./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/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_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/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_ca9fa402-76e0-4ec0-8e29-65bf265205c6/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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:59:02,156 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:59:02,248 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-24 23:59:02,254 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:59:02,255 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:59:02,285 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:59:02,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:59:02,287 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:59:02,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:59:02,289 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:59:02,290 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:59:02,290 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:59:02,291 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:59:02,292 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:59:02,292 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:59:02,293 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:59:02,293 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:59:02,294 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:59:02,295 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:59:02,295 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:59:02,296 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:59:02,297 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:59:02,298 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:59:02,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:59:02,299 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:59:02,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:59:02,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:59:02,301 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:59:02,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:59:02,302 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:59:02,303 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:59:02,304 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:59:02,304 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:59:02,304 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:59:02,305 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:59:02,305 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:59:02,305 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:59:02,306 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:59:02,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:59:02,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:59:02,307 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:59:02,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:59:02,308 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:59:02,308 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:59:02,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:59:02,310 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:59:02,310 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:59:02,310 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:59:02,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:59:02,311 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_ca9fa402-76e0-4ec0-8e29-65bf265205c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2023-11-24 23:59:02,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:59:02,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:59:02,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:59:02,682 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:59:02,683 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:59:02,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-24 23:59:05,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:59:06,055 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:59:06,055 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-24 23:59:06,068 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/data/2bbdc29dc/464952e94cb948e18eef666fb54ba77f/FLAG2bd7e1f49 [2023-11-24 23:59:06,088 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/data/2bbdc29dc/464952e94cb948e18eef666fb54ba77f [2023-11-24 23:59:06,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:59:06,101 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:59:06,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:59:06,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:59:06,113 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:59:06,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5a9f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06, skipping insertion in model container [2023-11-24 23:59:06,116 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,150 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:59:06,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:59:06,431 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:59:06,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:59:06,495 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:59:06,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06 WrapperNode [2023-11-24 23:59:06,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:59:06,501 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:59:06,501 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:59:06,501 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:59:06,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,566 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 141 [2023-11-24 23:59:06,567 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:59:06,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:59:06,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:59:06,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:59:06,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,592 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,604 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,612 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,614 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,618 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:59:06,619 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:59:06,619 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:59:06,620 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:59:06,621 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (1/1) ... [2023-11-24 23:59:06,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:59:06,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:06,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:59:06,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:59:06,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:59:06,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 23:59:06,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 23:59:06,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 23:59:06,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 23:59:06,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:59:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:59:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:59:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:59:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:59:06,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:59:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:59:06,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:59:06,714 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 23:59:06,866 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:59:06,869 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:59:07,404 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:59:07,810 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:59:07,810 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 23:59:07,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:07 BoogieIcfgContainer [2023-11-24 23:59:07,811 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:59:07,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:59:07,814 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:59:07,818 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:59:07,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:59:06" (1/3) ... [2023-11-24 23:59:07,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ad4053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:59:07, skipping insertion in model container [2023-11-24 23:59:07,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:06" (2/3) ... [2023-11-24 23:59:07,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ad4053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:59:07, skipping insertion in model container [2023-11-24 23:59:07,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:07" (3/3) ... [2023-11-24 23:59:07,821 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-11-24 23:59:07,831 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 23:59:07,843 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:59:07,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-24 23:59:07,843 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 23:59:07,902 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 23:59:07,933 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 61 transitions, 136 flow [2023-11-24 23:59:08,014 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 576 states, 548 states have (on average 2.8795620437956204) internal successors, (1578), 575 states have internal predecessors, (1578), 0 states have call successors, (0), 0 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 23:59:08,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:59:08,043 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;@36c65677, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:59:08,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-24 23:59:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 576 states, 548 states have (on average 2.8795620437956204) internal successors, (1578), 575 states have internal predecessors, (1578), 0 states have call successors, (0), 0 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 23:59:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 23:59:08,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:08,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 23:59:08,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:08,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:08,062 INFO L85 PathProgramCache]: Analyzing trace with hash 602438, now seen corresponding path program 1 times [2023-11-24 23:59:08,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:08,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403656476] [2023-11-24 23:59:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:08,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:08,330 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 23:59:08,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:08,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403656476] [2023-11-24 23:59:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403656476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:08,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:08,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:59:08,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005470066] [2023-11-24 23:59:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:08,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:08,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:08,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:08,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:08,385 INFO L87 Difference]: Start difference. First operand has 576 states, 548 states have (on average 2.8795620437956204) internal successors, (1578), 575 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:08,558 INFO L93 Difference]: Finished difference Result 574 states and 1576 transitions. [2023-11-24 23:59:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:08,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 23:59:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:08,583 INFO L225 Difference]: With dead ends: 574 [2023-11-24 23:59:08,584 INFO L226 Difference]: Without dead ends: 574 [2023-11-24 