./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/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_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/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_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/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 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:22:07,118 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:22:07,214 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 12:22:07,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:22:07,221 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:22:07,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:22:07,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:22:07,274 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:22:07,275 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:22:07,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:22:07,276 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:22:07,277 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:22:07,277 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:22:07,278 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:22:07,279 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:22:07,279 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:22:07,280 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:22:07,281 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:22:07,281 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:22:07,282 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:22:07,282 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:22:07,283 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:22:07,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:22:07,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:22:07,285 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:22:07,286 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:22:07,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:22:07,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:22:07,287 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:22:07,287 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:22:07,288 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:22:07,288 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 12:22:07,289 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:22:07,289 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:22:07,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:22:07,289 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:22:07,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:22:07,290 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:22:07,290 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:22:07,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:22:07,291 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:22:07,291 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:22:07,291 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:22:07,291 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:22:07,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:22:07,292 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:22:07,292 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:22:07,292 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:22:07,293 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:22:07,293 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_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 [2023-12-02 12:22:07,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:22:07,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:22:07,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:22:07,588 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:22:07,588 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:22:07,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-12-02 12:22:10,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:22:10,833 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:22:10,833 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-12-02 12:22:10,842 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/data/48e65d89e/6c53935c78fb435e979101b32e586d2a/FLAG32860a309 [2023-12-02 12:22:10,857 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/data/48e65d89e/6c53935c78fb435e979101b32e586d2a [2023-12-02 12:22:10,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:22:10,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:22:10,863 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:22:10,863 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:22:10,867 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:22:10,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:22:10" (1/1) ... [2023-12-02 12:22:10,870 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e14b77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:10, skipping insertion in model container [2023-12-02 12:22:10,870 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:22:10" (1/1) ... [2023-12-02 12:22:10,898 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:22:11,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:22:11,085 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:22:11,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:22:11,126 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:22:11,126 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:22:11,136 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:22:11,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11 WrapperNode [2023-12-02 12:22:11,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:22:11,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:22:11,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:22:11,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:22:11,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,158 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,187 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 135 [2023-12-02 12:22:11,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:22:11,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:22:11,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:22:11,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:22:11,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,205 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,205 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,213 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,218 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,220 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,226 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:22:11,227 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:22:11,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:22:11,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:22:11,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (1/1) ... [2023-12-02 12:22:11,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:22:11,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:11,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:22:11,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:22:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:22:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-02 12:22:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-02 12:22:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-02 12:22:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-02 12:22:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-12-02 12:22:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-12-02 12:22:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-12-02 12:22:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-12-02 12:22:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:22:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 12:22:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:22:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 12:22:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 12:22:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:22:11,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:22:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 12:22:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:22:11,303 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 12:22:11,428 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:22:11,431 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:22:11,776 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:22:11,957 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:22:11,957 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 12:22:11,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:22:11 BoogieIcfgContainer [2023-12-02 12:22:11,958 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:22:11,961 