./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:58:59,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:58:59,564 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-24 23:58:59,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:58:59,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:58:59,611 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:58:59,612 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:58:59,613 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:58:59,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:58:59,618 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:58:59,619 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:58:59,620 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:58:59,620 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:58:59,622 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:58:59,623 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:58:59,623 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:58:59,623 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:58:59,624 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:58:59,624 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:58:59,625 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:58:59,625 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:58:59,626 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:58:59,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:58:59,627 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:58:59,628 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:58:59,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:58:59,629 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:58:59,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:58:59,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:58:59,630 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:58:59,631 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:58:59,631 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:58:59,631 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:58:59,632 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:58:59,632 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:58:59,632 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:58:59,633 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:58:59,633 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:58:59,634 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:58:59,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:58:59,634 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:58:59,635 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:58:59,635 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:58:59,635 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:58:59,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:58:59,636 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:58:59,636 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:58:59,636 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:58:59,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:58:59,637 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_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2023-11-24 23:58:59,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:58:59,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:58:59,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:58:59,980 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:58:59,980 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:58:59,982 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/pthread/stack-2.i [2023-11-24 23:59:03,145 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:59:03,481 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:59:03,482 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/sv-benchmarks/c/pthread/stack-2.i [2023-11-24 23:59:03,520 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/data/402fa0f45/1ec1e2e009c94aedaf8074f441eb46ed/FLAG18392aa77 [2023-11-24 23:59:03,535 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/data/402fa0f45/1ec1e2e009c94aedaf8074f441eb46ed [2023-11-24 23:59:03,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:59:03,539 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:59:03,549 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:59:03,549 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:59:03,555 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:59:03,555 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:59:03" (1/1) ... [2023-11-24 23:59:03,557 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5583a153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:03, skipping insertion in model container [2023-11-24 23:59:03,557 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:59:03" (1/1) ... [2023-11-24 23:59:03,631 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:59:04,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:59:04,166 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:59:04,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:59:04,314 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:59:04,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04 WrapperNode [2023-11-24 23:59:04,315 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:59:04,316 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:59:04,316 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:59:04,316 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:59:04,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,376 INFO L138 Inliner]: procedures = 278, calls = 47, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 179 [2023-11-24 23:59:04,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:59:04,377 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:59:04,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:59:04,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:59:04,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,415 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,415 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,424 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,438 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,440 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,442 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:59:04,447 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:59:04,447 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:59:04,448 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:59:04,465 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (1/1) ... [2023-11-24 23:59:04,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:59:04,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:04,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:59:04,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:59:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-24 23:59:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-24 23:59:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-24 23:59:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-24 23:59:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:59:04,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:59:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 23:59:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:59:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:59:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 23:59:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:59:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:59:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:59:04,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:59:04,563 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 23:59:04,796 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:59:04,799 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:59:05,300 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:59:05,704 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:59:05,705 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:59:05,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:05 BoogieIcfgContainer [2023-11-24 23:59:05,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:59:05,708 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:59:05,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:59:05,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:59:05,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:59:03" (1/3) ... [2023-11-24 23:59:05,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634d560f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:59:05, skipping insertion in model container [2023-11-24 23:59:05,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:04" (2/3) ... [2023-11-24 23:59:05,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634d560f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:59:05, skipping insertion in model container [2023-11-24 23:59:05,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:05" (3/3) ... [2023-11-24 23:59:05,716 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-11-24 23:59:05,726 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 23:59:05,739 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:59:05,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-24 23:59:05,740 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 23:59:05,803 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 23:59:05,835 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 49 transitions, 112 flow [2023-11-24 23:59:05,912 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 680 states, 656 states have (on average 2.7027439024390243) internal successors, (1773), 679 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:05,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:59:05,940 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;@723b753d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:59:05,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-24 23:59:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 680 states, 656 states have (on average 2.7027439024390243) internal successors, (1773), 679 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:59:05,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:05,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:05,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:05,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:05,960 INFO L85 PathProgramCache]: Analyzing trace with hash -934362570, now seen corresponding path program 1 times [2023-11-24 23:59:05,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:05,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940726972] [2023-11-24 23:59:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:05,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:06,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940726972] [2023-11-24 23:59:06,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940726972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:06,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:06,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:59:06,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001739483] [2023-11-24 23:59:06,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:06,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:06,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:06,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:06,508 INFO L87 Difference]: Start difference. First operand has 680 states, 656 states have (on average 2.7027439024390243) internal successors, (1773), 679 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:06,848 INFO L93 Difference]: Finished difference Result 1080 states and 2793 transitions. [2023-11-24 23:59:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:06,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:59:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:06,881 INFO L225 Difference]: With dead ends: 1080 [2023-11-24 23:59:06,882 INFO L226 Difference]: Without dead ends: 1080 [2023-11-24 23:59:06,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:06,888 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:06,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 61 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2023-11-24 23:59:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 942. [2023-11-24 23:59:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 918 states have (on average 2.708061002178649) internal successors, (2486), 941 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2486 transitions. [2023-11-24 23:59:07,013 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2486 transitions. Word has length 8 [2023-11-24 23:59:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:07,014 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 2486 transitions. [2023-11-24 23:59:07,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2486 transitions. [2023-11-24 23:59:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 23:59:07,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:07,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:07,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:59:07,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:07,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash 257188861, now seen corresponding path program 1 times [2023-11-24 23:59:07,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:07,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934311178] [2023-11-24 23:59:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:07,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:07,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934311178] [2023-11-24 23:59:07,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934311178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:07,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:07,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:07,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837394797] [2023-11-24 