./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/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_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/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_56b6f482-6886-4b47-9b67-6ab01e1e473c/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 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:19:34,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:19:34,150 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 13:19:34,154 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:19:34,155 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:19:34,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:19:34,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:19:34,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:19:34,180 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:19:34,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:19:34,181 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:19:34,182 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:19:34,183 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:19:34,183 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:19:34,184 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:19:34,184 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:19:34,185 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:19:34,185 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:19:34,186 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:19:34,186 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:19:34,187 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:19:34,187 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:19:34,188 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:19:34,188 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:19:34,189 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:19:34,189 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:19:34,190 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:19:34,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:19:34,190 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:19:34,191 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:19:34,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:19:34,191 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 13:19:34,192 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:19:34,192 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:19:34,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:19:34,192 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:19:34,193 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:19:34,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:19:34,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:19:34,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:19:34,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:19:34,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:19:34,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:19:34,194 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:19:34,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:19:34,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:19:34,195 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:19:34,195 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:19:34,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:19:34,195 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_56b6f482-6886-4b47-9b67-6ab01e1e473c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 [2023-12-02 13:19:34,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:19:34,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:19:34,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:19:34,464 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:19:34,464 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:19:34,465 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-12-02 13:19:37,447 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:19:37,691 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:19:37,691 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-12-02 13:19:37,710 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/data/363dfb2cc/097aaf5eace84ce9a4cab3ac62e95fe1/FLAGeb74706e7 [2023-12-02 13:19:37,723 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/data/363dfb2cc/097aaf5eace84ce9a4cab3ac62e95fe1 [2023-12-02 13:19:37,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:19:37,726 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:19:37,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:19:37,727 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:19:37,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:19:37,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:19:37" (1/1) ... [2023-12-02 13:19:37,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f30e3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:37, skipping insertion in model container [2023-12-02 13:19:37,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:19:37" (1/1) ... [2023-12-02 13:19:37,792 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:19:38,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:19:38,204 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:19:38,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:19:38,318 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:19:38,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38 WrapperNode [2023-12-02 13:19:38,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:19:38,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:19:38,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:19:38,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:19:38,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,385 INFO L138 Inliner]: procedures = 272, calls = 50, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 319 [2023-12-02 13:19:38,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:19:38,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:19:38,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:19:38,390 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:19:38,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,408 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,408 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,421 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,427 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,432 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,436 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:19:38,437 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:19:38,437 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:19:38,437 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:19:38,438 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (1/1) ... [2023-12-02 13:19:38,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:19:38,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:19:38,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:19:38,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:19:38,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:19:38,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:19:38,513 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-02 13:19:38,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:19:38,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:19:38,514 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-02 13:19:38,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:19:38,514 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-02 13:19:38,515 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-02 13:19:38,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:19:38,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:19:38,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:19:38,517 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 13:19:38,695 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:19:38,698 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:19:39,169 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:19:39,378 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:19:39,378 INFO L309 CfgBuilder]: Removed 35 assume(true) statements. [2023-12-02 13:19:39,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:19:39 BoogieIcfgContainer [2023-12-02 13:19:39,379 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:19:39,383 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:19:39,383 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:19:39,387 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:19:39,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:19:37" (1/3) ... [2023-12-02 13:19:39,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e64a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:19:39, skipping insertion in model container [2023-12-02 13:19:39,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:19:38" (2/3) ... [2023-12-02 13:19:39,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e64a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:19:39, skipping insertion in model container [2023-12-02 13:19:39,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:19:39" (3/3) ... [2023-12-02 13:19:39,390 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-12-02 13:19:39,400 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 13:19:39,412 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:19:39,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-12-02 13:19:39,413 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 13:19:39,471 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-02 13:19:39,506 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 132 places, 166 transitions, 339 flow [2023-12-02 13:19:39,648 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3204 states, 3085 states have (on average 2.621393841166937) internal successors, (8087), 3203 states have internal predecessors, (8087), 0 states have call successors, (0), 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 13:19:39,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:19:39,677 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;@503da339, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:19:39,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2023-12-02 13:19:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 3204 states, 3085 states have (on average 2.621393841166937) internal successors, (8087), 3203 states have internal predecessors, (8087), 0 states have call successors, (0), 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 13:19:39,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 