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:22:11,962 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:22:11,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:22:11,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:22:10" (1/3) ... [2023-12-02 12:22:11,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8815b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:22:11, skipping insertion in model container [2023-12-02 12:22:11,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:11" (2/3) ... [2023-12-02 12:22:11,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8815b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:22:11, skipping insertion in model container [2023-12-02 12:22:11,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:22:11" (3/3) ... [2023-12-02 12:22:11,969 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-12-02 12:22:11,978 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 12:22:11,990 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:22:11,990 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-12-02 12:22:11,991 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 12:22:12,065 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-12-02 12:22:12,098 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 74 places, 65 transitions, 158 flow [2023-12-02 12:22:13,601 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35128 states, 34504 states have (on average 4.480060282865755) internal successors, (154580), 35127 states have internal predecessors, (154580), 0 states have call successors, (0), 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 12:22:13,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:22:13,627 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;@603a6480, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:22:13,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-12-02 12:22:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 35128 states, 34504 states have (on average 4.480060282865755) internal successors, (154580), 35127 states have internal predecessors, (154580), 0 states have call successors, (0), 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 12:22:13,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 12:22:13,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:13,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 12:22:13,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:13,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 413815877, now seen corresponding path program 1 times [2023-12-02 12:22:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:13,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016517048] [2023-12-02 12:22:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:14,100 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 12:22:14,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:14,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016517048] [2023-12-02 12:22:14,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016517048] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:14,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:14,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:22:14,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038121969] [2023-12-02 12:22:14,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:14,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:14,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:14,217 INFO L87 Difference]: Start difference. First operand has 35128 states, 34504 states have (on average 4.480060282865755) internal successors, (154580), 35127 states have internal predecessors, (154580), 0 states have call successors, (0), 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 12:22:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:15,141 INFO L93 Difference]: Finished difference Result 31878 states and 138272 transitions. [2023-12-02 12:22:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:15,144 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 12:22:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:15,691 INFO L225 Difference]: With dead ends: 31878 [2023-12-02 12:22:15,691 INFO L226 Difference]: Without dead ends: 31866 [2023-12-02 12:22:15,693 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 12:22:15,697 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:15,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 40 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31866 states. [2023-12-02 12:22:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31866 to 31170. [2023-12-02 12:22:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31170 states, 30752 states have (on average 4.431906867845994) internal successors, (136290), 31169 states have internal predecessors, (136290), 0 states have call successors, (0), 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 12:22:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31170 states to 31170 states and 136290 transitions. [2023-12-02 12:22:17,983 INFO L78 Accepts]: Start accepts. Automaton has 31170 states and 136290 transitions. Word has length 5 [2023-12-02 12:22:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:17,983 INFO L495 AbstractCegarLoop]: Abstraction has 31170 states and 136290 transitions. [2023-12-02 12:22:17,984 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 12:22:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 31170 states and 136290 transitions. [2023-12-02 12:22:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:22:17,989 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:17,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:22:17,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:17,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1754884568, now seen corresponding path program 1 times [2023-12-02 12:22:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:17,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691900880] [2023-12-02 12:22:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:18,074 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 12:22:18,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:18,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691900880] [2023-12-02 12:22:18,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691900880] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:18,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:18,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:18,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200363425] [2023-12-02 12:22:18,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:18,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:22:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:18,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:22:18,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:22:18,079 INFO L87 Difference]: Start difference. First operand 31170 states and 136290 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 12:22:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:18,845 INFO L93 Difference]: Finished difference Result 38496 states and 168822 transitions. [2023-12-02 12:22:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:22:18,846 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 12:22:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:19,287 INFO L225 Difference]: With dead ends: 38496 [2023-12-02 12:22:19,287 INFO L226 Difference]: Without dead ends: 38496 [2023-12-02 12:22:19,288 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 12:22:19,290 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 79 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:19,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 87 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:22:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38496 states. [2023-12-02 12:22:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38496 to 38496. [2023-12-02 12:22:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38496 states, 38078 states have (on average 4.433583696622722) internal successors, (168822), 38495 states have internal predecessors, (168822), 0 states have call successors, (0), 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 12:22:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38496 states to 38496 states and 168822 transitions. [2023-12-02 12:22:21,083 INFO L78 Accepts]: Start accepts. Automaton has 38496 states and 168822 transitions. Word has length 7 [2023-12-02 12:22:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:21,084 INFO L495 AbstractCegarLoop]: Abstraction has 38496 states and 168822 transitions. [2023-12-02 12:22:21,084 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 12:22:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 38496 states and 168822 transitions. [2023-12-02 12:22:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 