23:59:07,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:07,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:07,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:07,213 INFO L87 Difference]: Start difference. First operand 942 states and 2486 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:07,389 INFO L93 Difference]: Finished difference Result 940 states and 2418 transitions. [2023-11-24 23:59:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-24 23:59:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:07,400 INFO L225 Difference]: With dead ends: 940 [2023-11-24 23:59:07,400 INFO L226 Difference]: Without dead ends: 940 [2023-11-24 23:59:07,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:07,402 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:07,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 62 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2023-11-24 23:59:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 932. [2023-11-24 23:59:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 908 states have (on average 2.656387665198238) internal successors, (2412), 931 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2412 transitions. [2023-11-24 23:59:07,455 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2412 transitions. Word has length 11 [2023-11-24 23:59:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:07,456 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 2412 transitions. [2023-11-24 23:59:07,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2412 transitions. [2023-11-24 23:59:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:59:07,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:07,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:07,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:59:07,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:07,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:07,472 INFO L85 PathProgramCache]: Analyzing trace with hash -617111179, now seen corresponding path program 1 times [2023-11-24 23:59:07,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:07,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627888422] [2023-11-24 23:59:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:07,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:07,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:07,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627888422] [2023-11-24 23:59:07,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627888422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:07,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:07,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:07,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611006920] [2023-11-24 23:59:07,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:07,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:07,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:07,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:07,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:07,572 INFO L87 Difference]: Start difference. First operand 932 states and 2412 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:07,751 INFO L93 Difference]: Finished difference Result 1622 states and 4228 transitions. [2023-11-24 23:59:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:07,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 23:59:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:07,766 INFO L225 Difference]: With dead ends: 1622 [2023-11-24 23:59:07,766 INFO L226 Difference]: Without dead ends: 1622 [2023-11-24 23:59:07,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:07,768 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 53 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:07,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 62 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2023-11-24 23:59:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1554. [2023-11-24 23:59:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1530 states have (on average 2.6954248366013074) internal successors, (4124), 1553 states have internal predecessors, (4124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4124 transitions. [2023-11-24 23:59:07,833 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4124 transitions. Word has length 12 [2023-11-24 23:59:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:07,834 INFO L495 AbstractCegarLoop]: Abstraction has 1554 states and 4124 transitions. [2023-11-24 23:59:07,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:07,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4124 transitions. [2023-11-24 23:59:07,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:59:07,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:07,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:07,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:59:07,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:07,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:07,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1115197879, now seen corresponding path program 1 times [2023-11-24 23:59:07,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:07,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22856713] [2023-11-24 23:59:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:07,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:07,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:07,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22856713] [2023-11-24 23:59:07,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22856713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:07,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:07,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:07,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706483748] [2023-11-24 23:59:07,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:07,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:07,917 INFO L87 Difference]: Start difference. First operand 1554 states and 4124 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:08,089 INFO L93 Difference]: Finished difference Result 1798 states and 4791 transitions. [2023-11-24 23:59:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 23:59:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:08,105 INFO L225 Difference]: With dead ends: 1798 [2023-11-24 23:59:08,106 INFO L226 Difference]: Without dead ends: 1798 [2023-11-24 23:59:08,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:08,118 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:08,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 62 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2023-11-24 23:59:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1798. [2023-11-24 23:59:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1774 states have (on average 2.7006764374295376) internal successors, (4791), 1797 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 4791 transitions. [2023-11-24 23:59:08,239 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 4791 transitions. Word has length 13 [2023-11-24 23:59:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:08,240 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 4791 transitions. [2023-11-24 23:59:08,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 4791 transitions. [2023-11-24 23:59:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 23:59:08,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:08,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:08,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:59:08,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:08,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash 640355306, now seen corresponding path program 1 times [2023-11-24 23:59:08,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:08,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127171756] [2023-11-24 23:59:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:08,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:08,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127171756] [2023-11-24 23:59:08,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127171756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:08,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:08,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:08,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923441241] [2023-11-24 23:59:08,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:08,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:08,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:08,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:08,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:59:08,401 INFO L87 Difference]: Start difference. First operand 1798 states and 4791 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:08,496 INFO L93 Difference]: Finished difference Result 1310 states and 3293 transitions. [2023-11-24 23:59:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 23:59:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:08,509 INFO L225 Difference]: With dead ends: 1310 [2023-11-24 23:59:08,510 INFO L226 Difference]: Without dead ends: 1310 [2023-11-24 23:59:08,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:59:08,511 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:08,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2023-11-24 23:59:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1306. [2023-11-24 23:59:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1282 states have (on average 2.567082683307332) internal successors, (3291), 1305 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 3291 transitions. [2023-11-24 23:59:08,572 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 3291 transitions. Word has length 18 [2023-11-24 23:59:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:08,573 INFO L495 AbstractCegarLoop]: Abstraction has 1306 states and 3291 transitions. [2023-11-24 23:59:08,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 3291 transitions. [2023-11-24 23:59:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:59:08,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:08,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:59:08,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:08,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash -984839171, now seen corresponding path program 1 times [2023-11-24 23:59:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667149241] [2023-11-24 23:59:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:08,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:08,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667149241] [2023-11-24 23:59:08,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667149241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:08,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826837706] [2023-11-24 23:59:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:08,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:08,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:08,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:08,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:59:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:08,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:08,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:09,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:09,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826837706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:09,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:09,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-24 23:59:09,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697070747] [2023-11-24 23:59:09,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:09,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:59:09,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:09,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:59:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:09,030 INFO L87 Difference]: Start difference. First operand 1306 states and 3291 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:09,280 INFO L93 Difference]: Finished difference Result 1978 states and 4983 transitions. [2023-11-24 23:59:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:59:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-24 23:59:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:09,298 INFO L225 Difference]: With dead ends: 1978 [2023-11-24 23:59:09,298 INFO L226 Difference]: Without dead ends: 1978 [2023-11-24 23:59:09,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:59:09,299 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 94 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:09,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 104 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:09,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2023-11-24 23:59:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1720. [2023-11-24 23:59:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1696 states have (on average 2.6420990566037736) internal successors, (4481), 1719 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 4481 transitions. [2023-11-24 23:59:09,375 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 4481 transitions. Word has length 19 [2023-11-24 23:59:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:09,375 INFO L495 AbstractCegarLoop]: Abstraction has 1720 states and 4481 transitions. [2023-11-24 23:59:09,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 4481 transitions. [2023-11-24 23:59:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:59:09,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:09,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:09,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 