13:19:39,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:39,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 13:19:39,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-12-02 13:19:39,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:39,705 INFO L85 PathProgramCache]: Analyzing trace with hash 841702, now seen corresponding path program 1 times [2023-12-02 13:19:39,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:39,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548192389] [2023-12-02 13:19:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:39,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:39,965 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 13:19:39,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:19:39,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548192389] [2023-12-02 13:19:39,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548192389] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:19:39,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:19:39,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:19:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235843121] [2023-12-02 13:19:39,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:19:39,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:19:39,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:19:40,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:19:40,009 INFO L87 Difference]: Start difference. First operand has 3204 states, 3085 states have (on average 2.621393841166937) internal successors, (8087), 3203 states have internal predecessors, (8087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:19:40,288 INFO L93 Difference]: Finished difference Result 3203 states and 6486 transitions. [2023-12-02 13:19:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:19:40,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 13:19:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:19:40,327 INFO L225 Difference]: With dead ends: 3203 [2023-12-02 13:19:40,327 INFO L226 Difference]: Without dead ends: 3188 [2023-12-02 13:19:40,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:19:40,333 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 5 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:19:40,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 183 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:19:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3188 states. [2023-12-02 13:19:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3188 to 3188. [2023-12-02 13:19:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3072 states have (on average 2.10546875) internal successors, (6468), 3187 states have internal predecessors, (6468), 0 states have call successors, (0), 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 13:19:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 6468 transitions. [2023-12-02 13:19:40,487 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 6468 transitions. Word has length 3 [2023-12-02 13:19:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:19:40,487 INFO L495 AbstractCegarLoop]: Abstraction has 3188 states and 6468 transitions. [2023-12-02 13:19:40,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 6468 transitions. [2023-12-02 13:19:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:19:40,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:40,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:19:40,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:19:40,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-12-02 13:19:40,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash 26093704, now seen corresponding path program 1 times [2023-12-02 13:19:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:40,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438741747] [2023-12-02 13:19:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:40,572 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 13:19:40,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:19:40,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438741747] [2023-12-02 13:19:40,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438741747] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:19:40,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:19:40,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:19:40,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998044027] [2023-12-02 13:19:40,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:19:40,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:19:40,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:19:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:19:40,577 INFO L87 Difference]: Start difference. First operand 3188 states and 6468 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:19:40,787 INFO L93 Difference]: Finished difference Result 3191 states and 6471 transitions. [2023-12-02 13:19:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:19:40,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 13:19:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:19:40,806 INFO L225 Difference]: With dead ends: 3191 [2023-12-02 13:19:40,807 INFO L226 Difference]: Without dead ends: 3191 [2023-12-02 13:19:40,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:19:40,808 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:19:40,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 186 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:19:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2023-12-02 13:19:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3191. [2023-12-02 13:19:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3075 states have (on average 2.104390243902439) internal successors, (6471), 3190 states have internal predecessors, (6471), 0 states have call successors, (0), 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 13:19:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6471 transitions. [2023-12-02 13:19:40,912 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6471 transitions. Word has length 4 [2023-12-02 13:19:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:19:40,912 INFO L495 AbstractCegarLoop]: Abstraction has 3191 states and 6471 transitions. [2023-12-02 13:19:40,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6471 transitions. [2023-12-02 13:19:40,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:19:40,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:40,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-12-02 13:19:40,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:19:40,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-12-02 13:19:40,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:40,914 INFO L85 PathProgramCache]: Analyzing trace with hash -30624403, now seen corresponding path program 1 times [2023-12-02 13:19:40,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:40,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997432143] [2023-12-02 13:19:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:40,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:19:40,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:19:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997432143] [2023-12-02 13:19:40,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997432143] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:19:40,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:19:40,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:19:40,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423152991] [2023-12-02 13:19:40,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:19:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:19:40,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:40,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:19:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:19:40,984 INFO L87 Difference]: Start difference. First operand 3191 states and 6471 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:19:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:19:41,123 INFO L93 Difference]: Finished difference Result 3190 states and 6470 transitions. [2023-12-02 13:19:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:19:41,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:19:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:19:41,143 INFO L225 Difference]: With dead ends: 3190 [2023-12-02 13:19:41,143 INFO L226 Difference]: Without dead ends: 3190 [2023-12-02 13:19:41,144 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 13:19:41,145 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:19:41,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:19:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2023-12-02 13:19:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3188. [2023-12-02 13:19:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3073 states have (on average 2.1047835990888384) internal successors, (6468), 3187 states have internal predecessors, (6468), 0 states have call successors, (0), 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 13:19:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 6468 transitions. [2023-12-02 13:19:41,232 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 6468 transitions. Word has length 7 [2023-12-02 13:19:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:19:41,233 INFO L495 AbstractCegarLoop]: Abstraction has 3188 states and 6468 transitions. [2023-12-02 13:19:41,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:19:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 6468 transitions. [2023-12-02 13:19:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 13:19:41,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:41,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:19:41,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:19:41,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-12-02 13:19:41,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash 636103539, now seen corresponding path program 1 times [2023-12-02 13:19:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:41,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216746105] [2023-12-02 13:19:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:41,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:19:41,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:19:41,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216746105] [2023-12-02 