23:59:08,586 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 23:59:08,591 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:08,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 54 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-11-24 23:59:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2023-11-24 23:59:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 548 states have (on average 2.875912408759124) internal successors, (1576), 573 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 23:59:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1576 transitions. [2023-11-24 23:59:08,714 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1576 transitions. Word has length 3 [2023-11-24 23:59:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:08,715 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 1576 transitions. [2023-11-24 23:59:08,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1576 transitions. [2023-11-24 23:59:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 23:59:08,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:08,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 23:59:08,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:59:08,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:08,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash 18676179, now seen corresponding path program 1 times [2023-11-24 23:59:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:08,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974295839] [2023-11-24 23:59:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:08,845 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 23:59:08,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:08,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974295839] [2023-11-24 23:59:08,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974295839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:08,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:08,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:59:08,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677483109] [2023-11-24 23:59:08,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:08,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:08,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:08,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:08,850 INFO L87 Difference]: Start difference. First operand 574 states and 1576 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:08,969 INFO L93 Difference]: Finished difference Result 580 states and 1584 transitions. [2023-11-24 23:59:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:08,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 23:59:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:08,977 INFO L225 Difference]: With dead ends: 580 [2023-11-24 23:59:08,977 INFO L226 Difference]: Without dead ends: 580 [2023-11-24 23:59:08,978 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 23:59:08,980 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:08,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 60 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-11-24 23:59:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2023-11-24 23:59:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 554 states have (on average 2.8592057761732854) internal successors, (1584), 579 states have internal predecessors, (1584), 0 states have call successors, (0), 0 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 23:59:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1584 transitions. [2023-11-24 23:59:09,021 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1584 transitions. Word has length 4 [2023-11-24 23:59:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:09,021 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 1584 transitions. [2023-11-24 23:59:09,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1584 transitions. [2023-11-24 23:59:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 23:59:09,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:09,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-24 23:59:09,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:59:09,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:09,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:09,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1963077058, now seen corresponding path program 1 times [2023-11-24 23:59:09,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:09,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847867182] [2023-11-24 23:59:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:09,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:09,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:09,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847867182] [2023-11-24 23:59:09,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847867182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:09,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533974884] [2023-11-24 23:59:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:09,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:09,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:09,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:59:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:09,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:09,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:09,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:09,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533974884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:09,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449058796] [2023-11-24 23:59:09,516 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) 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 23:59:09,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:09,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-24 23:59:09,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839101365] [2023-11-24 23:59:09,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:09,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:59:09,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:09,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:59:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:59:09,528 INFO L87 Difference]: Start difference. First operand 580 states and 1584 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 23:59:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:09,814 INFO L93 Difference]: Finished difference Result 598 states and 1608 transitions. [2023-11-24 23:59:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:59:09,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 7 [2023-11-24 23:59:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:09,821 INFO L225 Difference]: With dead ends: 598 [2023-11-24 23:59:09,822 INFO L226 Difference]: Without dead ends: 598 [2023-11-24 23:59:09,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 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 23:59:09,826 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 37 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:09,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 96 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2023-11-24 23:59:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2023-11-24 23:59:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 572 states have (on average 2.8111888111888113) internal successors, (1608), 597 states have internal predecessors, (1608), 0 states have call successors, (0), 0 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 23:59:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1608 transitions. [2023-11-24 23:59:09,854 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1608 transitions. Word has length 7 [2023-11-24 23:59:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:09,855 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 1608 transitions. [2023-11-24 23:59:09,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 23:59:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1608 transitions. [2023-11-24 23:59:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:59:09,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:09,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:09,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:10,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:10,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:10,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:10,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1329999336, now seen corresponding path program 1 times [2023-11-24 23:59:10,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:10,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135915836] [2023-11-24 23:59:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:10,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:10,209 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 23:59:10,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:10,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135915836] [2023-11-24 23:59:10,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135915836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:10,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:10,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:10,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587801187] [2023-11-24 23:59:10,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:10,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:10,213 INFO L87 Difference]: Start difference. First operand 598 states and 1608 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:10,369 INFO L93 Difference]: Finished difference Result 768 states and 2126 transitions. [2023-11-24 23:59:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:10,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 23:59:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:10,379 INFO L225 Difference]: With dead ends: 768 [2023-11-24 23:59:10,379 INFO L226 Difference]: Without dead ends: 768 [2023-11-24 23:59:10,379 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 23:59:10,387 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:10,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 88 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-11-24 23:59:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 734. [2023-11-24 23:59:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 708 states have (on average 2.8757062146892656) internal successors, (2036), 733 states have internal predecessors, (2036), 0 states have call successors, (0), 0 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 23:59:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2036 transitions. [2023-11-24 23:59:10,428 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2036 transitions. Word has length 9 [2023-11-24 23:59:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:10,429 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 2036 transitions. [2023-11-24 23:59:10,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2036 transitions. [2023-11-24 23:59:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:59:10,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:10,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:10,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:59:10,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:10,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1719661147, now seen corresponding path program 1 times [2023-11-24 23:59:10,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:10,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535840945] [2023-11-24 23:59:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:10,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:10,631 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 23:59:10,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:10,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535840945] [2023-11-24 23:59:10,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535840945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:10,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:10,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:10,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315964202] [2023-11-24 