23:59:09,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:59:09,594 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:09,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash 524649279, now seen corresponding path program 1 times [2023-11-24 23:59:09,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:09,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215189045] [2023-11-24 23:59:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:09,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:09,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:09,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215189045] [2023-11-24 23:59:09,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215189045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:09,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:09,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:59:09,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016776966] [2023-11-24 23:59:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:09,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:59:09,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:59:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:09,726 INFO L87 Difference]: Start difference. First operand 1720 states and 4481 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:09,995 INFO L93 Difference]: Finished difference Result 2480 states and 6398 transitions. [2023-11-24 23:59:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:59:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-24 23:59:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:10,018 INFO L225 Difference]: With dead ends: 2480 [2023-11-24 23:59:10,018 INFO L226 Difference]: Without dead ends: 2480 [2023-11-24 23:59:10,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:10,020 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:10,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 116 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2023-11-24 23:59:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2204. [2023-11-24 23:59:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2180 states have (on average 2.6394495412844035) internal successors, (5754), 2203 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 5754 transitions. [2023-11-24 23:59:10,118 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 5754 transitions. Word has length 20 [2023-11-24 23:59:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:10,119 INFO L495 AbstractCegarLoop]: Abstraction has 2204 states and 5754 transitions. [2023-11-24 23:59:10,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 5754 transitions. [2023-11-24 23:59:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:59:10,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:10,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:10,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:59:10,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:10,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash -465242723, now seen corresponding path program 1 times [2023-11-24 23:59:10,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:10,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499740824] [2023-11-24 23:59:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:10,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:10,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499740824] [2023-11-24 23:59:10,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499740824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474335364] [2023-11-24 23:59:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:10,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:10,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:10,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:10,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:59:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:10,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:10,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:10,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:10,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474335364] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240694557] [2023-11-24 23:59:10,572 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:59:10,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:10,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-24 23:59:10,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237454182] [2023-11-24 23:59:10,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:10,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:59:10,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:10,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:59:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:59:10,577 INFO L87 Difference]: Start difference. First operand 2204 states and 5754 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:11,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:11,042 INFO L93 Difference]: Finished difference Result 4034 states and 10366 transitions. [2023-11-24 23:59:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:59:11,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-24 23:59:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:11,076 INFO L225 Difference]: With dead ends: 4034 [2023-11-24 23:59:11,076 INFO L226 Difference]: Without dead ends: 4034 [2023-11-24 23:59:11,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:59:11,081 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 218 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:11,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 188 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:59:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2023-11-24 23:59:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 3284. [2023-11-24 23:59:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 3260 states have (on average 2.7) internal successors, (8802), 3283 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 8802 transitions. [2023-11-24 23:59:11,226 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 8802 transitions. Word has length 20 [2023-11-24 23:59:11,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:11,227 INFO L495 AbstractCegarLoop]: Abstraction has 3284 states and 8802 transitions. [2023-11-24 23:59:11,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 8802 transitions. [2023-11-24 23:59:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:59:11,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:11,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:11,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:11,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:11,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:11,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:11,437 INFO L85 PathProgramCache]: Analyzing trace with hash 628033035, now seen corresponding path program 1 times [2023-11-24 23:59:11,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:11,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472580457] [2023-11-24 23:59:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:11,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:11,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:11,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472580457] [2023-11-24 23:59:11,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472580457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:11,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793975404] [2023-11-24 23:59:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:11,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:11,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:11,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:11,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:59:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:11,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:11,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:11,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:11,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793975404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:11,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:11,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-24 23:59:11,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863309335] [2023-11-24 23:59:11,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:11,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:59:11,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:11,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:59:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:11,739 INFO L87 Difference]: Start difference. First operand 3284 states and 8802 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:12,082 INFO L93 Difference]: Finished difference Result 3186 states and 8454 transitions. [2023-11-24 23:59:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:59:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-24 23:59:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:12,125 INFO L225 Difference]: With dead ends: 3186 [2023-11-24 23:59:12,125 INFO L226 Difference]: Without dead ends: 3186 [2023-11-24 23:59:12,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:59:12,128 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 108 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:12,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 138 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2023-11-24 23:59:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 3142. [2023-11-24 23:59:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3123 states have (on average 2.6884406019852705) internal successors, (8396), 3141 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 8396 transitions. [2023-11-24 23:59:12,281 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 8396 transitions. Word has length 20 [2023-11-24 23:59:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:12,282 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 8396 transitions. [2023-11-24 23:59:12,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 8396 transitions. [2023-11-24 23:59:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 23:59:12,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:12,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:12,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:12,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 23:59:12,491 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:12,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:12,492 INFO L85 PathProgramCache]: Analyzing trace with hash -915741005, now seen corresponding path program 1 times [2023-11-24 23:59:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:12,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209702140] [2023-11-24 23:59:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:12,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:12,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:12,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209702140] [2023-11-24 23:59:12,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209702140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:12,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:12,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:59:12,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483008654] [2023-11-24 23:59:12,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:12,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:59:12,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:12,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:59:12,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:12,597 INFO L87 Difference]: Start difference. First operand 3142 states and 8396 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:12,840 INFO L93 Difference]: Finished difference Result 3522 states and 9250 transitions. [2023-11-24 23:59:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:59:12,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 23:59:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:12,856 INFO L225 Difference]: With dead ends: 3522 [2023-11-24 23:59:12,856 INFO L226 Difference]: Without dead ends: 3522 [2023-11-24 23:59:12,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:12,857 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:12,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 80 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2023-11-24 23:59:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 3430. [2023-11-24 23:59:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3411 states have (on average 2.652008208736441) internal successors, (9046), 3429 states have internal predecessors, (9046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 9046 transitions. [2023-11-24 23:59:13,025 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 9046 transitions. Word has length 21 [2023-11-24 23:59:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:13,026 INFO L495 AbstractCegarLoop]: Abstraction has 3430 states and 9046 transitions. [2023-11-24 23:59:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 9046 transitions. [2023-11-24 23:59:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 23:59:13,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:13,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:13,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:59:13,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:13,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2005811863, now seen corresponding path program 1 times [2023-11-24 23:59:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:13,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815103476] [2023-11-24 