13:19:41,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216746105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:19:41,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:19:41,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:19:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54152428] [2023-12-02 13:19:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:19:41,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:19:41,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:19:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:19:41,352 INFO L87 Difference]: Start difference. First operand 3188 states and 6468 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:19:41,557 INFO L93 Difference]: Finished difference Result 3053 states and 6251 transitions. [2023-12-02 13:19:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:19:41,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 13:19:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:19:41,575 INFO L225 Difference]: With dead ends: 3053 [2023-12-02 13:19:41,576 INFO L226 Difference]: Without dead ends: 3053 [2023-12-02 13:19:41,576 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 13:19:41,577 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 83 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:19:41,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 196 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:19:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2023-12-02 13:19:41,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 3053. [2023-12-02 13:19:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 2962 states have (on average 2.1103983794733288) internal successors, (6251), 3052 states have internal predecessors, (6251), 0 states have call successors, (0), 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 13:19:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 6251 transitions. [2023-12-02 13:19:41,654 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 6251 transitions. Word has length 9 [2023-12-02 13:19:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:19:41,654 INFO L495 AbstractCegarLoop]: Abstraction has 3053 states and 6251 transitions. [2023-12-02 13:19:41,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 6251 transitions. [2023-12-02 13:19:41,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 13:19:41,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:41,656 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:19:41,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:19:41,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-12-02 13:19:41,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:41,657 INFO L85 PathProgramCache]: Analyzing trace with hash 765699831, now seen corresponding path program 1 times [2023-12-02 13:19:41,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:41,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269656210] [2023-12-02 13:19:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:41,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:19:41,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:19:41,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269656210] [2023-12-02 13:19:41,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269656210] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:19:41,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216233357] [2023-12-02 13:19:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:41,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:19:41,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:19:41,736 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:19:41,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:19:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:41,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:19:41,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:19:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:19:41,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:19:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:19:41,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216233357] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:19:41,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176881638] [2023-12-02 13:19:41,921 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 13:19:41,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:19:41,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-02 13:19:41,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526927103] [2023-12-02 13:19:41,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:19:41,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:19:41,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:19:41,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:19:41,925 INFO L87 Difference]: Start difference. First operand 3053 states and 6251 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:19:42,106 INFO L93 Difference]: Finished difference Result 3059 states and 6257 transitions. [2023-12-02 13:19:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:19:42,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 13:19:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:19:42,123 INFO L225 Difference]: With dead ends: 3059 [2023-12-02 13:19:42,123 INFO L226 Difference]: Without dead ends: 3059 [2023-12-02 13:19:42,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:19:42,125 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:19:42,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 178 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:19:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2023-12-02 13:19:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 3059. [2023-12-02 13:19:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 2968 states have (on average 2.108153638814016) internal successors, (6257), 3058 states have internal predecessors, (6257), 0 states have call successors, (0), 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 13:19:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 6257 transitions. [2023-12-02 13:19:42,212 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 6257 transitions. Word has length 12 [2023-12-02 13:19:42,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:19:42,212 INFO L495 AbstractCegarLoop]: Abstraction has 3059 states and 6257 transitions. [2023-12-02 13:19:42,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 6257 transitions. [2023-12-02 13:19:42,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 13:19:42,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:42,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:19:42,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:19:42,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:19:42,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-12-02 13:19:42,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1462264023, now seen corresponding path program 2 times [2023-12-02 13:19:42,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:42,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972804913] [2023-12-02 13:19:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:42,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:19:42,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:19:42,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972804913] [2023-12-02 13:19:42,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972804913] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:19:42,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351293115] [2023-12-02 13:19:42,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:19:42,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:19:42,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:19:42,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:19:42,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:19:42,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 13:19:42,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:19:42,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:19:42,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:19:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:19:42,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:19:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:19:42,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351293115] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:19:42,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589131581] [2023-12-02 13:19:42,814 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 13:19:42,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:19:42,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-12-02 13:19:42,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22842501] [2023-12-02 13:19:42,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:19:42,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:19:42,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:19:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:19:42,817 INFO L87 Difference]: Start difference. First operand 3059 states and 6257 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 13:19:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:19:43,107 INFO L93 Difference]: Finished difference Result 3071 states and 6269 transitions. [2023-12-02 13:19:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:19:43,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 18 [2023-12-02 13:19:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:19:43,128 INFO L225 Difference]: With dead ends: 3071 [2023-12-02 13:19:43,128 INFO L226 Difference]: Without dead ends: 3071 [2023-12-02 13:19:43,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2023-12-02 13:19:43,133 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 32 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:19:43,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 296 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:19:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2023-12-02 13:19:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3071. [2023-12-02 13:19:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 2980 states have (on average 2.1036912751677854) internal successors, (6269), 3070 states have internal predecessors, (6269), 0 states have call successors, (0), 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 13:19:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 6269 transitions. [2023-12-02 13:19:43,240 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 6269 transitions. Word has length 18 [2023-12-02 13:19:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:19:43,241 INFO L495 AbstractCegarLoop]: Abstraction has 3071 states and 6269 