23:59:10,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:10,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:59:10,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:59:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:10,636 INFO L87 Difference]: Start difference. First operand 734 states and 2036 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:10,846 INFO L93 Difference]: Finished difference Result 1291 states and 3705 transitions. [2023-11-24 23:59:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:10,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 23:59:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:10,860 INFO L225 Difference]: With dead ends: 1291 [2023-11-24 23:59:10,860 INFO L226 Difference]: Without dead ends: 1285 [2023-11-24 23:59:10,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:10,863 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:10,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 64 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2023-11-24 23:59:10,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1249. [2023-11-24 23:59:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1223 states have (on average 2.9803761242845463) internal successors, (3645), 1248 states have internal predecessors, (3645), 0 states have call successors, (0), 0 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 23:59:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3645 transitions. [2023-11-24 23:59:10,929 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3645 transitions. Word has length 10 [2023-11-24 23:59:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:10,934 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 3645 transitions. [2023-11-24 23:59:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3645 transitions. [2023-11-24 23:59:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 23:59:10,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:10,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:10,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:59:10,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:10,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:10,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1584814797, now seen corresponding path program 1 times [2023-11-24 23:59:10,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:10,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077118069] [2023-11-24 23:59:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:11,051 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 23:59:11,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:11,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077118069] [2023-11-24 23:59:11,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077118069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:11,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:11,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:11,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265553507] [2023-11-24 23:59:11,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:11,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:11,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:11,054 INFO L87 Difference]: Start difference. First operand 1249 states and 3645 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:11,209 INFO L93 Difference]: Finished difference Result 1649 states and 4905 transitions. [2023-11-24 23:59:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:11,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-24 23:59:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:11,226 INFO L225 Difference]: With dead ends: 1649 [2023-11-24 23:59:11,226 INFO L226 Difference]: Without dead ends: 1649 [2023-11-24 23:59:11,227 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 23:59:11,228 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:11,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 88 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2023-11-24 23:59:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1569. [2023-11-24 23:59:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1543 states have (on average 3.036292935839274) internal successors, (4685), 1568 states have internal predecessors, (4685), 0 states have call successors, (0), 0 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 23:59:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 4685 transitions. [2023-11-24 23:59:11,329 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 4685 transitions. Word has length 11 [2023-11-24 23:59:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:11,330 INFO L495 AbstractCegarLoop]: Abstraction has 1569 states and 4685 transitions. [2023-11-24 23:59:11,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 4685 transitions. [2023-11-24 23:59:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 23:59:11,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:11,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:11,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:59:11,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:11,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:11,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1769887350, now seen corresponding path program 1 times [2023-11-24 23:59:11,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:11,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824527813] [2023-11-24 23:59:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:11,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:11,471 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 23:59:11,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:11,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824527813] [2023-11-24 23:59:11,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824527813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:11,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:11,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:59:11,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154062014] [2023-11-24 23:59:11,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:11,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:11,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:11,474 INFO L87 Difference]: Start difference. First operand 1569 states and 4685 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) 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 23:59:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:11,651 INFO L93 Difference]: Finished difference Result 2957 states and 8918 transitions. [2023-11-24 23:59:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:11,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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 23:59:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:11,684 INFO L225 Difference]: With dead ends: 2957 [2023-11-24 23:59:11,684 INFO L226 Difference]: Without dead ends: 2891 [2023-11-24 23:59:11,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:11,686 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:11,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2023-11-24 23:59:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2848. [2023-11-24 23:59:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2824 states have (on average 3.0410764872521248) internal successors, (8588), 2847 states have internal predecessors, (8588), 0 states have call successors, (0), 0 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 23:59:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 8588 transitions. [2023-11-24 23:59:11,820 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 8588 transitions. Word has length 11 [2023-11-24 23:59:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:11,821 INFO L495 AbstractCegarLoop]: Abstraction has 2848 states and 8588 transitions. [2023-11-24 23:59:11,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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 23:59:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 8588 transitions. [2023-11-24 23:59:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:59:11,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:11,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:11,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:59:11,824 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:11,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:11,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1085721822, now seen corresponding path program 1 times [2023-11-24 23:59:11,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:11,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013774234] [2023-11-24 23:59:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:11,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:12,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013774234] [2023-11-24 23:59:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013774234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813249712] [2023-11-24 23:59:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:12,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:12,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:12,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:12,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:59:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:12,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:12,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:59:12,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:12,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813249712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:12,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:12,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-24 23:59:12,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362139472] [2023-11-24 23:59:12,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:12,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:12,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:12,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:12,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:12,299 INFO L87 Difference]: Start difference. First operand 2848 states and 8588 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 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 23:59:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:12,382 INFO L93 Difference]: Finished difference Result 2770 states and 8309 transitions. [2023-11-24 23:59:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 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 23:59:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:12,409 INFO L225 Difference]: With dead ends: 2770 [2023-11-24 23:59:12,409 INFO L226 Difference]: Without dead ends: 2702 [2023-11-24 23:59:12,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:12,410 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:12,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 16 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2023-11-24 23:59:12,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 1434. [2023-11-24 23:59:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1417 states have (on average 2.9195483415666903) internal successors, (4137), 1433 states have internal predecessors, (4137), 0 states have call successors, (0), 0 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 23:59:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 4137 transitions. [2023-11-24 23:59:12,488 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 4137 transitions. Word has length 13 [2023-11-24 23:59:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:12,488 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 4137 transitions. [2023-11-24 23:59:12,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 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 23:59:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 4137 transitions. [2023-11-24 23:59:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:59:12,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:12,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:12,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:12,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:12,696 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:12,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1000432094, now seen corresponding path program 1 times [2023-11-24 