,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:22:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:24,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:22:24,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:22:24,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:22:24,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798483503] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:24,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:22:24,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-12-02 17:22:24,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683822256] [2023-12-02 17:22:24,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:24,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:22:24,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:22:24,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:22:24,193 INFO L87 Difference]: Start difference. First operand 736 states and 1917 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:24,218 INFO L93 Difference]: Finished difference Result 735 states and 1916 transitions. [2023-12-02 17:22:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:22:24,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-02 17:22:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:24,223 INFO L225 Difference]: With dead ends: 735 [2023-12-02 17:22:24,223 INFO L226 Difference]: Without dead ends: 710 [2023-12-02 17:22:24,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:22:24,224 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:24,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:22:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-12-02 17:22:24,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 710. [2023-12-02 17:22:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 708 states have (on average 2.4971751412429377) internal successors, (1768), 709 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1768 transitions. [2023-12-02 17:22:24,247 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1768 transitions. Word has length 22 [2023-12-02 17:22:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:24,248 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 1768 transitions. [2023-12-02 17:22:24,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1768 transitions. [2023-12-02 17:22:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 17:22:24,249 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:24,249 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-12-02 17:22:24,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 17:22:24,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 17:22:24,450 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:24,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash -626757503, now seen corresponding path program 2 times [2023-12-02 17:22:24,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:24,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838146623] [2023-12-02 17:22:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:24,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:24,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838146623] [2023-12-02 17:22:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838146623] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052452679] [2023-12-02 17:22:24,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:22:24,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:24,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:24,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:24,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:22:24,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:22:24,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:22:24,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:22:24,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:24,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:24,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052452679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:24,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315714627] [2023-12-02 17:22:24,714 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:22:24,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:24,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-02 17:22:24,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506694000] [2023-12-02 17:22:24,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:24,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:22:24,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:22:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:22:24,717 INFO L87 Difference]: Start difference. First operand 710 states and 1768 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:24,857 INFO L93 Difference]: Finished difference Result 1706 states and 4250 transitions. [2023-12-02 17:22:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:22:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2023-12-02 17:22:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:24,869 INFO L225 Difference]: With dead ends: 1706 [2023-12-02 17:22:24,869 INFO L226 Difference]: Without dead ends: 1706 [2023-12-02 17:22:24,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:22:24,870 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:24,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 64 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:22:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2023-12-02 17:22:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1052. [2023-12-02 17:22:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1050 states have (on average 2.5352380952380953) internal successors, (2662), 1051 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 2662 transitions. [2023-12-02 17:22:24,917 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 2662 transitions. Word has length 25 [2023-12-02 17:22:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:24,918 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 2662 transitions. [2023-12-02 17:22:24,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 2662 transitions. [2023-12-02 17:22:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:22:24,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:24,920 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1] [2023-12-02 17:22:24,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:22:25,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:25,125 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:25,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:25,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1509620321, now seen corresponding path program 2 times [2023-12-02 17:22:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:25,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767579676] [2023-12-02 17:22:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:25,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:25,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:25,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767579676] [2023-12-02 17:22:25,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767579676] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:25,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840803281] [2023-12-02 17:22:25,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:22:25,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:25,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:25,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:25,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:22:25,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 17:22:25,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:22:25,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:22:25,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 17:22:25,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 17:22:25,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840803281] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:25,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114937421] [2023-12-02 17:22:25,454 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:22:25,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:25,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-12-02 17:22:25,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149782121] [2023-12-02 17:22:25,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:25,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:22:25,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:25,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:22:25,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:22:25,456 INFO L87 Difference]: Start difference. First operand 1052 states and 2662 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:25,754 INFO L93 Difference]: Finished difference Result 1244 states and 3053 transitions. [2023-12-02 17:22:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 17:22:25,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 