transitions. [2023-12-02 13:19:43,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 13:19:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 6269 transitions. [2023-12-02 13:19:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 13:19:43,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:43,242 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:19:43,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:19:43,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 13:19:43,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-12-02 13:19:43,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:43,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1573854359, now seen corresponding path program 3 times [2023-12-02 13:19:43,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:43,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730387744] [2023-12-02 13:19:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:43,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:19:43,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:19:43,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730387744] [2023-12-02 13:19:43,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730387744] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:19:43,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144779267] [2023-12-02 13:19:43,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:19:43,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:19:43,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:19:43,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:19:43,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:19:43,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:19:43,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:19:43,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:19:43,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:19:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:19:43,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:19:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:19:44,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144779267] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:19:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [63999875] [2023-12-02 13:19:44,136 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 13:19:44,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:19:44,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 20 [2023-12-02 13:19:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963785008] [2023-12-02 13:19:44,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:19:44,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 13:19:44,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 13:19:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:19:44,138 INFO L87 Difference]: Start difference. First operand 3071 states and 6269 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:44,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:19:44,669 INFO L93 Difference]: Finished difference Result 3080 states and 6278 transitions. [2023-12-02 13:19:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 13:19:44,670 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 13:19:44,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:19:44,687 INFO L225 Difference]: With dead ends: 3080 [2023-12-02 13:19:44,688 INFO L226 Difference]: Without dead ends: 3080 [2023-12-02 13:19:44,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2023-12-02 13:19:44,689 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:19:44,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 591 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:19:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2023-12-02 13:19:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 3080. [2023-12-02 13:19:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 2989 states have (on average 2.1003680160588827) internal successors, (6278), 3079 states have internal predecessors, (6278), 0 states have call successors, (0), 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 13:19:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 6278 transitions. [2023-12-02 13:19:44,760 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 6278 transitions. Word has length 30 [2023-12-02 13:19:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:19:44,761 INFO L495 AbstractCegarLoop]: Abstraction has 3080 states and 6278 transitions. [2023-12-02 13:19:44,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 6278 transitions. [2023-12-02 13:19:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 13:19:44,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:44,763 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:19:44,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 13:19:44,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:19:44,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-12-02 13:19:44,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1433851740, now seen corresponding path program 4 times [2023-12-02 13:19:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:44,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772391007] [2023-12-02 13:19:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:44,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:19:45,003 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 13:19:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:19:45,050 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 13:19:45,050 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 13:19:45,051 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2023-12-02 13:19:45,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 29 remaining) [2023-12-02 13:19:45,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 29 remaining) [2023-12-02 13:19:45,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 29 remaining) [2023-12-02 13:19:45,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 29 remaining) [2023-12-02 13:19:45,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 29 remaining) [2023-12-02 13:19:45,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 29 remaining) [2023-12-02 13:19:45,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 29 remaining) [2023-12-02 13:19:45,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 29 remaining) [2023-12-02 13:19:45,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 29 remaining) [2023-12-02 13:19:45,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 29 remaining) [2023-12-02 13:19:45,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 29 remaining) [2023-12-02 13:19:45,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 29 remaining) [2023-12-02 13:19:45,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 29 remaining) [2023-12-02 13:19:45,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 29 remaining) [2023-12-02 13:19:45,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 29 remaining) [2023-12-02 13:19:45,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 29 remaining) [2023-12-02 13:19:45,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 29 remaining) [2023-12-02 13:19:45,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 29 remaining) [2023-12-02 13:19:45,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 29 remaining) [2023-12-02 13:19:45,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 29 remaining) [2023-12-02 13:19:45,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 29 remaining) [2023-12-02 13:19:45,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 29 remaining) [2023-12-02 13:19:45,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 29 remaining) [2023-12-02 13:19:45,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 29 remaining) [2023-12-02 13:19:45,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 29 remaining) [2023-12-02 13:19:45,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 29 remaining) [2023-12-02 13:19:45,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 29 remaining) [2023-12-02 13:19:45,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 29 remaining) [2023-12-02 13:19:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:19:45,061 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2023-12-02 13:19:45,063 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 13:19:45,064 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 13:19:45,109 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-02 13:19:45,113 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 173 places, 218 transitions, 452 flow [2023-12-02 13:19:48,736 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 125352 states, 124477 states have (on average 3.8270202527374537) internal successors, (476376), 125351 states have internal predecessors, (476376), 0 states have call successors, (0), 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 13:19:48,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:19:48,738 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;@503da339, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:19:48,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-12-02 13:19:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 125352 states, 124477 states have (on average 3.8270202527374537) internal successors, (476376), 125351 states have internal predecessors, (476376), 0 states have call successors, (0), 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 13:19:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 13:19:49,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:49,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 13:19:49,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:19:49,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1058176, now seen corresponding path program 1 times [2023-12-02 13:19:49,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:49,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873164049] [2023-12-02 13:19:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:49,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:49,184 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 13:19:49,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:19:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873164049] [2023-12-02 13:19:49,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873164049] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:19:49,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:19:49,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:19:49,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358493089] [2023-12-02 