23:59:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:13,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:59:13,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:13,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815103476] [2023-11-24 23:59:13,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815103476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:13,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:13,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:13,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981252001] [2023-11-24 23:59:13,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:13,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:13,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:13,105 INFO L87 Difference]: Start difference. First operand 3430 states and 9046 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:13,265 INFO L93 Difference]: Finished difference Result 3280 states and 8610 transitions. [2023-11-24 23:59:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 23:59:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:13,279 INFO L225 Difference]: With dead ends: 3280 [2023-11-24 23:59:13,279 INFO L226 Difference]: Without dead ends: 3280 [2023-11-24 23:59:13,280 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 [2023-11-24 23:59:13,280 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:13,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 48 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2023-11-24 23:59:13,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2082. [2023-11-24 23:59:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2068 states have (on average 2.631044487427466) internal successors, (5441), 2081 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 5441 transitions. [2023-11-24 23:59:13,376 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 5441 transitions. Word has length 21 [2023-11-24 23:59:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:13,376 INFO L495 AbstractCegarLoop]: Abstraction has 2082 states and 5441 transitions. [2023-11-24 23:59:13,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 5441 transitions. [2023-11-24 23:59:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 23:59:13,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:13,379 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:13,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:59:13,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:13,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:13,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1470912286, now seen corresponding path program 1 times [2023-11-24 23:59:13,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:13,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702929963] [2023-11-24 23:59:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:13,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:13,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:13,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702929963] [2023-11-24 23:59:13,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702929963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:13,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310663982] [2023-11-24 23:59:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:13,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:13,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:13,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:13,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:59:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:13,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:13,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:13,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:13,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310663982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:13,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:13,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-24 23:59:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649571267] [2023-11-24 23:59:13,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:13,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:59:13,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:59:13,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:13,713 INFO L87 Difference]: Start difference. First operand 2082 states and 5441 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:13,976 INFO L93 Difference]: Finished difference Result 2018 states and 5195 transitions. [2023-11-24 23:59:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:59:13,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 23:59:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:13,985 INFO L225 Difference]: With dead ends: 2018 [2023-11-24 23:59:13,985 INFO L226 Difference]: Without dead ends: 2018 [2023-11-24 23:59:13,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:59:13,986 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 95 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:13,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 99 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2023-11-24 23:59:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2018. [2023-11-24 23:59:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2007 states have (on average 2.5884404583956155) internal successors, (5195), 2017 states have internal predecessors, (5195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5195 transitions. [2023-11-24 23:59:14,083 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5195 transitions. Word has length 24 [2023-11-24 23:59:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:14,084 INFO L495 AbstractCegarLoop]: Abstraction has 2018 states and 5195 transitions. [2023-11-24 23:59:14,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5195 transitions. [2023-11-24 23:59:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 23:59:14,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:14,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 23:59:14,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:14,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 23:59:14,293 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:14,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1646359902, now seen corresponding path program 1 times [2023-11-24 23:59:14,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:14,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945432634] [2023-11-24 23:59:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:14,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:59:14,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:14,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945432634] [2023-11-24 23:59:14,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945432634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:14,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:14,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:14,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603520241] [2023-11-24 23:59:14,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:14,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:14,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:14,376 INFO L87 Difference]: Start difference. First operand 2018 states and 5195 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:14,510 INFO L93 Difference]: Finished difference Result 1954 states and 4949 transitions. [2023-11-24 23:59:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:14,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-24 23:59:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:14,518 INFO L225 Difference]: With dead ends: 1954 [2023-11-24 23:59:14,518 INFO L226 Difference]: Without dead ends: 1954 [2023-11-24 23:59:14,518 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 [2023-11-24 23:59:14,519 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:14,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 42 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2023-11-24 23:59:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1948. [2023-11-24 23:59:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1940 states have (on average 2.5463917525773194) internal successors, (4940), 1947 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 4940 transitions. [2023-11-24 23:59:14,596 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 4940 transitions. Word has length 25 [2023-11-24 23:59:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:14,596 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 4940 transitions. [2023-11-24 23:59:14,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 4940 transitions. [2023-11-24 23:59:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 23:59:14,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:14,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:14,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:59:14,601 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:14,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:14,602 INFO L85 PathProgramCache]: Analyzing trace with hash 530554981, now seen corresponding path program 1 times [2023-11-24 23:59:14,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:14,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251489426] [2023-11-24 23:59:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:14,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:14,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:14,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251489426] [2023-11-24 23:59:14,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251489426] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:14,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189259550] [2023-11-24 23:59:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:14,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:14,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:14,797 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:14,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:59:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:14,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:59:14,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:14,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:14,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189259550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:14,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:14,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-24 23:59:14,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172999740] [2023-11-24 23:59:14,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:15,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:15,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:59:15,001 INFO L87 Difference]: Start difference. First operand 1948 states and 4940 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:15,106 INFO L93 Difference]: Finished difference Result 1936 states and 4912 transitions. [2023-11-24 23:59:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:15,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2023-11-24 23:59:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:15,113 INFO L225 Difference]: With dead ends: 1936 [2023-11-24 23:59:15,114 INFO L226 Difference]: Without dead ends: 1936 [2023-11-24 23:59:15,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:59:15,115 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:15,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 20 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2023-11-24 23:59:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1754. [2023-11-24 23:59:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1748 states have (on average 2.5257437070938216) internal successors, (4415), 1753 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 4415 transitions. [2023-11-24 23:59:15,172 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 4415 transitions. Word has length 31 [2023-11-24 23:59:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:15,172 INFO L495 AbstractCegarLoop]: Abstraction has 1754 states and 4415 transitions. [2023-11-24 23:59:15,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:15,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 4415 transitions. [2023-11-24 23:59:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 23:59:15,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:15,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:15,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:15,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 23:59:15,382 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:15,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1021293426, now seen corresponding path program 1 times [2023-11-24 23:59:15,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:15,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714046789] [2023-11-24 23:59:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:15,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:15,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714046789] [2023-11-24 23:59:15,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714046789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546272637] [2023-11-24 23:59:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:15,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:15,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:15,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:15,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:59:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:15,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:59:15,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:15,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:15,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546272637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:15,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:15,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-11-24 