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 28 [2023-12-02 17:22:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:25,763 INFO L225 Difference]: With dead ends: 1244 [2023-12-02 17:22:25,763 INFO L226 Difference]: Without dead ends: 1244 [2023-12-02 17:22:25,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:22:25,765 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 186 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:25,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 24 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:22:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2023-12-02 17:22:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 668. [2023-12-02 17:22:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.4182908545727138) internal successors, (1613), 667 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1613 transitions. [2023-12-02 17:22:25,791 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1613 transitions. Word has length 28 [2023-12-02 17:22:25,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:25,791 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 1613 transitions. [2023-12-02 17:22:25,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1613 transitions. [2023-12-02 17:22:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 17:22:25,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:25,794 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1] [2023-12-02 17:22:25,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 17:22:25,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 17:22:25,997 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:25,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1788789825, now seen corresponding path program 3 times [2023-12-02 17:22:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760920699] [2023-12-02 17:22:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:25,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:26,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:26,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760920699] [2023-12-02 17:22:26,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760920699] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:26,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910727978] [2023-12-02 17:22:26,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:22:26,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:26,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:26,200 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:26,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:22:26,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:22:26,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:22:26,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:22:26,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:26,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:26,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910727978] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:26,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1636011644] [2023-12-02 17:22:26,623 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:22:26,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:26,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-12-02 17:22:26,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749021275] [2023-12-02 17:22:26,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:26,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:22:26,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:22:26,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:22:26,626 INFO L87 Difference]: Start difference. First operand 668 states and 1613 transitions. Second operand has 25 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:26,951 INFO L93 Difference]: Finished difference Result 2450 states and 6008 transitions. [2023-12-02 17:22:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 17:22:26,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 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 55 [2023-12-02 17:22:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:26,968 INFO L225 Difference]: With dead ends: 2450 [2023-12-02 17:22:26,968 INFO L226 Difference]: Without dead ends: 2450 [2023-12-02 17:22:26,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:22:26,969 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 483 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:26,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 102 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:22:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2023-12-02 17:22:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 1388. [2023-12-02 17:22:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.4174477289113194) internal successors, (3353), 1387 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3353 transitions. [2023-12-02 17:22:27,017 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3353 transitions. Word has length 55 [2023-12-02 17:22:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:27,017 INFO L495 AbstractCegarLoop]: Abstraction has 1388 states and 3353 transitions. [2023-12-02 17:22:27,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3353 transitions. [2023-12-02 17:22:27,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 17:22:27,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:27,021 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1] [2023-12-02 17:22:27,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 17:22:27,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 17:22:27,222 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:27,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash 953695169, now seen corresponding path program 4 times [2023-12-02 17:22:27,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:27,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802864116] [2023-12-02 17:22:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:27,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:27,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:27,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802864116] [2023-12-02 17:22:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802864116] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241334492] [2023-12-02 17:22:27,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:22:27,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:27,937 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:27,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:22:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:28,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:22:28,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:28,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:29,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241334492] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368256718] [2023-12-02 17:22:29,050 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:22:29,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:29,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2023-12-02 17:22:29,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617055789] [2023-12-02 17:22:29,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:29,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 17:22:29,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:29,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 17:22:29,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:22:29,055 INFO L87 Difference]: Start difference. First operand 1388 states and 3353 transitions. Second operand has 48 states, 47 states have (on average 4.8936170212765955) internal successors, (230), 47 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:29,976 INFO L93 Difference]: Finished difference Result 7118 states and 17558 transitions. [2023-12-02 17:22:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 17:22:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.8936170212765955) internal successors, (230), 47 states have internal predecessors, (230), 0 states have call successors, (0), 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 115 [2023-12-02 17:22:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:30,013 INFO L225 Difference]: With dead ends: 7118 [2023-12-02 17:22:30,013 INFO L226 Difference]: Without dead ends: 7118 [2023-12-02 17:22:30,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:22:30,015 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 948 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:30,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 190 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:22:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2023-12-02 17:22:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 2828. [2023-12-02 17:22:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.417049876193845) internal successors, (6833), 2827 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 6833 