23:59:12,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:12,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094352892] [2023-11-24 23:59:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:12,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:59:12,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:12,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094352892] [2023-11-24 23:59:12,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094352892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:12,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:12,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:59:12,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416356421] [2023-11-24 23:59:12,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:12,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:59:12,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:59:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:12,831 INFO L87 Difference]: Start difference. First operand 1434 states and 4137 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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 23:59:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:13,024 INFO L93 Difference]: Finished difference Result 1125 states and 3115 transitions. [2023-11-24 23:59:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:13,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 13 [2023-11-24 23:59:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:13,035 INFO L225 Difference]: With dead ends: 1125 [2023-11-24 23:59:13,036 INFO L226 Difference]: Without dead ends: 1089 [2023-11-24 23:59:13,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:13,039 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:13,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 72 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2023-11-24 23:59:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1076. [2023-11-24 23:59:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1059 states have (on average 2.8281397544853637) internal successors, (2995), 1075 states have internal predecessors, (2995), 0 states have call successors, (0), 0 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 23:59:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 2995 transitions. [2023-11-24 23:59:13,084 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 2995 transitions. Word has length 13 [2023-11-24 23:59:13,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:13,085 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 2995 transitions. [2023-11-24 23:59:13,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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 23:59:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 2995 transitions. [2023-11-24 23:59:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 23:59:13,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:13,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:13,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:59:13,087 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:13,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1717857601, now seen corresponding path program 1 times [2023-11-24 23:59:13,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:13,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210953085] [2023-11-24 23:59:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:13,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:13,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210953085] [2023-11-24 23:59:13,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210953085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:13,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619224760] [2023-11-24 23:59:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:13,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:13,246 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:13,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:59:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:13,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:13,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:59:13,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:13,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619224760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:13,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:13,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-11-24 23:59:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172924786] [2023-11-24 23:59:13,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:13,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:13,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:13,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:13,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:13,437 INFO L87 Difference]: Start difference. First operand 1076 states and 2995 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:13,502 INFO L93 Difference]: Finished difference Result 998 states and 2782 transitions. [2023-11-24 23:59:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:13,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-24 23:59:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:13,511 INFO L225 Difference]: With dead ends: 998 [2023-11-24 23:59:13,511 INFO L226 Difference]: Without dead ends: 932 [2023-11-24 23:59:13,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:13,512 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:13,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2023-11-24 23:59:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 764. [2023-11-24 23:59:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 754 states have (on average 2.777188328912467) internal successors, (2094), 763 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 23:59:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2094 transitions. [2023-11-24 23:59:13,545 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2094 transitions. Word has length 14 [2023-11-24 23:59:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:13,545 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 2094 transitions. [2023-11-24 23:59:13,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2094 transitions. [2023-11-24 23:59:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:59:13,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:13,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:13,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:13,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 23:59:13,753 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:13,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:13,754 INFO L85 PathProgramCache]: Analyzing trace with hash -835165972, now seen corresponding path program 1 times [2023-11-24 23:59:13,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:13,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090314583] [2023-11-24 23:59:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:13,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:59:13,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:13,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090314583] [2023-11-24 23:59:13,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090314583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:13,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:13,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:59:13,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594877727] [2023-11-24 23:59:13,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:13,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:59:13,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:13,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:59:13,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:13,892 INFO L87 Difference]: Start difference. First operand 764 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:14,031 INFO L93 Difference]: Finished difference Result 765 states and 2047 transitions. [2023-11-24 23:59:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-24 23:59:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:14,038 INFO L225 Difference]: With dead ends: 765 [2023-11-24 23:59:14,038 INFO L226 Difference]: Without dead ends: 686 [2023-11-24 23:59:14,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:14,039 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:14,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 70 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-11-24 23:59:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 685. [2023-11-24 23:59:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 675 states have (on average 2.77037037037037) internal successors, (1870), 684 states have internal predecessors, (1870), 0 states have call successors, (0), 0 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 23:59:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1870 transitions. [2023-11-24 23:59:14,064 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1870 transitions. Word has length 15 [2023-11-24 23:59:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:14,064 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 1870 transitions. [2023-11-24 23:59:14,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1870 transitions. [2023-11-24 23:59:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:59:14,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:14,066 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1] [2023-11-24 23:59:14,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:59:14,066 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:14,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1004317203, now seen corresponding path program 2 times [2023-11-24 23:59:14,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:14,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270351823] [2023-11-24 23:59:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:14,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:14,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:14,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270351823] [2023-11-24 23:59:14,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270351823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:14,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232172113] [2023-11-24 23:59:14,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:59:14,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:14,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:14,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:14,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:59:14,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-24 23:59:14,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:14,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 23:59:14,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-24 23:59:14,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-24 23:59:14,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232172113] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:14,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625873700] [2023-11-24 23:59:14,424 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) 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 23:59:14,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:14,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-24 23:59:14,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940523520] [2023-11-24 23:59:14,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:14,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 23:59:14,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:14,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 23:59:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:59:14,428 INFO L87 Difference]: Start difference. First operand 685 states and 1870 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 23:59:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:14,781 INFO L93 Difference]: Finished difference Result 693 states and 1880 transitions. [2023-11-24 23:59:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 23:59:14,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 16 [2023-11-24 23:59:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:14,788 INFO L225 Difference]: With dead ends: 693 [2023-11-24 23:59:14,788 INFO L226 