12:22:21,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:21,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:21,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:22:21,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:21,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash -255911787, now seen corresponding path program 1 times [2023-12-02 12:22:21,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:21,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513847560] [2023-12-02 12:22:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:21,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:21,166 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 12:22:21,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:21,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513847560] [2023-12-02 12:22:21,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513847560] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:21,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:21,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:22:21,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722360761] [2023-12-02 12:22:21,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:21,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:21,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:21,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:21,170 INFO L87 Difference]: Start difference. First operand 38496 states and 168822 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:21,728 INFO L93 Difference]: Finished difference Result 35026 states and 153556 transitions. [2023-12-02 12:22:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:21,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 12:22:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:21,918 INFO L225 Difference]: With dead ends: 35026 [2023-12-02 12:22:21,918 INFO L226 Difference]: Without dead ends: 35026 [2023-12-02 12:22:21,918 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 12:22:21,920 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:21,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 20 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35026 states. [2023-12-02 12:22:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35026 to 35026. [2023-12-02 12:22:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35026 states, 34692 states have (on average 4.426265421422807) internal successors, (153556), 35025 states have internal predecessors, (153556), 0 states have call successors, (0), 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 12:22:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35026 states to 35026 states and 153556 transitions. [2023-12-02 12:22:23,586 INFO L78 Accepts]: Start accepts. Automaton has 35026 states and 153556 transitions. Word has length 9 [2023-12-02 12:22:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:23,588 INFO L495 AbstractCegarLoop]: Abstraction has 35026 states and 153556 transitions. [2023-12-02 12:22:23,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 35026 states and 153556 transitions. [2023-12-02 12:22:23,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 12:22:23,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:23,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:23,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:22:23,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:23,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:23,605 INFO L85 PathProgramCache]: Analyzing trace with hash -255911786, now seen corresponding path program 1 times [2023-12-02 12:22:23,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:23,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713445794] [2023-12-02 12:22:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:23,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:23,678 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 12:22:23,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:23,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713445794] [2023-12-02 12:22:23,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713445794] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:23,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:23,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:22:23,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105842290] [2023-12-02 12:22:23,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:23,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:23,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:23,682 INFO L87 Difference]: Start difference. First operand 35026 states and 153556 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:24,226 INFO L93 Difference]: Finished difference Result 37792 states and 164152 transitions. [2023-12-02 12:22:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 12:22:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:24,474 INFO L225 Difference]: With dead ends: 37792 [2023-12-02 12:22:24,475 INFO L226 Difference]: Without dead ends: 37724 [2023-12-02 12:22:24,475 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 12:22:24,476 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:24,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37724 states. [2023-12-02 12:22:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37724 to 37424. [2023-12-02 12:22:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37424 states, 37071 states have (on average 4.40136494834237) internal successors, (163163), 37423 states have internal predecessors, (163163), 0 states have call successors, (0), 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 12:22:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37424 states to 37424 states and 163163 transitions. [2023-12-02 12:22:26,380 INFO L78 Accepts]: Start accepts. Automaton has 37424 states and 163163 transitions. Word has length 9 [2023-12-02 12:22:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:26,381 INFO L495 AbstractCegarLoop]: Abstraction has 37424 states and 163163 transitions. [2023-12-02 12:22:26,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 37424 states and 163163 transitions. [2023-12-02 12:22:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:22:26,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:26,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:26,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:22:26,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:26,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash 603171873, now seen corresponding path program 1 times [2023-12-02 12:22:26,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:26,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965701761] [2023-12-02 12:22:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:26,472 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 12:22:26,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:26,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965701761] [2023-12-02 12:22:26,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965701761] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:26,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:26,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:22:26,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191672926] [2023-12-02 12:22:26,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:26,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:22:26,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:22:26,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:22:26,475 INFO L87 Difference]: Start difference. First operand 37424 states and 163163 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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 12:22:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:27,581 INFO L93 Difference]: Finished difference Result 75914 states and 327830 transitions. [2023-12-02 12:22:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:22:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 12:22:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:28,069 INFO L225 Difference]: With dead ends: 75914 [2023-12-02 12:22:28,069 INFO L226 Difference]: Without dead ends: 75878 [2023-12-02 12:22:28,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 12:22:28,070 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 130 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:28,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 66 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75878 states. [2023-12-02 12:22:30,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75878 to 68356. [2023-12-02 12:22:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68356 states, 67952 states have (on average 4.525444431363315) internal successors, (307513), 68355 states have internal predecessors, (307513), 0 