13:19:49,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:19:49,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:19:49,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:49,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:19:49,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:19:49,460 INFO L87 Difference]: Start difference. First operand has 125352 states, 124477 states have (on average 3.8270202527374537) internal successors, (476376), 125351 states have internal predecessors, (476376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:19:51,030 INFO L93 Difference]: Finished difference Result 125351 states and 381835 transitions. [2023-12-02 13:19:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:19:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 13:19:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:19:51,858 INFO L225 Difference]: With dead ends: 125351 [2023-12-02 13:19:51,858 INFO L226 Difference]: Without dead ends: 125334 [2023-12-02 13:19:51,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:19:51,859 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 5 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:19:51,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 240 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:19:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125334 states. [2023-12-02 13:19:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125334 to 125334. [2023-12-02 13:19:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125334 states, 124464 states have (on average 3.067650083558298) internal successors, (381812), 125333 states have internal predecessors, (381812), 0 states have call successors, (0), 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 13:19:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125334 states to 125334 states and 381812 transitions. [2023-12-02 13:19:56,377 INFO L78 Accepts]: Start accepts. Automaton has 125334 states and 381812 transitions. Word has length 3 [2023-12-02 13:19:56,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:19:56,377 INFO L495 AbstractCegarLoop]: Abstraction has 125334 states and 381812 transitions. [2023-12-02 13:19:56,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:56,378 INFO L276 IsEmpty]: Start isEmpty. Operand 125334 states and 381812 transitions. [2023-12-02 13:19:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:19:56,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:19:56,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:19:56,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:19:56,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:19:56,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:19:56,379 INFO L85 PathProgramCache]: Analyzing trace with hash 32804616, now seen corresponding path program 1 times [2023-12-02 13:19:56,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:19:56,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705799183] [2023-12-02 13:19:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:19:56,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:19:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:19:56,408 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 13:19:56,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:19:56,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705799183] [2023-12-02 13:19:56,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705799183] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:19:56,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:19:56,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:19:56,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664262710] [2023-12-02 13:19:56,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:19:56,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:19:56,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:56,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:19:56,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:19:56,412 INFO L87 Difference]: Start difference. First operand 125334 states and 381812 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:19:57,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:19:57,543 INFO L93 Difference]: Finished difference Result 125337 states and 381815 transitions. [2023-12-02 13:19:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:19:57,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 13:19:57,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:19:58,013 INFO L225 Difference]: With dead ends: 125337 [2023-12-02 13:19:58,013 INFO L226 Difference]: Without dead ends: 125337 [2023-12-02 13:19:58,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:19:58,014 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:19:58,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 243 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:19:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125337 states. [2023-12-02 13:20:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125337 to 125337. [2023-12-02 13:20:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125337 states, 124467 states have (on average 3.067600247455149) internal successors, (381815), 125336 states have internal predecessors, (381815), 0 states have call successors, (0), 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 13:20:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125337 states to 125337 states and 381815 transitions. [2023-12-02 13:20:02,281 INFO L78 Accepts]: Start accepts. Automaton has 125337 states and 381815 transitions. Word has length 4 [2023-12-02 13:20:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:02,281 INFO L495 AbstractCegarLoop]: Abstraction has 125337 states and 381815 transitions. [2023-12-02 13:20:02,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:20:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 125337 states and 381815 transitions. [2023-12-02 13:20:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:20:02,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:02,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-12-02 13:20:02,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 13:20:02,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:20:02,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1969091449, now seen corresponding path program 1 times [2023-12-02 13:20:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:02,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907629891] [2023-12-02 13:20:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:20:02,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:02,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907629891] [2023-12-02 13:20:02,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907629891] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:02,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:02,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:20:02,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133690209] [2023-12-02 13:20:02,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:02,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:02,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:02,312 INFO L87 Difference]: Start difference. First operand 125337 states and 381815 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:20:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:03,505 INFO L93 Difference]: Finished difference Result 125336 states and 381814 transitions. [2023-12-02 13:20:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:03,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:20:03,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:04,038 INFO L225 Difference]: With dead ends: 125336 [2023-12-02 13:20:04,039 INFO L226 Difference]: Without dead ends: 125336 [2023-12-02 13:20:04,039 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 13:20:04,040 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:04,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125336 states. [2023-12-02 13:20:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125336 to 125334. [2023-12-02 13:20:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125334 states, 124465 states have (on average 3.0676254368698026) internal successors, (381812), 125333 states have internal predecessors, (381812), 0 states have call successors, (0), 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 13:20:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125334 states to 125334 states and 381812 transitions. [2023-12-02 13:20:08,062 INFO L78 Accepts]: Start accepts. Automaton has 125334 states and 381812 transitions. Word has length 7 [2023-12-02 13:20:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:08,063 INFO L495 AbstractCegarLoop]: Abstraction has 125334 states and 381812 transitions. [2023-12-02 13:20:08,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:20:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 125334 states and 381812 transitions. [2023-12-02 13:20:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 13:20:08,063 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:08,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:08,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 13:20:08,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:20:08,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:08,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1785133823, now seen corresponding path program 1 times [2023-12-02 13:20:08,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:08,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767321413] [2023-12-02 13:20:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:08,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:20:08,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:08,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767321413] [2023-12-02 13:20:08,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767321413] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:08,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:08,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:08,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642127813] [2023-12-02 13:20:08,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:08,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:20:08,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:20:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:20:08,112 INFO L87 Difference]: Start difference. First operand 125334 states and 381812 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:20:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:09,048 