Difference]: Without dead ends: 693 [2023-11-24 23:59:14,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2023-11-24 23:59:14,789 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:14,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 74 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-24 23:59:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 679. [2023-11-24 23:59:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 670 states have (on average 2.7791044776119405) internal successors, (1862), 678 states have internal predecessors, (1862), 0 states have call successors, (0), 0 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 23:59:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1862 transitions. [2023-11-24 23:59:14,813 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1862 transitions. Word has length 16 [2023-11-24 23:59:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:14,813 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1862 transitions. [2023-11-24 23:59:14,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 23:59:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1862 transitions. [2023-11-24 23:59:14,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:59:14,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:14,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:14,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:15,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:15,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:15,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:15,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1755516439, now seen corresponding path program 1 times [2023-11-24 23:59:15,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:15,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338132298] [2023-11-24 23:59:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:15,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:59:15,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:15,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338132298] [2023-11-24 23:59:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338132298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:15,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:15,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:59:15,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653423273] [2023-11-24 23:59:15,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:15,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:59:15,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:15,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:59:15,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:15,114 INFO L87 Difference]: Start difference. First operand 679 states and 1862 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:15,257 INFO L93 Difference]: Finished difference Result 974 states and 2621 transitions. [2023-11-24 23:59:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:15,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 23:59:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:15,266 INFO L225 Difference]: With dead ends: 974 [2023-11-24 23:59:15,266 INFO L226 Difference]: Without dead ends: 938 [2023-11-24 23:59:15,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:15,267 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:15,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 65 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2023-11-24 23:59:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 758. [2023-11-24 23:59:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 749 states have (on average 2.7783711615487316) internal successors, (2081), 757 states have internal predecessors, (2081), 0 states have call successors, (0), 0 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 23:59:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2081 transitions. [2023-11-24 23:59:15,295 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2081 transitions. Word has length 16 [2023-11-24 23:59:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:15,295 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 2081 transitions. [2023-11-24 23:59:15,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2081 transitions. [2023-11-24 23:59:15,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 23:59:15,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:15,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:15,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:59:15,298 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:15,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1931519905, now seen corresponding path program 1 times [2023-11-24 23:59:15,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:15,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224527323] [2023-11-24 23:59:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:59:15,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:15,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224527323] [2023-11-24 23:59:15,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224527323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:15,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:15,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:59:15,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146324199] [2023-11-24 23:59:15,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:15,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:59:15,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:59:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:15,388 INFO L87 Difference]: Start difference. First operand 758 states and 2081 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:15,529 INFO L93 Difference]: Finished difference Result 758 states and 2034 transitions. [2023-11-24 23:59:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:15,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 23:59:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:15,535 INFO L225 Difference]: With dead ends: 758 [2023-11-24 23:59:15,535 INFO L226 Difference]: Without dead ends: 679 [2023-11-24 23:59:15,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:15,536 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:15,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2023-11-24 23:59:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2023-11-24 23:59:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 670 states have (on average 2.7776119402985073) internal successors, (1861), 678 states have internal predecessors, (1861), 0 states have call successors, (0), 0 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 23:59:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1861 transitions. [2023-11-24 23:59:15,559 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1861 transitions. Word has length 18 [2023-11-24 23:59:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:15,560 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1861 transitions. [2023-11-24 23:59:15,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:59:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1861 transitions. [2023-11-24 23:59:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:59:15,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:15,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:15,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 23:59:15,562 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:15,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1737099212, now seen corresponding path program 1 times [2023-11-24 23:59:15,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:15,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008249618] [2023-11-24 23:59:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:15,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:59:15,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008249618] [2023-11-24 23:59:15,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008249618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355181565] [2023-11-24 23:59:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:15,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:15,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:15,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:59:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:15,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:59:15,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:59:15,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:59:16,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355181565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:16,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1145277847] [2023-11-24 23:59:16,068 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 23:59:16,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:16,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-11-24 23:59:16,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745271357] [2023-11-24 23:59:16,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:16,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 23:59:16,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:16,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 23:59:16,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:59:16,072 INFO L87 Difference]: Start difference. First operand 679 states and 1861 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 23:59:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:16,954 INFO L93 Difference]: Finished difference Result 1140 states and 3112 transitions. [2023-11-24 23:59:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:59:16,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 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 23:59:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:16,967 INFO L225 Difference]: With dead ends: 1140 [2023-11-24 23:59:16,973 INFO L226 Difference]: Without dead ends: 1056 [2023-11-24 23:59:16,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:59:16,975 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 334 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:16,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 464 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:59:16,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2023-11-24 23:59:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 824. [2023-11-24 23:59:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 818 states have (on average 2.7921760391198043) internal successors, (2284), 823 states have internal predecessors, (2284), 0 states have call successors, (0), 0 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 23:59:17,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2284 transitions. [2023-11-24 23:59:17,038 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2284 transitions. Word has length 19 [2023-11-24 23:59:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:17,039 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 2284 transitions. [2023-11-24 23:59:17,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 23:59:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2284 transitions. [2023-11-24 23:59:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:59:17,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:17,041 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2023-11-24 23:59:17,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:17,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:17,252 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:17,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:17,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2100858890, now seen corresponding path program 1 times [2023-11-24 23:59:17,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:17,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508308701] [2023-11-24 23:59:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:17,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:17,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:17,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508308701] [2023-11-24 23:59:17,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508308701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:17,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893685455] [2023-11-24 