23:59:15,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361259142] [2023-11-24 23:59:15,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:15,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:59:15,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:15,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:59:15,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:59:15,784 INFO L87 Difference]: Start difference. First operand 1754 states and 4415 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:16,186 INFO L93 Difference]: Finished difference Result 2310 states and 5797 transitions. [2023-11-24 23:59:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:59:16,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2023-11-24 23:59:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:16,194 INFO L225 Difference]: With dead ends: 2310 [2023-11-24 23:59:16,194 INFO L226 Difference]: Without dead ends: 2310 [2023-11-24 23:59:16,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:59:16,196 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:16,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 134 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:59:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2023-11-24 23:59:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1856. [2023-11-24 23:59:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1850 states have (on average 2.565945945945946) internal successors, (4747), 1855 states have internal predecessors, (4747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 4747 transitions. [2023-11-24 23:59:16,258 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 4747 transitions. Word has length 31 [2023-11-24 23:59:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:16,258 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 4747 transitions. [2023-11-24 23:59:16,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 4747 transitions. [2023-11-24 23:59:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:59:16,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:16,262 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:16,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:16,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 23:59:16,468 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:16,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash -732664267, now seen corresponding path program 1 times [2023-11-24 23:59:16,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:16,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126881825] [2023-11-24 23:59:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:16,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:16,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126881825] [2023-11-24 23:59:16,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126881825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:16,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399759728] [2023-11-24 23:59:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:16,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:16,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:16,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:16,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:59:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:16,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:59:16,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:59:16,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:16,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399759728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:16,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:16,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-11-24 23:59:16,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840663262] [2023-11-24 23:59:16,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:16,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:59:16,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:16,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:59:16,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:16,855 INFO L87 Difference]: Start difference. First operand 1856 states and 4747 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:17,102 INFO L93 Difference]: Finished difference Result 2386 states and 6045 transitions. [2023-11-24 23:59:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:59:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 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 32 [2023-11-24 23:59:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:17,111 INFO L225 Difference]: With dead ends: 2386 [2023-11-24 23:59:17,111 INFO L226 Difference]: Without dead ends: 2386 [2023-11-24 23:59:17,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:59:17,112 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:17,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 60 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2023-11-24 23:59:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2038. [2023-11-24 23:59:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2032 states have (on average 2.5688976377952755) internal successors, (5220), 2037 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5220 transitions. [2023-11-24 23:59:17,176 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5220 transitions. Word has length 32 [2023-11-24 23:59:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:17,176 INFO L495 AbstractCegarLoop]: Abstraction has 2038 states and 5220 transitions. [2023-11-24 23:59:17,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5220 transitions. [2023-11-24 23:59:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:59:17,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:17,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:17,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:17,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 23:59:17,395 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:17,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1500558296, now seen corresponding path program 1 times [2023-11-24 23:59:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:17,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244677163] [2023-11-24 23:59:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:17,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:17,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:17,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244677163] [2023-11-24 23:59:17,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244677163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:17,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384151100] [2023-11-24 23:59:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:17,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:17,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:17,574 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:17,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 23:59:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:17,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:59:17,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:17,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:17,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384151100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2058431036] [2023-11-24 23:59:17,905 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:59:17,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:17,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-11-24 23:59:17,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900599981] [2023-11-24 23:59:17,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:17,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 23:59:17,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 23:59:17,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:59:17,909 INFO L87 Difference]: Start difference. First operand 2038 states and 5220 transitions. Second operand has 14 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:18,525 INFO L93 Difference]: Finished difference Result 4196 states and 10629 transitions. [2023-11-24 23:59:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 23:59:18,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 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 32 [2023-11-24 23:59:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:18,539 INFO L225 Difference]: With dead ends: 4196 [2023-11-24 23:59:18,539 INFO L226 Difference]: Without dead ends: 4196 [2023-11-24 23:59:18,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2023-11-24 23:59:18,540 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 381 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:18,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 167 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:59:18,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2023-11-24 23:59:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3356. [2023-11-24 23:59:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3350 states have (on average 2.590746268656716) internal successors, (8679), 3355 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 8679 transitions. [2023-11-24 23:59:18,678 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 8679 transitions. Word has length 32 [2023-11-24 23:59:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:18,679 INFO L495 AbstractCegarLoop]: Abstraction has 3356 states and 8679 transitions. [2023-11-24 23:59:18,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 8679 transitions. [2023-11-24 23:59:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:59:18,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:18,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:18,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:18,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 23:59:18,888 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:18,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:18,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1595324604, now seen corresponding path program 1 times [2023-11-24 23:59:18,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:18,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967246180] [2023-11-24 23:59:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:18,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:19,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:19,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967246180] [2023-11-24 23:59:19,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967246180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:19,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762921659] [2023-11-24 23:59:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:19,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:19,072 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:19,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 23:59:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:19,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:59:19,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:19,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:19,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762921659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:19,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707281022] [2023-11-24 23:59:19,416 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:59:19,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:19,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-24 23:59:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463239586] [2023-11-24 23:59:19,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:19,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 23:59:19,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 23:59:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:59:19,420 INFO L87 Difference]: Start difference. First operand 3356 states and 8679 transitions. Second operand has 16 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:19,907 INFO L93 Difference]: Finished difference Result 5404 states and 13704 transitions. [2023-11-24 23:59:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 23:59:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 32 [2023-11-24 23:59:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:19,924 INFO L225 Difference]: With dead ends: 5404 [2023-11-24 23:59:19,924 INFO L226 Difference]: Without dead ends: 5404 [2023-11-24 23:59:19,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2023-11-24 23:59:19,926 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 302 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:19,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 106 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:59:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2023-11-24 23:59:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 3352. [2023-11-24 23:59:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3348 states have (on average 2.6248506571087216) internal successors, (8788), 3351 states have internal predecessors, (8788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 8788 transitions. [2023-11-24 23:59:20,109 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 8788 transitions. Word has length 32 [2023-11-24 23:59:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:20,109 INFO L495 AbstractCegarLoop]: Abstraction has 3352 states and 8788 transitions. [2023-11-24 23:59:20,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 8788 transitions. [2023-11-24 23:59:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:59:20,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:20,119 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-24 