INFO L93 Difference]: Finished difference Result 125199 states and 381595 transitions. [2023-12-02 13:20:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:20:09,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 13:20:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:09,962 INFO L225 Difference]: With dead ends: 125199 [2023-12-02 13:20:09,962 INFO L226 Difference]: Without dead ends: 125199 [2023-12-02 13:20:09,963 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 13:20:09,963 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 83 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:09,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 258 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:20:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125199 states. [2023-12-02 13:20:13,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125199 to 125199. [2023-12-02 13:20:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125199 states, 124354 states have (on average 3.068618621033501) internal successors, (381595), 125198 states have internal predecessors, (381595), 0 states have call successors, (0), 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 13:20:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125199 states to 125199 states and 381595 transitions. [2023-12-02 13:20:13,935 INFO L78 Accepts]: Start accepts. Automaton has 125199 states and 381595 transitions. Word has length 9 [2023-12-02 13:20:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:13,936 INFO L495 AbstractCegarLoop]: Abstraction has 125199 states and 381595 transitions. [2023-12-02 13:20:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:20:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 125199 states and 381595 transitions. [2023-12-02 13:20:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 13:20:13,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:13,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:13,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 13:20:13,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:20:13,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:13,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1294963971, now seen corresponding path program 1 times [2023-12-02 13:20:13,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:13,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35509008] [2023-12-02 13:20:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:20:13,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:13,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35509008] [2023-12-02 13:20:13,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35509008] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:13,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284179103] [2023-12-02 13:20:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:13,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:13,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:13,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:13,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:20:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:14,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:20:14,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:20:14,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:20:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:20:14,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284179103] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:20:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162431098] [2023-12-02 13:20:14,144 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 13:20:14,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:20:14,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-02 13:20:14,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866235583] [2023-12-02 13:20:14,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:20:14,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:20:14,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:20:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:20:14,146 INFO L87 Difference]: Start difference. First operand 125199 states and 381595 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:20:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:15,476 INFO L93 Difference]: Finished difference Result 125205 states and 381601 transitions. [2023-12-02 13:20:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:20:15,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 13:20:15,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:15,927 INFO L225 Difference]: With dead ends: 125205 [2023-12-02 13:20:15,928 INFO L226 Difference]: Without dead ends: 125205 [2023-12-02 13:20:15,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:20:15,928 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 12 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:15,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 401 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:20:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125205 states. [2023-12-02 13:20:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125205 to 125205. [2023-12-02 13:20:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125205 states, 124360 states have (on average 3.068518816339659) internal successors, (381601), 125204 states have internal predecessors, (381601), 0 states have call successors, (0), 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 13:20:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125205 states to 125205 states and 381601 transitions. [2023-12-02 13:20:20,315 INFO L78 Accepts]: Start accepts. Automaton has 125205 states and 381601 transitions. Word has length 14 [2023-12-02 13:20:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:20,318 INFO L495 AbstractCegarLoop]: Abstraction has 125205 states and 381601 transitions. [2023-12-02 13:20:20,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:20:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 125205 states and 381601 transitions. [2023-12-02 13:20:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 13:20:20,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:20,319 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:20,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:20:20,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 13:20:20,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:20:20,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1595474275, now seen corresponding path program 2 times [2023-12-02 13:20:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:20,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637882497] [2023-12-02 13:20:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:20,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:20:20,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:20,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637882497] [2023-12-02 13:20:20,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637882497] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:20,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080953173] [2023-12-02 13:20:20,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:20:20,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:20,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:20,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:20,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:20:20,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:20:20,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:20:20,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:20:20,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:20:20,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080953173] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:20,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-12-02 13:20:20,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505292027] [2023-12-02 13:20:20,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:20:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:20:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:20:20,760 INFO L87 Difference]: Start difference. First operand 125205 states and 381601 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 13:20:21,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:21,674 INFO L93 Difference]: Finished difference Result 123684 states and 376960 transitions. [2023-12-02 13:20:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:20:21,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 20 [2023-12-02 13:20:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:22,129 INFO L225 Difference]: With dead ends: 123684 [2023-12-02 13:20:22,129 INFO L226 Difference]: Without dead ends: 123684 [2023-12-02 13:20:22,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:20:22,130 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 248 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:22,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 271 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:20:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123684 states. [2023-12-02 13:20:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123684 to 123684. [2023-12-02 13:20:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123684 states, 122888 states have (on average 3.0675086257405115) internal successors, (376960), 123683 states have internal predecessors, (376960), 0 states have call successors, (0), 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 13:20:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123684 states to 123684 states and 376960 transitions. [2023-12-02 13:20:26,446 INFO L78 Accepts]: Start accepts. Automaton has 123684 states and 376960 transitions. Word has length 20 [2023-12-02 13:20:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:26,446 INFO L495 AbstractCegarLoop]: Abstraction has 123684 states and 376960 transitions. [2023-12-02 13:20:26,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 13:20:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 123684 states and 376960 transitions. [2023-12-02 13:20:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:20:26,448 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:26,448 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:26,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:20:26,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 13:20:26,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:20:26,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2079906128, now