23:59:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:17,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:17,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:17,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:17,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:59:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:17,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 23:59:17,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:17,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:17,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893685455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:17,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637797893] [2023-11-24 23:59:17,914 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) 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 23:59:17,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:17,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2023-11-24 23:59:17,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364770151] [2023-11-24 23:59:17,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-24 23:59:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-24 23:59:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-11-24 23:59:17,916 INFO L87 Difference]: Start difference. First operand 824 states and 2284 transitions. Second operand has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 23:59:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:18,427 INFO L93 Difference]: Finished difference Result 901 states and 2379 transitions. [2023-11-24 23:59:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-24 23:59:18,427 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 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 23:59:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:18,431 INFO L225 Difference]: With dead ends: 901 [2023-11-24 23:59:18,431 INFO L226 Difference]: Without dead ends: 901 [2023-11-24 23:59:18,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1103, Unknown=0, NotChecked=0, Total=1560 [2023-11-24 23:59:18,433 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:18,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 112 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:59:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2023-11-24 23:59:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 866. [2023-11-24 23:59:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 860 states have (on average 2.7127906976744187) internal successors, (2333), 865 states have internal predecessors, (2333), 0 states have call successors, (0), 0 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 23:59:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2333 transitions. [2023-11-24 23:59:18,461 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2333 transitions. Word has length 20 [2023-11-24 23:59:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:18,461 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 2333 transitions. [2023-11-24 23:59:18,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 23:59:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2333 transitions. [2023-11-24 23:59:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 23:59:18,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:18,464 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:18,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:18,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:18,675 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:18,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -102662530, now seen corresponding path program 1 times [2023-11-24 23:59:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651328868] [2023-11-24 23:59:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:59:18,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:18,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651328868] [2023-11-24 23:59:18,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651328868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:18,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123684312] [2023-11-24 23:59:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:18,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:18,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:18,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:59:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:18,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:59:18,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:59:19,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:59:19,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123684312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:19,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155644316] [2023-11-24 23:59:19,291 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 23:59:19,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:19,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-11-24 23:59:19,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64672860] [2023-11-24 23:59:19,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:19,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 23:59:19,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:19,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 23:59:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:59:19,295 INFO L87 Difference]: Start difference. First operand 866 states and 2333 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 23:59:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:20,145 INFO L93 Difference]: Finished difference Result 892 states and 2318 transitions. [2023-11-24 23:59:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:59:20,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 21 [2023-11-24 23:59:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:20,149 INFO L225 Difference]: With dead ends: 892 [2023-11-24 23:59:20,149 INFO L226 Difference]: Without dead ends: 669 [2023-11-24 23:59:20,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:59:20,150 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 304 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:20,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 323 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:59:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2023-11-24 23:59:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 647. [2023-11-24 23:59:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 643 states have (on average 2.6531881804043547) internal successors, (1706), 646 states have internal predecessors, (1706), 0 states have call successors, (0), 0 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 23:59:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1706 transitions. [2023-11-24 23:59:20,176 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1706 transitions. Word has length 21 [2023-11-24 23:59:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:20,176 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 1706 transitions. [2023-11-24 23:59:20,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 23:59:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1706 transitions. [2023-11-24 23:59:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 23:59:20,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:20,178 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:20,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:20,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 23:59:20,393 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:20,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1345299572, now seen corresponding path program 1 times [2023-11-24 23:59:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:20,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078985980] [2023-11-24 23:59:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:59:20,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:20,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078985980] [2023-11-24 23:59:20,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078985980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:20,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799202876] [2023-11-24 23:59:20,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:20,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:20,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:20,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:20,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 23:59:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:20,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:59:20,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:59:20,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:59:20,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799202876] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:20,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1436548011] [2023-11-24 23:59:20,954 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 23:59:20,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:20,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-11-24 23:59:20,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001912665] [2023-11-24 23:59:20,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:20,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 23:59:20,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:20,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 23:59:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:59:20,957 INFO L87 Difference]: Start difference. First operand 647 states and 1706 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 23:59:21,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:21,943 INFO L93 Difference]: Finished difference Result 1327 states and 3536 transitions. [2023-11-24 23:59:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 23:59:21,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-24 23:59:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:21,948 INFO L225 Difference]: With dead ends: 1327 [2023-11-24 23:59:21,948 INFO L226 Difference]: Without dead ends: 1243 [2023-11-24 23:59:21,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2023-11-24 23:59:21,949 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 396 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:21,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 337 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:59:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2023-11-24 23:59:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1002. [2023-11-24 23:59:21,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 998 states have (on average 2.6963927855711423) internal successors, (2691), 1001 states have internal predecessors, (2691), 0 states have call successors, (0), 0 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 23:59:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2691 transitions. [2023-11-24 23:59:21,989 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2691 transitions. Word has length 23 [2023-11-24 23:59:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:21,989 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 2691 transitions. [2023-11-24 23:59:21,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 23:59:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2691 transitions. [2023-11-24 23:59:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 23:59:21,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:21,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:22,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:22,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 23:59:22,199 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:22,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:22,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1021211709, now seen corresponding path program 1 times [2023-11-24 23:59:22,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:22,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599638625] [2023-11-24 23:59:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:59:22,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:22,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599638625] [2023-11-24 23:59:22,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599638625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:22,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393060330] [2023-11-24 