states have call successors, (0), 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 12:22:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68356 states to 68356 states and 307513 transitions. [2023-12-02 12:22:31,109 INFO L78 Accepts]: Start accepts. Automaton has 68356 states and 307513 transitions. Word has length 10 [2023-12-02 12:22:31,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:31,109 INFO L495 AbstractCegarLoop]: Abstraction has 68356 states and 307513 transitions. [2023-12-02 12:22:31,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 12:22:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 68356 states and 307513 transitions. [2023-12-02 12:22:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:22:31,111 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:31,111 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:31,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:22:31,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:31,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1423763014, now seen corresponding path program 1 times [2023-12-02 12:22:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:31,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391228809] [2023-12-02 12:22:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:31,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:31,178 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 12:22:31,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391228809] [2023-12-02 12:22:31,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391228809] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:31,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917792317] [2023-12-02 12:22:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:31,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:31,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:31,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:22:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:31,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:22:31,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:31,329 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 12:22:31,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:22:31,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917792317] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:31,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:22:31,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-12-02 12:22:31,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397228102] [2023-12-02 12:22:31,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:31,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:22:31,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:31,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:22:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:22:31,331 INFO L87 Difference]: Start difference. First operand 68356 states and 307513 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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 12:22:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:32,545 INFO L93 Difference]: Finished difference Result 83802 states and 375820 transitions. [2023-12-02 12:22:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:22:32,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 12:22:32,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:33,050 INFO L225 Difference]: With dead ends: 83802 [2023-12-02 12:22:33,050 INFO L226 Difference]: Without dead ends: 83802 [2023-12-02 12:22:33,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 12:22:33,052 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 93 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:33,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 56 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83802 states. [2023-12-02 12:22:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83802 to 64784. [2023-12-02 12:22:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64784 states, 64465 states have (on average 4.507127898859847) internal successors, (290552), 64783 states have internal predecessors, (290552), 0 states have call successors, (0), 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 12:22:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64784 states to 64784 states and 290552 transitions. [2023-12-02 12:22:36,460 INFO L78 Accepts]: Start accepts. Automaton has 64784 states and 290552 transitions. Word has length 10 [2023-12-02 12:22:36,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:36,460 INFO L495 AbstractCegarLoop]: Abstraction has 64784 states and 290552 transitions. [2023-12-02 12:22:36,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 12:22:36,461 INFO L276 IsEmpty]: Start isEmpty. Operand 64784 states and 290552 transitions. [2023-12-02 12:22:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 12:22:36,463 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:36,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:36,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:22:36,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:36,664 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:36,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:36,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1118074568, now seen corresponding path program 1 times [2023-12-02 12:22:36,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:36,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958555898] [2023-12-02 12:22:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:36,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:36,738 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 12:22:36,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958555898] [2023-12-02 12:22:36,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958555898] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:36,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:36,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:36,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975632054] [2023-12-02 12:22:36,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:36,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:22:36,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:22:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:22:36,742 INFO L87 Difference]: Start difference. First operand 64784 states and 290552 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:38,151 INFO L93 Difference]: Finished difference Result 82796 states and 372050 transitions. [2023-12-02 12:22:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:22:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 12:22:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:38,617 INFO L225 Difference]: With dead ends: 82796 [2023-12-02 12:22:38,617 INFO L226 Difference]: Without dead ends: 82796 [2023-12-02 12:22:38,617 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 12:22:38,618 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 77 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:38,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 87 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:22:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82796 states. [2023-12-02 12:22:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82796 to 82796. [2023-12-02 12:22:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82796 states, 82477 states have (on average 4.510954569152612) internal successors, (372050), 82795 states have internal predecessors, (372050), 0 states have call successors, (0), 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 12:22:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82796 states to 82796 states and 372050 transitions. [2023-12-02 12:22:42,363 INFO L78 Accepts]: Start accepts. Automaton has 82796 states and 372050 transitions. Word has length 11 [2023-12-02 12:22:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:42,364 INFO L495 AbstractCegarLoop]: Abstraction has 82796 states and 372050 transitions. [2023-12-02 12:22:42,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 82796 states and 372050 transitions. [2023-12-02 12:22:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:22:42,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:42,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:42,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:22:42,366 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:42,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash -172399453, now seen corresponding path program 1 times [2023-12-02 12:22:42,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:42,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737572956] [2023-12-02 12:22:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:42,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:42,433 