seen corresponding path program 1 times [2023-12-02 13:20:26,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:26,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136126453] [2023-12-02 13:20:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:26,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 13:20:26,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136126453] [2023-12-02 13:20:26,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136126453] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:26,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:26,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601367981] [2023-12-02 13:20:26,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:26,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:20:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:20:26,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:20:26,702 INFO L87 Difference]: Start difference. First operand 123684 states and 376960 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:20:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:27,588 INFO L93 Difference]: Finished difference Result 122163 states and 372319 transitions. [2023-12-02 13:20:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:20:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-02 13:20:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:28,039 INFO L225 Difference]: With dead ends: 122163 [2023-12-02 13:20:28,039 INFO L226 Difference]: Without dead ends: 122163 [2023-12-02 13:20:28,039 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 13:20:28,040 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 164 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:28,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 271 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:20:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122163 states. [2023-12-02 13:20:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122163 to 122163. [2023-12-02 13:20:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122163 states, 121416 states have (on average 3.0664739408315214) internal successors, (372319), 122162 states have internal predecessors, (372319), 0 states have call successors, (0), 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 13:20:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122163 states to 122163 states and 372319 transitions. [2023-12-02 13:20:32,008 INFO L78 Accepts]: Start accepts. Automaton has 122163 states and 372319 transitions. Word has length 21 [2023-12-02 13:20:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:32,008 INFO L495 AbstractCegarLoop]: Abstraction has 122163 states and 372319 transitions. [2023-12-02 13:20:32,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:20:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 122163 states and 372319 transitions. [2023-12-02 13:20:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:20:32,009 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:32,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:32,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 13:20:32,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:20:32,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash 826762220, now seen corresponding path program 1 times [2023-12-02 13:20:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:32,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522789631] [2023-12-02 13:20:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:20:32,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:32,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522789631] [2023-12-02 13:20:32,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522789631] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:32,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672130714] [2023-12-02 13:20:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:32,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:32,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:32,115 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:32,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:20:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:32,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:20:32,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:20:32,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:20:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:20:32,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672130714] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:20:32,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917253751] [2023-12-02 13:20:32,352 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 13:20:32,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:20:32,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-12-02 13:20:32,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905673898] [2023-12-02 13:20:32,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:20:32,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:20:32,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:32,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:20:32,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 13:20:32,355 INFO L87 Difference]: Start difference. First operand 122163 states and 372319 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 13:20:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:33,295 INFO L93 Difference]: Finished difference Result 122175 states and 372331 transitions. [2023-12-02 13:20:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:20:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 23 [2023-12-02 13:20:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:34,094 INFO L225 Difference]: With dead ends: 122175 [2023-12-02 13:20:34,094 INFO L226 Difference]: Without dead ends: 122175 [2023-12-02 13:20:34,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-12-02 13:20:34,095 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 26 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:34,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 547 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:20:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122175 states. [2023-12-02 13:20:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122175 to 122175. [2023-12-02 13:20:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122175 states, 121428 states have (on average 3.066269723622229) internal successors, (372331), 122174 states have internal predecessors, (372331), 0 states have call successors, (0), 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 13:20:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122175 states to 122175 states and 372331 transitions. [2023-12-02 13:20:37,300 INFO L78 Accepts]: Start accepts. Automaton has 122175 states and 372331 transitions. Word has length 23 [2023-12-02 13:20:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:37,301 INFO L495 AbstractCegarLoop]: Abstraction has 122175 states and 372331 transitions. [2023-12-02 13:20:37,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 13:20:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 122175 states and 372331 transitions. [2023-12-02 13:20:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 13:20:37,302 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:37,302 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:37,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:20:37,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:37,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:20:37,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:37,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1232560980, now seen corresponding path program 2 times [2023-12-02 13:20:37,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:37,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518714307] [2023-12-02 13:20:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:37,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:20:37,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:37,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518714307] [2023-12-02 13:20:37,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518714307] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:37,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177558100] [2023-12-02 13:20:37,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:20:37,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:37,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:37,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:37,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:20:37,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 13:20:37,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:20:37,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:20:37,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:37,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-12-02 13:20:38,027 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:20:38,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 13:20:38,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-02 13:20:38,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-12-02 13:20:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-02 13:20:38,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:38,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177558100] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:38,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:38,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 21 [2023-12-02 13:20:38,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274145447] [2023-12-02 13:20:38,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:38,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:20:38,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:20:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-12-02 13:20:38,163 INFO L87 Difference]: Start difference. First operand 122175 states and 372331 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:20:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:40,228 INFO L93 Difference]: Finished difference Result 163800 states and 502988 transitions. [2023-12-02 13:20:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:20:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-02 13:20:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:40,894 INFO L225 Difference]: With dead ends: 163800 [2023-12-02 13:20:40,894 INFO L226 Difference]: Without dead ends: 163800 [2023-12-02 