23:59:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:22,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:22,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:22,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:22,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 23:59:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:22,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:59:22,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:59:22,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:59:22,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393060330] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:22,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885224036] [2023-11-24 23:59:22,718 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 23:59:22,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:22,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-11-24 23:59:22,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912254015] [2023-11-24 23:59:22,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:22,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 23:59:22,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:22,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 23:59:22,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:59:22,725 INFO L87 Difference]: Start difference. First operand 1002 states and 2691 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 23:59:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:23,537 INFO L93 Difference]: Finished difference Result 1295 states and 3465 transitions. [2023-11-24 23:59:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 23:59:23,538 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 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 23:59:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:23,542 INFO L225 Difference]: With dead ends: 1295 [2023-11-24 23:59:23,542 INFO L226 Difference]: Without dead ends: 1072 [2023-11-24 23:59:23,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2023-11-24 23:59:23,543 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 367 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:23,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 276 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:59:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2023-11-24 23:59:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 970. [2023-11-24 23:59:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 966 states have (on average 2.801242236024845) internal successors, (2706), 969 states have internal predecessors, (2706), 0 states have call successors, (0), 0 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 23:59:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2706 transitions. [2023-11-24 23:59:23,576 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2706 transitions. Word has length 25 [2023-11-24 23:59:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:23,577 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 2706 transitions. [2023-11-24 23:59:23,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 23:59:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2706 transitions. [2023-11-24 23:59:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 23:59:23,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:23,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:23,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:23,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:23,786 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:23,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:23,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1365226961, now seen corresponding path program 2 times [2023-11-24 23:59:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:23,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457800351] [2023-11-24 23:59:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:23,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:59:24,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:24,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457800351] [2023-11-24 23:59:24,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457800351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:24,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35392600] [2023-11-24 23:59:24,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:59:24,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:24,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:24,104 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:24,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 23:59:24,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-24 23:59:24,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:24,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:59:24,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:59:24,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:59:24,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35392600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:24,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1564236157] [2023-11-24 23:59:24,391 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 23:59:24,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:24,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 3, 3] total 15 [2023-11-24 23:59:24,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686015486] [2023-11-24 23:59:24,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:24,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 23:59:24,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 23:59:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:59:24,393 INFO L87 Difference]: Start difference. First operand 970 states and 2706 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 23:59:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:25,544 INFO L93 Difference]: Finished difference Result 1778 states and 4917 transitions. [2023-11-24 23:59:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 23:59:25,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-24 23:59:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:25,551 INFO L225 Difference]: With dead ends: 1778 [2023-11-24 23:59:25,551 INFO L226 Difference]: Without dead ends: 1478 [2023-11-24 23:59:25,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 23:59:25,553 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 307 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:25,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 362 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:59:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2023-11-24 23:59:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 897. [2023-11-24 23:59:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 895 states have (on average 2.5608938547486035) internal successors, (2292), 896 states have internal predecessors, (2292), 0 states have call successors, (0), 0 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 23:59:25,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2292 transitions. [2023-11-24 23:59:25,597 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2292 transitions. Word has length 30 [2023-11-24 23:59:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:25,598 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 2292 transitions. [2023-11-24 23:59:25,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 23:59:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2292 transitions. [2023-11-24 23:59:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:59:25,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:25,600 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:25,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:25,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:25,807 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:25,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2066582681, now seen corresponding path program 2 times [2023-11-24 23:59:25,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:25,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775078772] [2023-11-24 23:59:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:25,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:59:26,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:26,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775078772] [2023-11-24 23:59:26,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775078772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:26,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931949698] [2023-11-24 23:59:26,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:59:26,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:26,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:26,068 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:26,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 23:59:26,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-24 23:59:26,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:26,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:59:26,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:59:26,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:59:26,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931949698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:26,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090997871] [2023-11-24 23:59:26,367 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 23:59:26,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:26,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 3, 3] total 15 [2023-11-24 23:59:26,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586700893] [2023-11-24 23:59:26,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:26,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 23:59:26,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:26,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 23:59:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:59:26,371 INFO L87 Difference]: Start difference. First operand 897 states and 2292 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 23:59:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:27,262 INFO L93 Difference]: Finished difference Result 956 states and 2330 transitions. [2023-11-24 23:59:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 23:59:27,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 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 23:59:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:27,263 INFO L225 Difference]: With dead ends: 956 [2023-11-24 23:59:27,263 INFO L226 Difference]: Without dead ends: 136 [2023-11-24 23:59:27,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 23:59:27,265 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 249 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:27,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 212 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:59:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-24 23:59:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 44. [2023-11-24 23:59:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 23:59:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-11-24 23:59:27,267 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 32 [2023-11-24 23:59:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:27,268 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-11-24 23:59:27,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 23:59:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-11-24 23:59:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-24 23:59:27,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:27,268 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2023-11-24 23:59:27,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:27,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-24 23:59:27,476 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-24 23:59:27,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1431694287, now seen corresponding path program 2 times [2023-11-24 23:59:27,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:27,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143974056] [2023-11-24 