transitions. [2023-12-02 17:22:30,126 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 6833 transitions. Word has length 115 [2023-12-02 17:22:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:30,126 INFO L495 AbstractCegarLoop]: Abstraction has 2828 states and 6833 transitions. [2023-12-02 17:22:30,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.8936170212765955) internal successors, (230), 47 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 6833 transitions. [2023-12-02 17:22:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-12-02 17:22:30,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:30,136 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1] [2023-12-02 17:22:30,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 17:22:30,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 17:22:30,337 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:30,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1374579393, now seen corresponding path program 5 times [2023-12-02 17:22:30,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:30,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106471851] [2023-12-02 17:22:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:30,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:32,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:32,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106471851] [2023-12-02 17:22:32,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106471851] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:32,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023935932] [2023-12-02 17:22:32,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:22:32,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:32,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:32,454 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:32,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 17:22:32,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-12-02 17:22:32,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:22:32,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 17:22:32,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:32,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:35,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023935932] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:35,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499788335] [2023-12-02 17:22:35,412 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:22:35,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:35,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2023-12-02 17:22:35,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407973561] [2023-12-02 17:22:35,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:35,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-12-02 17:22:35,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:35,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-12-02 17:22:35,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2023-12-02 17:22:35,419 INFO L87 Difference]: Start difference. First operand 2828 states and 6833 transitions. Second operand has 96 states, 95 states have (on average 4.947368421052632) internal successors, (470), 95 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:39,133 INFO L93 Difference]: Finished difference Result 22958 states and 56918 transitions. [2023-12-02 17:22:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-02 17:22:39,134 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.947368421052632) internal successors, (470), 95 states have internal predecessors, (470), 0 states have call successors, (0), 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 235 [2023-12-02 17:22:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:39,193 INFO L225 Difference]: With dead ends: 22958 [2023-12-02 17:22:39,193 INFO L226 Difference]: Without dead ends: 22958 [2023-12-02 17:22:39,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2023-12-02 17:22:39,196 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2016 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2016 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:39,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2016 Valid, 382 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:22:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22958 states. [2023-12-02 17:22:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22958 to 5708. [2023-12-02 17:22:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5708 states, 5707 states have (on average 2.416856492027335) internal successors, (13793), 5707 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5708 states to 5708 states and 13793 transitions. [2023-12-02 17:22:39,430 INFO L78 Accepts]: Start accepts. Automaton has 5708 states and 13793 transitions. Word has length 235 [2023-12-02 17:22:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:39,431 INFO L495 AbstractCegarLoop]: Abstraction has 5708 states and 13793 transitions. [2023-12-02 17:22:39,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.947368421052632) internal successors, (470), 95 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:22:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5708 states and 13793 transitions. [2023-12-02 17:22:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-12-02 17:22:39,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:39,453 INFO L195 NwaCegarLoop]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1, 1] [2023-12-02 17:22:39,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 17:22:39,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:39,654 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:39,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash -886585151, now seen corresponding path program 6 times [2023-12-02 17:22:39,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:39,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067842589] [2023-12-02 17:22:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:39,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:45,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:45,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067842589] [2023-12-02 17:22:45,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067842589] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:45,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718837016] [2023-12-02 17:22:45,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:22:45,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:45,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:45,642 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:45,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:22:45,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:22:45,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:22:45,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-02 17:22:45,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:46,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:22:54,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718837016] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:54,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393148482] [2023-12-02 17:22:54,860 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:22:54,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:54,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 190 [2023-12-02 17:22:54,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327525321] [2023-12-02 17:22:54,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:54,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2023-12-02 17:22:54,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:54,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2023-12-02 17:22:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2023-12-02 17:22:54,879 INFO L87 Difference]: Start difference. First operand 5708 states and 13793 transitions. Second operand has 192 states, 191 states have (on average 4.973821989528796) internal successors, (950), 191 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:23:29,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:23:29,195 INFO L93 Difference]: Finished difference Result 80558 states and 200438 transitions. [2023-12-02 17:23:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-12-02 17:23:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 4.973821989528796) internal successors, (950), 191 states have internal predecessors, (950), 0 states have call successors, (0), 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 475 [2023-12-02 17:23:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:23:29,451 INFO L225 Difference]: With dead ends: 80558 [2023-12-02 17:23:29,451 INFO L226 Difference]: Without dead ends: 80558 [2023-12-02 17:23:29,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 853 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2023-12-02 17:23:29,455 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6708 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6708 