13:20:40,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2023-12-02 13:20:40,895 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 781 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:40,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 595 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:20:41,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163800 states. [2023-12-02 13:20:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163800 to 152040. [2023-12-02 13:20:44,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152040 states, 151293 states have (on average 3.0974731150813324) internal successors, (468626), 152039 states have internal predecessors, (468626), 0 states have call successors, (0), 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 13:20:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152040 states to 152040 states and 468626 transitions. [2023-12-02 13:20:45,376 INFO L78 Accepts]: Start accepts. Automaton has 152040 states and 468626 transitions. Word has length 35 [2023-12-02 13:20:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:45,376 INFO L495 AbstractCegarLoop]: Abstraction has 152040 states and 468626 transitions. [2023-12-02 13:20:45,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:20:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 152040 states and 468626 transitions. [2023-12-02 13:20:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 13:20:45,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:45,378 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:20:45,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:20:45,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:45,578 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:20:45,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:45,578 INFO L85 PathProgramCache]: Analyzing trace with hash -429288935, now seen corresponding path program 1 times [2023-12-02 13:20:45,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:45,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731207515] [2023-12-02 13:20:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:45,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 13:20:45,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731207515] [2023-12-02 13:20:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731207515] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073102606] [2023-12-02 13:20:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:45,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:45,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:45,802 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:45,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:20:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:45,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:20:45,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 13:20:45,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:20:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 13:20:46,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073102606] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:20:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1511751681] [2023-12-02 13:20:46,132 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 13:20:46,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:20:46,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 20 [2023-12-02 13:20:46,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450107589] [2023-12-02 13:20:46,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:20:46,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 13:20:46,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:46,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 13:20:46,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:20:46,135 INFO L87 Difference]: Start difference. First operand 152040 states and 468626 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 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 13:20:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:47,329 INFO L93 Difference]: Finished difference Result 152049 states and 468635 transitions. [2023-12-02 13:20:47,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 13:20:47,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-02 13:20:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:48,421 INFO L225 Difference]: With dead ends: 152049 [2023-12-02 13:20:48,421 INFO L226 Difference]: Without dead ends: 152049 [2023-12-02 13:20:48,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2023-12-02 13:20:48,422 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 62 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:48,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 547 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:20:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152049 states. [2023-12-02 13:20:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152049 to 152049. [2023-12-02 13:20:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152049 states, 151302 states have (on average 3.0973483496582994) internal successors, (468635), 152048 states have internal predecessors, (468635), 0 states have call successors, (0), 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 13:20:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152049 states to 152049 states and 468635 transitions. [2023-12-02 13:20:52,343 INFO L78 Accepts]: Start accepts. Automaton has 152049 states and 468635 transitions. Word has length 35 [2023-12-02 13:20:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:52,343 INFO L495 AbstractCegarLoop]: Abstraction has 152049 states and 468635 transitions. [2023-12-02 13:20:52,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 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 13:20:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 152049 states and 468635 transitions. [2023-12-02 13:20:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 13:20:52,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:52,345 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:20:52,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 13:20:52,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b6f482-6886-4b47-9b67-6ab01e1e473c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:20:52,546 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-12-02 13:20:52,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:52,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1917200294, now seen corresponding path program 2 times [2023-12-02 13:20:52,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:52,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695393446] [2023-12-02 13:20:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:52,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:20:52,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 13:20:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 13:20:52,592 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 13:20:52,592 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 13:20:52,592 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (34 of 35 remaining) [2023-12-02 13:20:52,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (33 of 35 remaining) [2023-12-02 13:20:52,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (32 of 35 remaining) [2023-12-02 13:20:52,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 35 remaining) [2023-12-02 13:20:52,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 35 remaining) [2023-12-02 13:20:52,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 35 remaining) [2023-12-02 13:20:52,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 35 remaining) [2023-12-02 13:20:52,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 35 remaining) [2023-12-02 13:20:52,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 35 remaining) [2023-12-02 13:20:52,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 35 remaining) [2023-12-02 13:20:52,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 35 remaining) [2023-12-02 13:20:52,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 35 remaining) [2023-12-02 13:20:52,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 35 remaining) [2023-12-02 13:20:52,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 35 remaining) [2023-12-02 13:20:52,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 35 remaining) [2023-12-02 13:20:52,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 35 remaining) [2023-12-02 13:20:52,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 35 remaining) [2023-12-02 13:20:52,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 35 remaining) [2023-12-02 13:20:52,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 35 remaining) [2023-12-02 13:20:52,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 35 remaining) [2023-12-02 13:20:52,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 35 remaining) [2023-12-02 13:20:52,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 35 remaining) [2023-12-02 13:20:52,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 35 remaining) [2023-12-02 13:20:52,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 35 remaining) [2023-12-02 13:20:52,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 35 remaining) [2023-12-02 13:20:52,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 35 remaining) [2023-12-02 13:20:52,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 35 remaining) [2023-12-02 13:20:52,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 35 remaining) [2023-12-02 13:20:52,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 35 remaining) [2023-12-02 13:20:52,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 35 remaining) [2023-12-02 13:20:52,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 35 remaining) [2023-12-02 13:20:52,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 35 remaining) [2023-12-02 13:20:52,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 35 remaining) [2023-12-02 13:20:52,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 35 remaining) [2023-12-02 13:20:52,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 35 remaining) [2023-12-02 13:20:52,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 13:20:52,598 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:20:52,598 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 13:20:52,598 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 13:20:52,641 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-02 13:20:52,645 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 214 places, 270 transitions, 567 flow