23:59:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:27,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:28,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:28,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143974056] [2023-11-24 23:59:28,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143974056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:28,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076004018] [2023-11-24 23:59:28,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:59:28,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:28,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:28,130 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:28,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 23:59:28,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-24 23:59:28,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:59:28,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 23:59:28,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-24 23:59:28,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-24 23:59:28,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076004018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:28,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188733448] [2023-11-24 23:59:28,461 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) 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 23:59:28,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:59:28,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 3, 3] total 30 [2023-11-24 23:59:28,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517661063] [2023-11-24 23:59:28,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:59:28,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 23:59:28,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:28,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 23:59:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2023-11-24 23:59:28,464 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 31 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 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 23:59:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:29,256 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2023-11-24 23:59:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 23:59:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 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 41 [2023-11-24 23:59:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:29,257 INFO L225 Difference]: With dead ends: 85 [2023-11-24 23:59:29,257 INFO L226 Difference]: Without dead ends: 0 [2023-11-24 23:59:29,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=914, Invalid=2508, Unknown=0, NotChecked=0, Total=3422 [2023-11-24 23:59:29,259 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 302 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:29,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 0 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-24 23:59:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-24 23:59:29,261 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 23:59:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-24 23:59:29,261 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2023-11-24 23:59:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:29,261 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-24 23:59:29,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 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 23:59:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-24 23:59:29,262 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-24 23:59:29,264 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 22 remaining) [2023-11-24 23:59:29,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 22 remaining) [2023-11-24 23:59:29,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 22 remaining) [2023-11-24 23:59:29,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 22 remaining) [2023-11-24 23:59:29,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 22 remaining) [2023-11-24 23:59:29,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 22 remaining) [2023-11-24 23:59:29,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 22 remaining) [2023-11-24 23:59:29,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 22 remaining) [2023-11-24 23:59:29,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 22 remaining) [2023-11-24 23:59:29,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 22 remaining) [2023-11-24 23:59:29,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 22 remaining) [2023-11-24 23:59:29,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 22 remaining) [2023-11-24 23:59:29,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 22 remaining) [2023-11-24 23:59:29,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 22 remaining) [2023-11-24 23:59:29,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 22 remaining) [2023-11-24 23:59:29,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 22 remaining) [2023-11-24 23:59:29,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 22 remaining) [2023-11-24 23:59:29,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 22 remaining) [2023-11-24 23:59:29,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 22 remaining) [2023-11-24 23:59:29,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 22 remaining) [2023-11-24 23:59:29,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 22 remaining) [2023-11-24 23:59:29,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 22 remaining) [2023-11-24 23:59:29,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:29,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-24 23:59:29,477 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:29,480 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-24 23:59:29,480 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 23:59:29,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 11:59:29 BasicIcfg [2023-11-24 23:59:29,483 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 23:59:29,483 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 23:59:29,484 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 23:59:29,484 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 23:59:29,484 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:07" (3/4) ... [2023-11-24 23:59:29,485 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-24 23:59:29,487 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-24 23:59:29,488 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-24 23:59:29,495 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 140 nodes and edges [2023-11-24 23:59:29,496 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2023-11-24 23:59:29,497 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-24 23:59:29,497 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-24 23:59:29,600 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/witness.graphml [2023-11-24 23:59:29,600 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/bin/utaipan-verify-SwPr7d2a91/witness.yml [2023-11-24 23:59:29,601 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 23:59:29,604 INFO L158 Benchmark]: Toolchain (without parser) took 23503.36ms. Allocated memory was 165.7MB in the beginning and 239.1MB in the end (delta: 73.4MB). Free memory was 118.7MB in the beginning and 88.9MB in the end (delta: 29.9MB). Peak memory consumption was 104.8MB. Max. memory is 16.1GB. [2023-11-24 23:59:29,605 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 130.0MB. Free memory is still 76.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:59:29,605 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.95ms. Allocated memory is still 165.7MB. Free memory was 118.7MB in the beginning and 106.6MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 23:59:29,606 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.93ms. Allocated memory is still 165.7MB. Free memory was 106.1MB in the beginning and 104.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:59:29,606 INFO L158 Benchmark]: Boogie Preprocessor took 39.62ms. Allocated memory is still 165.7MB. Free memory was 104.5MB in the beginning and 102.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:59:29,607 INFO L158 Benchmark]: RCFGBuilder took 1192.26ms. Allocated memory is still 165.7MB. Free memory was 102.6MB in the beginning and 109.0MB in the end (delta: -6.4MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. [2023-11-24 23:59:29,607 INFO L158 Benchmark]: TraceAbstraction took 21669.30ms. Allocated memory was 165.7MB in the beginning and 239.1MB in the end (delta: 73.4MB). Free memory was 108.1MB in the beginning and 95.2MB in the end (delta: 12.9MB). Peak memory consumption was 87.2MB. Max. memory is 16.1GB. [2023-11-24 23:59:29,610 INFO L158 Benchmark]: Witness Printer took 117.28ms. Allocated memory is still 239.1MB. Free memory was 95.2MB in the beginning and 88.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-24 23:59:29,616 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 130.0MB. Free memory is still 76.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 394.95ms. Allocated memory is still 165.7MB. Free memory was 118.7MB in the beginning and 106.6MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.93ms. Allocated memory is still 165.7MB. Free memory was 106.1MB in the beginning and 104.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.62ms. Allocated memory is still 165.7MB. Free memory was 104.5MB in the beginning and 102.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1192.26ms. Allocated memory is still 165.7MB. Free memory was 102.6MB in the beginning and 109.0MB in the end (delta: -6.4MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. * TraceAbstraction took 21669.30ms. Allocated memory was 165.7MB in the beginning and 239.1MB in the end (delta: 73.4MB). Free memory was 108.1MB in the beginning and 95.2MB in the end (delta: 12.9MB). Peak memory consumption was 87.2MB. Max. memory is 16.1GB. * Witness Printer took 117.28ms. Allocated memory is still 239.1MB. Free memory was 95.2MB in the beginning and 88.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. 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: 49]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 49]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 57]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 57]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 69]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 69]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 77]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 77]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 115]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 115]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 115]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 115]: 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, 86 locations, 22 error locations. Started 1 CEGAR loops. OverallTime: 21.5s, OverallIterations: 22, TraceHistogramMax: 13, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2906 SdHoareTripleChecker+Valid, 6.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2906 mSDsluCounter, 2967 SdHoareTripleChecker+Invalid, 5.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2470 mSDsCounter, 233 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8955 IncrementalHoareTripleChecker+Invalid, 9188 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 233 mSolverCounterUnsat, 497 mSDtfsCounter, 8955 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 746 GetRequests, 397 SyntacticMatches, 11 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2848occurred in iteration=7, InterpolantAutomatonStates: 246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 22 MinimizatonAttempts, 3142 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 632 NumberOfCodeBlocks, 544 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 822 ConstructedInterpolants, 0 QuantifiedInterpolants, 2745 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1923 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 44 InterpolantComputations, 12 PerfectInterpolantSequences, 636/1176 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 12 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-24 23:59:29,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9fa402-76e0-4ec0-8e29-65bf265205c6/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