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 12:22:42,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737572956] [2023-12-02 12:22:42,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737572956] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:42,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:42,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:42,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928934718] [2023-12-02 12:22:42,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:42,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:22:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:22:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:22:42,436 INFO L87 Difference]: Start difference. First operand 82796 states and 372050 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 12:22:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:44,580 INFO L93 Difference]: Finished difference Result 114136 states and 512357 transitions. [2023-12-02 12:22:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:22:44,580 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 12:22:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:45,374 INFO L225 Difference]: With dead ends: 114136 [2023-12-02 12:22:45,374 INFO L226 Difference]: Without dead ends: 114028 [2023-12-02 12:22:45,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:22:45,375 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 76 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:45,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 95 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:45,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114028 states. [2023-12-02 12:22:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114028 to 109910. [2023-12-02 12:22:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109910 states, 109591 states have (on average 4.5407560839849985) internal successors, (497626), 109909 states have internal predecessors, (497626), 0 states have call successors, (0), 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 12:22:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109910 states to 109910 states and 497626 transitions. [2023-12-02 12:22:50,233 INFO L78 Accepts]: Start accepts. Automaton has 109910 states and 497626 transitions. Word has length 12 [2023-12-02 12:22:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:50,234 INFO L495 AbstractCegarLoop]: Abstraction has 109910 states and 497626 transitions. [2023-12-02 12:22:50,234 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 12:22:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 109910 states and 497626 transitions. [2023-12-02 12:22:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:22:50,238 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:50,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:50,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:22:50,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:50,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:50,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1858327133, now seen corresponding path program 1 times [2023-12-02 12:22:50,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:50,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436111123] [2023-12-02 12:22:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:50,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:50,318 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 12:22:50,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:50,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436111123] [2023-12-02 12:22:50,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436111123] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:50,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982248887] [2023-12-02 12:22:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:50,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:50,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:50,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:50,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:22:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:50,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:22:50,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:50,475 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 12:22:50,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:22:50,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982248887] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:50,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:22:50,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-12-02 12:22:50,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758759324] [2023-12-02 12:22:50,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:50,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:22:50,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:50,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:22:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:22:50,479 INFO L87 Difference]: Start difference. First operand 109910 states and 497626 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 12:22:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:52,516 INFO L93 Difference]: Finished difference Result 101396 states and 456010 transitions. [2023-12-02 12:22:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:22:52,517 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 12:22:52,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:53,139 INFO L225 Difference]: With dead ends: 101396 [2023-12-02 12:22:53,139 INFO L226 Difference]: Without dead ends: 101396 [2023-12-02 12:22:53,139 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 12:22:53,140 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 150 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:53,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 212 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:22:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101396 states. [2023-12-02 12:22:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101396 to 101396. [2023-12-02 12:22:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101396 states, 101162 states have (on average 4.507720290227556) internal successors, (456010), 101395 states have internal predecessors, (456010), 0 states have call successors, (0), 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 12:22:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101396 states to 101396 states and 456010 transitions. [2023-12-02 12:22:57,355 INFO L78 Accepts]: Start accepts. Automaton has 101396 states and 456010 transitions. Word has length 12 [2023-12-02 12:22:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:57,356 INFO L495 AbstractCegarLoop]: Abstraction has 101396 states and 456010 transitions. [2023-12-02 12:22:57,356 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 12:22:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 101396 states and 456010 transitions. [2023-12-02 12:22:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:22:57,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:57,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 12:22:57,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:22:57,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:57,561 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:22:57,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:57,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1773566754, now seen corresponding path program 1 times [2023-12-02 12:22:57,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:57,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576064000] [2023-12-02 12:22:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:57,640 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 12:22:57,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:57,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576064000] [2023-12-02 12:22:57,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576064000] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:57,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618902817] [2023-12-02 12:22:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:57,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:57,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:57,642 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:57,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:22:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:57,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:22:57,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:57,769 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 12:22:57,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:22:57,835 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 