23:59:20,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:20,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 23:59:20,325 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:20,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:20,325 INFO L85 PathProgramCache]: Analyzing trace with hash 155585348, now seen corresponding path program 2 times [2023-11-24 23:59:20,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:20,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387654813] [2023-11-24 23:59:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:20,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:20,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:20,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387654813] [2023-11-24 23:59:20,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387654813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:20,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951580787] [2023-11-24 23:59:20,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:59:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:20,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:20,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 23:59:20,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-24 23:59:20,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:20,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 23:59:20,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:20,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:21,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951580787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:21,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [767698656] [2023-11-24 23:59:21,185 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:59:21,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:21,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-24 23:59:21,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879104549] [2023-11-24 23:59:21,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:21,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 23:59:21,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 23:59:21,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:59:21,192 INFO L87 Difference]: Start difference. First operand 3352 states and 8788 transitions. Second operand has 24 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:22,013 INFO L93 Difference]: Finished difference Result 5814 states and 14808 transitions. [2023-11-24 23:59:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 23:59:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-24 23:59:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:22,032 INFO L225 Difference]: With dead ends: 5814 [2023-11-24 23:59:22,033 INFO L226 Difference]: Without dead ends: 5814 [2023-11-24 23:59:22,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 23:59:22,034 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 599 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:22,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 191 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:59:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5814 states. [2023-11-24 23:59:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5814 to 4628. [2023-11-24 23:59:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4624 states have (on average 2.6148356401384083) internal successors, (12091), 4627 states have internal predecessors, (12091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 12091 transitions. [2023-11-24 23:59:22,165 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 12091 transitions. Word has length 53 [2023-11-24 23:59:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:22,165 INFO L495 AbstractCegarLoop]: Abstraction has 4628 states and 12091 transitions. [2023-11-24 23:59:22,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 12091 transitions. [2023-11-24 23:59:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:59:22,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:22,173 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:22,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:22,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:22,379 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:22,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1567233579, now seen corresponding path program 2 times [2023-11-24 23:59:22,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:22,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229423215] [2023-11-24 23:59:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:22,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:59:22,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229423215] [2023-11-24 23:59:22,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229423215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:22,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143628434] [2023-11-24 23:59:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:59:22,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:22,681 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:22,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 23:59:22,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 23:59:22,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:22,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 23:59:22,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:59:23,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:59:23,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143628434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:23,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128718826] [2023-11-24 23:59:23,175 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:59:23,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:23,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2023-11-24 23:59:23,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812339676] [2023-11-24 23:59:23,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:23,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 23:59:23,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 23:59:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-24 23:59:23,180 INFO L87 Difference]: Start difference. First operand 4628 states and 12091 transitions. Second operand has 18 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:23,938 INFO L93 Difference]: Finished difference Result 10218 states and 26343 transitions. [2023-11-24 23:59:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-24 23:59:23,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 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 54 [2023-11-24 23:59:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:23,975 INFO L225 Difference]: With dead ends: 10218 [2023-11-24 23:59:23,975 INFO L226 Difference]: Without dead ends: 10218 [2023-11-24 23:59:23,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 23:59:23,976 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 469 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:23,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 144 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:59:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10218 states. [2023-11-24 23:59:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10218 to 8134. [2023-11-24 23:59:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8134 states, 8130 states have (on average 2.678720787207872) internal successors, (21778), 8133 states have internal predecessors, (21778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8134 states to 8134 states and 21778 transitions. [2023-11-24 23:59:24,332 INFO L78 Accepts]: Start accepts. Automaton has 8134 states and 21778 transitions. Word has length 54 [2023-11-24 23:59:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:24,333 INFO L495 AbstractCegarLoop]: Abstraction has 8134 states and 21778 transitions. [2023-11-24 23:59:24,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 8134 states and 21778 transitions. [2023-11-24 23:59:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 23:59:24,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:24,350 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:24,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:24,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:24,557 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:24,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash -623172125, now seen corresponding path program 2 times [2023-11-24 23:59:24,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:24,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792623944] [2023-11-24 23:59:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:24,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:24,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792623944] [2023-11-24 23:59:24,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792623944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:24,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114130943] [2023-11-24 23:59:24,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:59:24,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:24,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:25,002 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:25,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 23:59:25,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-24 23:59:25,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:25,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 23:59:25,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:25,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:25,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114130943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314560177] [2023-11-24 23:59:25,696 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:59:25,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:25,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-11-24 23:59:25,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83522784] [2023-11-24 23:59:25,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:25,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 23:59:25,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:25,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 23:59:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-24 23:59:25,701 INFO L87 Difference]: Start difference. First operand 8134 states and 21778 transitions. Second operand has 26 states, 25 states have (on average 5.8) internal successors, (145), 25 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:27,171 INFO L93 Difference]: Finished difference Result 15450 states and 40580 transitions. [2023-11-24 23:59:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-24 23:59:27,172 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.8) internal successors, (145), 25 states have internal predecessors, (145), 0 states have call successors, (0), 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 68 [2023-11-24 23:59:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:27,226 INFO L225 Difference]: With dead ends: 15450 [2023-11-24 23:59:27,226 INFO L226 Difference]: Without dead ends: 15450 [2023-11-24 23:59:27,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=2077, Unknown=0, NotChecked=0, Total=2652 [2023-11-24 23:59:27,228 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 598 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:27,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 306 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:59:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15450 states. [2023-11-24 23:59:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15450 to 11302. [2023-11-24 23:59:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11302 states, 11298 states have (on average 2.698707735882457) internal successors, (30490), 11301 states have internal predecessors, (30490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11302 states to 11302 states and 30490 transitions. [2023-11-24 23:59:27,702 INFO L78 Accepts]: Start accepts. Automaton has 11302 states and 30490 transitions. Word has length 68 [2023-11-24 23:59:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:27,702 INFO L495 AbstractCegarLoop]: Abstraction has 11302 states and 30490 transitions. [2023-11-24 23:59:27,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.8) internal successors, (145), 25 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 11302 states and 30490 transitions. [2023-11-24 23:59:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-24 23:59:27,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:27,726 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:27,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:27,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:27,933 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:27,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:27,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1235316547, now seen corresponding path program 3 times [2023-11-24 23:59:27,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:27,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955889496] [2023-11-24 23:59:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:27,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:59:28,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:28,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955889496] [2023-11-24 23:59:28,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955889496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:28,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964248954] [2023-11-24 23:59:28,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 23:59:28,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:28,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:28,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:28,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 