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:23:29,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6708 Valid, 766 Invalid, 2665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1127 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 17:23:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80558 states. [2023-12-02 17:23:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80558 to 11468. [2023-12-02 17:23:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11468 states, 11467 states have (on average 2.4167611406645158) internal successors, (27713), 11467 states have internal predecessors, (27713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:23:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 27713 transitions. [2023-12-02 17:23:29,977 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 27713 transitions. Word has length 475 [2023-12-02 17:23:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:23:29,977 INFO L495 AbstractCegarLoop]: Abstraction has 11468 states and 27713 transitions. [2023-12-02 17:23:29,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 4.973821989528796) internal successors, (950), 191 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:23:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 27713 transitions. [2023-12-02 17:23:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2023-12-02 17:23:30,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:23:30,014 INFO L195 NwaCegarLoop]: trace histogram [191, 190, 190, 190, 190, 1, 1, 1, 1] [2023-12-02 17:23:30,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 17:23:30,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:23:30,215 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:23:30,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:23:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash -36797247, now seen corresponding path program 7 times [2023-12-02 17:23:30,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:23:30,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421016816] [2023-12-02 17:23:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:23:30,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:23:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:23:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:23:57,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:23:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421016816] [2023-12-02 17:23:57,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421016816] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:23:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239185308] [2023-12-02 17:23:57,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:23:57,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:23:57,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:23:57,019 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:23:57,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 17:23:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:23:57,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 2163 conjuncts, 193 conjunts are in the unsatisfiable core [2023-12-02 17:23:57,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:23:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:23:58,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:24:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:24:31,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239185308] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:24:31,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1513160800] [2023-12-02 17:24:31,806 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:24:31,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:24:31,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 382 [2023-12-02 17:24:31,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439731262] [2023-12-02 17:24:31,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:24:31,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2023-12-02 17:24:31,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:24:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2023-12-02 17:24:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2023-12-02 17:24:31,832 INFO L87 Difference]: Start difference. First operand 11468 states and 27713 transitions. Second operand has 384 states, 383 states have (on average 4.986945169712794) internal successors, (1910), 383 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:46,714 INFO L93 Difference]: Finished difference Result 299438 states and 746678 transitions. [2023-12-02 17:31:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-12-02 17:31:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 4.986945169712794) internal successors, (1910), 383 states have internal predecessors, (1910), 0 states have call successors, (0), 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 955 [2023-12-02 17:31:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:47,553 INFO L225 Difference]: With dead ends: 299438 [2023-12-02 17:31:47,553 INFO L226 Difference]: Without dead ends: 299438 [2023-12-02 17:31:47,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2099 GetRequests, 1717 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2023-12-02 17:31:47,559 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14406 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 3073 mSolverCounterSat, 2406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14406 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 5479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2406 IncrementalHoareTripleChecker+Valid, 3073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:47,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14406 Valid, 1534 Invalid, 5479 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2406 Valid, 3073 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-02 17:31:47,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299438 states. [2023-12-02 17:31:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299438 to 22988. [2023-12-02 17:31:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22988 states, 22987 states have (on average 2.4167137947535564) internal successors, (55553), 22987 states have internal predecessors, (55553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22988 states to 22988 states and 55553 transitions. [2023-12-02 17:31:49,658 INFO L78 Accepts]: Start accepts. Automaton has 22988 states and 55553 transitions. Word has length 955 [2023-12-02 17:31:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:49,659 INFO L495 AbstractCegarLoop]: Abstraction has 22988 states and 55553 transitions. [2023-12-02 17:31:49,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 4.986945169712794) internal successors, (1910), 383 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 22988 states and 55553 transitions. [2023-12-02 17:31:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1916 [2023-12-02 17:31:49,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:49,739 INFO L195 NwaCegarLoop]: trace histogram [383, 382, 382, 382, 382, 1, 1, 1, 1] [2023-12-02 17:31:49,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 17:31:49,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 17:31:49,940 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:31:49,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2081686335, now seen corresponding path program 8 times [2023-12-02 17:31:49,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:49,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765891056] [2023-12-02 17:31:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:49,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 364619 backedges. 0 proven. 364619 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:34:07,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:34:07,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765891056] [2023-12-02 17:34:07,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765891056] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:34:07,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081130558] [2023-12-02 17:34:07,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:34:07,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:34:07,637 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:34:07,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee03c9-16f3-4af1-a065-af73114efd70/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:34:14,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2023-12-02 17:34:14,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:34:14,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 4275 conjuncts, 385 conjunts are in the unsatisfiable core [2023-12-02 17:34:14,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:34:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 364619 backedges. 0 proven. 364619 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:34:16,008 INFO L327 TraceCheckSpWp]: Computing backward predicates...