12:22:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618902817] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:22:57,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658954363] [2023-12-02 12:22:57,844 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 12:22:57,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:22:57,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-02 12:22:57,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812368788] [2023-12-02 12:22:57,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:22:57,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:22:57,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:22:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:22:57,848 INFO L87 Difference]: Start difference. First operand 101396 states and 456010 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 12:23:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:01,095 INFO L93 Difference]: Finished difference Result 226978 states and 1033915 transitions. [2023-12-02 12:23:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:23:01,096 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 12:23:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:03,159 INFO L225 Difference]: With dead ends: 226978 [2023-12-02 12:23:03,160 INFO L226 Difference]: Without dead ends: 226978 [2023-12-02 12:23:03,160 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 12:23:03,161 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 409 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:03,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 317 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:23:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226978 states. [2023-12-02 12:23:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226978 to 217854. [2023-12-02 12:23:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217854 states, 217620 states have (on average 4.601897803510707) internal successors, (1001465), 217853 states have internal predecessors, (1001465), 0 states have call successors, (0), 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 12:23:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217854 states to 217854 states and 1001465 transitions. [2023-12-02 12:23:12,712 INFO L78 Accepts]: Start accepts. Automaton has 217854 states and 1001465 transitions. Word has length 13 [2023-12-02 12:23:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:12,712 INFO L495 AbstractCegarLoop]: Abstraction has 217854 states and 1001465 transitions. [2023-12-02 12:23:12,712 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 12:23:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 217854 states and 1001465 transitions. [2023-12-02 12:23:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:23:12,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:12,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:12,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:23:12,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:12,917 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:23:12,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash -270738746, now seen corresponding path program 1 times [2023-12-02 12:23:12,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:12,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542669524] [2023-12-02 12:23:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:12,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:12,950 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 12:23:12,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:12,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542669524] [2023-12-02 12:23:12,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542669524] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:12,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:12,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:23:12,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107461355] [2023-12-02 12:23:12,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:12,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:23:12,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:23:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:23:12,953 INFO L87 Difference]: Start difference. First operand 217854 states and 1001465 transitions. Second operand has 3 states, 2 states have (on average 7.0) 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 12:23:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:15,660 INFO L93 Difference]: Finished difference Result 200548 states and 920665 transitions. [2023-12-02 12:23:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:23:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) 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 12:23:15,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:16,908 INFO L225 Difference]: With dead ends: 200548 [2023-12-02 12:23:16,908 INFO L226 Difference]: Without dead ends: 200548 [2023-12-02 12:23:16,908 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 12:23:16,909 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:16,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 19 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:23:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200548 states. [2023-12-02 12:23:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200548 to 200548. [2023-12-02 12:23:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200548 states, 200370 states have (on average 4.594824574537106) internal successors, (920665), 200547 states have internal predecessors, (920665), 0 states have call successors, (0), 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 12:23:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200548 states to 200548 states and 920665 transitions. [2023-12-02 12:23:25,321 INFO L78 Accepts]: Start accepts. Automaton has 200548 states and 920665 transitions. Word has length 14 [2023-12-02 12:23:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:25,321 INFO L495 AbstractCegarLoop]: Abstraction has 200548 states and 920665 transitions. [2023-12-02 12:23:25,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) 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 12:23:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 200548 states and 920665 transitions. [2023-12-02 12:23:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:23:25,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:25,326 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:25,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 12:23:25,327 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:23:25,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1087577599, now seen corresponding path program 1 times [2023-12-02 12:23:25,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:25,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881435189] [2023-12-02 12:23:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:25,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:25,391 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 12:23:25,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:25,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881435189] [2023-12-02 12:23:25,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881435189] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:23:25,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180013182] [2023-12-02 12:23:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:25,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:25,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:23:25,397 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:23:25,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:23:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:25,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:23:25,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:23:25,513 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 12:23:25,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:23:25,542 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 12:23:25,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180013182] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:23:25,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042234596] [2023-12-02 12:23:25,543 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 12:23:25,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:23:25,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-12-02 12:23:25,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488390432] [2023-12-02 12:23:25,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:23:25,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:23:25,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:23:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:23:25,546 INFO L87 Difference]: Start difference. First operand 200548 states and 920665 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 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 12:23:33,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:33,661 INFO L93 Difference]: Finished difference Result 636000 states and 2925351 transitions. [2023-12-02 12:23:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:23:33,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 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 12:23:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:38,734 INFO L225 Difference]: With dead ends: 636000 [2023-12-02 12:23:38,734 INFO L226 Difference]: Without dead ends: 635912 [2023-12-02 12:23:38,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 12:23:38,735 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 234 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:38,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 103 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:23:40,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635912 states. [2023-12-02 12:24:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635912 to 521196. [2023-12-02 12:24:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521196 states, 520990 states have (on average 4.8638572717326625) internal successors, (2534021), 521195 states have internal predecessors, (2534021), 0 states have call successors, (0), 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 12:24:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521196 states to 521196 states and 2534021 transitions. [2023-12-02 12:24:06,230 INFO L78 Accepts]: Start accepts. Automaton has 521196 states and 2534021 transitions. Word has length 14 [2023-12-02 12:24:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:24:06,230 INFO L495 AbstractCegarLoop]: Abstraction has 521196 states and 2534021 transitions. [2023-12-02 12:24:06,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 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 12:24:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 521196 states and 2534021 transitions. [2023-12-02 12:24:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 12:24:06,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:24:06,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:24:06,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:24:06,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:06,435 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:24:06,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:24:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash 534377224, now seen corresponding path program 1 times [2023-12-02 12:24:06,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:24:06,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340942468] [2023-12-02 12:24:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:06,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:24:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:06,495 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 12:24:06,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:06,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340942468] [2023-12-02 12:24:06,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340942468] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:24:06,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937271432] [2023-12-02 12:24:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:06,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:06,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:24:06,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:24:06,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:24:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:06,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:24:06,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:24:06,617 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 12:24:06,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:24:06,661 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 12:24:06,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937271432] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:24:06,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368742936] [2023-12-02 12:24:06,662 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 12:24:06,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:24:06,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-12-02 12:24:06,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116434146] [2023-12-02 12:24:06,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:24:06,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:24:06,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:24:06,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:24:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:24:06,664 INFO L87 Difference]: Start difference. First operand 521196 states and 2534021 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 12:24:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:24:19,197 INFO L93 Difference]: Finished difference Result 904464 states and 4260263 transitions. [2023-12-02 12:24:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:24:19,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 12:24:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:24:30,135 INFO L225 Difference]: With dead ends: 904464 [2023-12-02 12:24:30,135 INFO L226 Difference]: Without dead ends: 904428 [2023-12-02 12:24:30,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:24:30,136 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 437 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:24:30,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 122 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:24:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904428 states. [2023-12-02 12:25:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904428 to 620060. [2023-12-02 12:25:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620060 states, 619899 states have (on average 4.7953747303996295) internal successors, (2972648), 620059 states have internal predecessors, (2972648), 0 states have call successors, (0), 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 12:25:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620060 states to 620060 states and 2972648 transitions. [2023-12-02 12:25:09,086 INFO L78 Accepts]: Start accepts. Automaton has 620060 states and 2972648 transitions. Word has length 15 [2023-12-02 12:25:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:25:09,086 INFO L495 AbstractCegarLoop]: Abstraction has 620060 states and 2972648 transitions. [2023-12-02 12:25:09,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 12:25:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand 620060 states and 2972648 transitions. [2023-12-02 12:25:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 12:25:09,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:25:09,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:25:09,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:25:09,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23f9ebf-8b0f-4919-b96d-8eec7bfbf8c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:09,296 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread4Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-12-02 12:25:09,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:25:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1813086408, now seen corresponding path program 1 times [2023-12-02 12:25:09,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:25:09,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602696316] [2023-12-02 12:25:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:09,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:25:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:09,344 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 12:25:09,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:25:09,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602696316] [2023-12-02 12:25:09,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602696316] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:25:09,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:25:09,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:25:09,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914779426] [2023-12-02 12:25:09,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:25:09,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:25:09,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:25:09,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:25:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:25:09,346 INFO L87 Difference]: Start difference. First operand 620060 states and 2972648 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)