23:59:28,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 23:59:28,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:28,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 23:59:28,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:29,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:29,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964248954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:29,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:29,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 24 [2023-11-24 23:59:29,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440845526] [2023-11-24 23:59:29,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:29,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 23:59:29,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:29,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 23:59:29,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:59:29,019 INFO L87 Difference]: Start difference. First operand 11302 states and 30490 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:29,962 INFO L93 Difference]: Finished difference Result 26136 states and 71378 transitions. [2023-11-24 23:59:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 23:59:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-11-24 23:59:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:30,125 INFO L225 Difference]: With dead ends: 26136 [2023-11-24 23:59:30,125 INFO L226 Difference]: Without dead ends: 25528 [2023-11-24 23:59:30,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2023-11-24 23:59:30,127 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 236 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:30,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 325 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:59:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25528 states. [2023-11-24 23:59:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25528 to 15940. [2023-11-24 23:59:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15940 states, 15936 states have (on average 2.674949799196787) internal successors, (42628), 15939 states have internal predecessors, (42628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15940 states to 15940 states and 42628 transitions. [2023-11-24 23:59:30,724 INFO L78 Accepts]: Start accepts. Automaton has 15940 states and 42628 transitions. Word has length 76 [2023-11-24 23:59:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:30,724 INFO L495 AbstractCegarLoop]: Abstraction has 15940 states and 42628 transitions. [2023-11-24 23:59:30,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 15940 states and 42628 transitions. [2023-11-24 23:59:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-24 23:59:30,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:30,743 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:30,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:30,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:30,949 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:30,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash 546564429, now seen corresponding path program 1 times [2023-11-24 23:59:30,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:30,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753553315] [2023-11-24 23:59:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:30,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 23:59:31,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:31,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753553315] [2023-11-24 23:59:31,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753553315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:31,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234105064] [2023-11-24 23:59:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:31,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:31,534 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:31,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 23:59:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:31,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 23:59:31,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 23:59:31,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 23:59:32,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234105064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:32,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109768743] [2023-11-24 23:59:32,151 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:59:32,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:32,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-24 23:59:32,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473304255] [2023-11-24 23:59:32,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:32,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 23:59:32,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:32,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 23:59:32,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-11-24 23:59:32,156 INFO L87 Difference]: Start difference. First operand 15940 states and 42628 transitions. Second operand has 22 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 21 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:33,017 INFO L93 Difference]: Finished difference Result 23202 states and 60944 transitions. [2023-11-24 23:59:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 23:59:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 21 states have internal predecessors, (125), 0 states have call successors, (0), 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 77 [2023-11-24 23:59:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:33,077 INFO L225 Difference]: With dead ends: 23202 [2023-11-24 23:59:33,077 INFO L226 Difference]: Without dead ends: 23166 [2023-11-24 23:59:33,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=970, Unknown=0, NotChecked=0, Total=1260 [2023-11-24 23:59:33,079 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 356 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:33,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 142 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:59:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23166 states. [2023-11-24 23:59:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23166 to 10620. [2023-11-24 23:59:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10620 states, 10618 states have (on average 2.6415520813712563) internal successors, (28048), 10619 states have internal predecessors, (28048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10620 states to 10620 states and 28048 transitions. [2023-11-24 23:59:33,576 INFO L78 Accepts]: Start accepts. Automaton has 10620 states and 28048 transitions. Word has length 77 [2023-11-24 23:59:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:33,576 INFO L495 AbstractCegarLoop]: Abstraction has 10620 states and 28048 transitions. [2023-11-24 23:59:33,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 21 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 10620 states and 28048 transitions. [2023-11-24 23:59:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-24 23:59:33,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:33,598 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:33,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:33,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-24 23:59:33,806 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:33,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash -292984289, now seen corresponding path program 1 times [2023-11-24 23:59:33,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:33,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915657237] [2023-11-24 23:59:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:33,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 23:59:34,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:34,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915657237] [2023-11-24 23:59:34,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915657237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:34,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276784731] [2023-11-24 23:59:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:34,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:34,297 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:34,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 23:59:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:34,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 23:59:34,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-24 23:59:34,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-24 23:59:35,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276784731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:35,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888728831] [2023-11-24 23:59:35,091 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:59:35,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:35,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2023-11-24 23:59:35,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595800864] [2023-11-24 23:59:35,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 23:59:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 23:59:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:59:35,096 INFO L87 Difference]: Start difference. First operand 10620 states and 28048 transitions. Second operand has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:36,070 INFO L93 Difference]: Finished difference Result 26080 states and 68262 transitions. [2023-11-24 23:59:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-24 23:59:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 0 states have call successors, (0), 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 90 [2023-11-24 23:59:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:36,140 INFO L225 Difference]: With dead ends: 26080 [2023-11-24 23:59:36,140 INFO L226 Difference]: Without dead ends: 26080 [2023-11-24 23:59:36,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=1285, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 23:59:36,142 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 449 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:36,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 182 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:59:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26080 states. [2023-11-24 23:59:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26080 to 18500. [2023-11-24 23:59:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18500 states, 18498 states have (on average 2.6548816088225755) internal successors, (49110), 18499 states have internal predecessors, (49110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18500 states to 18500 states and 49110 transitions. [2023-11-24 23:59:36,868 INFO L78 Accepts]: Start accepts. Automaton has 18500 states and 49110 transitions. Word has length 90 [2023-11-24 23:59:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:36,869 INFO L495 AbstractCegarLoop]: Abstraction has 18500 states and 49110 transitions. [2023-11-24 23:59:36,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18500 states and 49110 transitions. [2023-11-24 23:59:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-24 23:59:36,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:36,993 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:37,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-24 23:59:37,200 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:37,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -68128567, now seen corresponding path program 2 times [2023-11-24 23:59:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:37,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203085552] [2023-11-24 23:59:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:59:37,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:37,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203085552] [2023-11-24 23:59:37,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203085552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:37,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501398389] [2023-11-24 23:59:37,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:59:37,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:37,935 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:37,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-24 23:59:38,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-24 23:59:38,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:38,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 23:59:38,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 23:59:38,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 23:59:39,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501398389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:39,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [80377522] [2023-11-24 23:59:39,277 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:59:39,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:39,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 34 [2023-11-24 23:59:39,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981223352] [2023-11-24 23:59:39,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:39,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-24 23:59:39,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:39,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-24 23:59:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2023-11-24 23:59:39,282 INFO L87 Difference]: Start difference. First operand 18500 states and 49110 transitions. Second operand has 36 states, 35 states have (on average 6.085714285714285) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:40,939 INFO L93 Difference]: Finished difference Result 40172 states and 105214 transitions. [2023-11-24 23:59:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-24 23:59:40,940 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 6.085714285714285) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-11-24 23:59:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:41,045 INFO L225 Difference]: With dead ends: 40172 [2023-11-24 23:59:41,045 INFO L226 Difference]: Without dead ends: 40172 [2023-11-24 23:59:41,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=817, Invalid=2843, Unknown=0, NotChecked=0, Total=3660 [2023-11-24 23:59:41,048 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 870 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:41,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 319 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:59:41,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40172 states. [2023-11-24 23:59:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40172 to 19496. [2023-11-24 23:59:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19496 states, 19494 states have (on average 2.6530214424951266) internal successors, (51718), 19495 states have internal predecessors, (51718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19496 states to 19496 states and 51718 transitions. [2023-11-24 23:59:41,785 INFO L78 Accepts]: Start accepts. Automaton has 19496 states and 51718 transitions. Word has length 115 [2023-11-24 23:59:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:41,786 INFO L495 AbstractCegarLoop]: Abstraction has 19496 states and 51718 transitions. [2023-11-24 23:59:41,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 6.085714285714285) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 19496 states and 51718 transitions. [2023-11-24 23:59:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-24 23:59:41,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:41,824 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:41,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:42,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-24 23:59:42,038 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-24 23:59:42,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1681139439, now seen corresponding path program 3 times [2023-11-24 23:59:42,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:42,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240486808] [2023-11-24 23:59:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:42,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 387 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-24 23:59:43,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:43,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240486808] [2023-11-24 23:59:43,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240486808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:43,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382314154] [2023-11-24 23:59:43,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 23:59:43,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:43,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:43,147 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:43,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-24 23:59:43,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 23:59:43,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:43,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 23:59:43,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-24 23:59:43,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:43,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382314154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:43,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:43,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 31 [2023-11-24 23:59:43,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584756672] [2023-11-24 23:59:43,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:43,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 23:59:43,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:43,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 23:59:43,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2023-11-24 23:59:43,797 INFO L87 Difference]: Start difference. First operand 19496 states and 51718 transitions. Second operand has 13 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:44,631 INFO L93 Difference]: Finished difference Result 25942 states and 66328 transitions. [2023-11-24 23:59:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 23:59:44,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 0 states have call successors, (0), 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 138 [2023-11-24 23:59:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:44,632 INFO L225 Difference]: With dead ends: 25942 [2023-11-24 23:59:44,632 INFO L226 Difference]: Without dead ends: 0 [2023-11-24 23:59:44,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2023-11-24 23:59:44,633 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 191 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:44,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 264 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:59:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-24 23:59:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-24 23:59:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-24 23:59:44,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2023-11-24 23:59:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:44,635 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-24 23:59:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-24 23:59:44,636 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-24 23:59:44,639 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2023-11-24 23:59:44,639 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 18 remaining) [2023-11-24 23:59:44,639 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2023-11-24 23:59:44,640 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2023-11-24 23:59:44,640 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2023-11-24 23:59:44,640 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2023-11-24 23:59:44,640 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2023-11-24 23:59:44,640 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2023-11-24 23:59:44,640 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 18 remaining) [2023-11-24 23:59:44,640 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 18 remaining) [2023-11-24 23:59:44,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 18 remaining) [2023-11-24 23:59:44,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 18 remaining) [2023-11-24 23:59:44,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2023-11-24 23:59:44,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 18 remaining) [2023-11-24 23:59:44,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2023-11-24 23:59:44,642 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2023-11-24 23:59:44,642 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2023-11-24 23:59:44,642 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2023-11-24 23:59:44,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-24 23:59:44,846 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:44,850 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-24 23:59:44,850 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 23:59:44,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 11:59:44 BasicIcfg [2023-11-24 23:59:44,854 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 23:59:44,854 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 23:59:44,854 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 23:59:44,855 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 23:59:44,855 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:05" (3/4) ... [2023-11-24 23:59:44,857 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-24 23:59:44,860 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2023-11-24 23:59:44,861 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2023-11-24 23:59:44,865 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 46 nodes and edges [2023-11-24 23:59:44,865 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-11-24 23:59:44,866 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-24 23:59:44,866 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-24 23:59:44,957 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/witness.graphml [2023-11-24 23:59:44,957 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/witness.yml [2023-11-24 23:59:44,958 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 23:59:44,959 INFO L158 Benchmark]: Toolchain (without parser) took 41419.58ms. Allocated memory was 132.1MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 93.3MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 466.7MB. Max. memory is 16.1GB. [2023-11-24 23:59:44,959 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 132.1MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:59:44,959 INFO L158 Benchmark]: CACSL2BoogieTranslator took 774.74ms. Allocated memory is still 132.1MB. Free memory was 93.3MB in the beginning and 63.1MB in the end (delta: 30.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2023-11-24 23:59:44,960 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.92ms. Allocated memory is still 132.1MB. Free memory was 63.1MB in the beginning and 60.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:59:44,960 INFO L158 Benchmark]: Boogie Preprocessor took 68.98ms. Allocated memory was 132.1MB in the beginning and 180.4MB in the end (delta: 48.2MB). Free memory was 60.6MB in the beginning and 148.8MB in the end (delta: -88.2MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2023-11-24 23:59:44,966 INFO L158 Benchmark]: RCFGBuilder took 1258.26ms. Allocated memory is still 180.4MB. Free memory was 148.8MB in the beginning and 107.5MB in the end (delta: 41.3MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. [2023-11-24 23:59:44,968 INFO L158 Benchmark]: TraceAbstraction took 39145.48ms. Allocated memory was 180.4MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 106.5MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 425.9MB. Max. memory is 16.1GB. [2023-11-24 23:59:44,969 INFO L158 Benchmark]: Witness Printer took 103.56ms. Allocated memory is still 3.2GB. Free memory was 2.7GB in the beginning and 2.7GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-24 23:59:44,972 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 132.1MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 774.74ms. Allocated memory is still 132.1MB. Free memory was 93.3MB in the beginning and 63.1MB in the end (delta: 30.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.92ms. Allocated memory is still 132.1MB. Free memory was 63.1MB in the beginning and 60.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.98ms. Allocated memory was 132.1MB in the beginning and 180.4MB in the end (delta: 48.2MB). Free memory was 60.6MB in the beginning and 148.8MB in the end (delta: -88.2MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * RCFGBuilder took 1258.26ms. Allocated memory is still 180.4MB. Free memory was 148.8MB in the beginning and 107.5MB in the end (delta: 41.3MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. * TraceAbstraction took 39145.48ms. Allocated memory was 180.4MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 106.5MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 425.9MB. Max. memory is 16.1GB. * Witness Printer took 103.56ms. Allocated memory is still 3.2GB. Free memory was 2.7GB in the beginning and 2.7GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 946]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 946]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 992]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 992]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 950]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 1007]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 950]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 1007]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 82 locations, 18 error locations. Started 1 CEGAR loops. OverallTime: 39.0s, OverallIterations: 26, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.3s, AutomataDifference: 14.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5735 SdHoareTripleChecker+Valid, 9.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5735 mSDsluCounter, 3454 SdHoareTripleChecker+Invalid, 7.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2830 mSDsCounter, 137 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11100 IncrementalHoareTripleChecker+Invalid, 11237 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 137 mSolverCounterUnsat, 624 mSDtfsCounter, 11100 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1802 GetRequests, 1343 SyntacticMatches, 2 SemanticMatches, 457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3131 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19496occurred in iteration=25, InterpolantAutomatonStates: 347, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.3s AutomataMinimizationTime, 26 MinimizatonAttempts, 64526 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 10.4s InterpolantComputationTime, 1973 NumberOfCodeBlocks, 1973 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 2462 ConstructedInterpolants, 0 QuantifiedInterpolants, 8532 SizeOfPredicates, 73 NumberOfNonLiveVariables, 6413 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 52 InterpolantComputations, 17 PerfectInterpolantSequences, 829/3546 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-24 23:59:44,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff235e1c-3438-412c-9073-f9038bd5a8ea/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE