./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 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_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire --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 f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:35:57,626 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:35:57,753 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-23 20:35:57,765 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:35:57,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:35:57,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:35:57,809 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:35:57,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:35:57,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:35:57,816 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:35:57,816 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:35:57,817 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:35:57,818 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:35:57,820 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:35:57,820 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:35:57,821 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:35:57,821 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:35:57,821 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:35:57,822 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:35:57,822 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:35:57,824 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:35:57,825 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:35:57,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:35:57,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:35:57,827 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:35:57,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:35:57,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:35:57,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:35:57,829 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:35:57,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:35:57,830 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:35:57,831 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 20:35:57,831 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:35:57,831 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:35:57,831 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:35:57,832 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:35:57,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:35:57,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:35:57,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:35:57,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:35:57,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:35:57,834 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:35:57,834 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:35:57,834 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:35:57,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:35:57,835 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:35:57,835 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:35:57,835 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:35:57,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:35:57,836 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_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2023-11-23 20:35:58,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:35:58,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:35:58,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:35:58,178 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:35:58,178 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:35:58,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2023-11-23 20:36:01,274 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:01,588 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:01,589 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2023-11-23 20:36:01,625 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/data/9172b2c9b/f8529979d442408289b7138277338415/FLAG80c3bacba [2023-11-23 20:36:01,649 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/data/9172b2c9b/f8529979d442408289b7138277338415 [2023-11-23 20:36:01,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:01,654 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:01,655 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:01,656 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:01,661 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:01,662 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:01" (1/1) ... [2023-11-23 20:36:01,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b34c6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:01, skipping insertion in model container [2023-11-23 20:36:01,664 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:01" (1/1) ... [2023-11-23 20:36:01,734 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:02,374 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 20:36:02,375 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 20:36:02,376 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 20:36:02,377 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 20:36:02,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:02,479 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:02,540 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 20:36:02,541 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 20:36:02,541 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 20:36:02,542 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 20:36:02,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:02,683 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:02,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02 WrapperNode [2023-11-23 20:36:02,684 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:02,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:02,686 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:02,686 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:02,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,739 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,804 INFO L138 Inliner]: procedures = 279, calls = 73, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 369 [2023-11-23 20:36:02,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:02,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:02,806 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:02,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:02,816 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,840 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,872 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,884 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:02,886 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:02,887 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:02,888 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:02,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:02,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:02,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:02,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:36:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-23 20:36:02,974 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-23 20:36:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 20:36:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:36:02,976 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-23 20:36:02,976 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-23 20:36:02,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:36:02,977 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 20:36:02,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:36:02,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:02,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:36:02,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:02,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:02,989 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 20:36:03,190 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:03,193 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:03,888 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:04,278 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:04,278 INFO L309 CfgBuilder]: Removed 30 assume(true) statements. [2023-11-23 20:36:04,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:04 BoogieIcfgContainer [2023-11-23 20:36:04,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:04,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:04,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:04,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:04,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:01" (1/3) ... [2023-11-23 20:36:04,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e321837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:04, skipping insertion in model container [2023-11-23 20:36:04,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02" (2/3) ... [2023-11-23 20:36:04,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e321837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:04, skipping insertion in model container [2023-11-23 20:36:04,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:04" (3/3) ... [2023-11-23 20:36:04,291 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2023-11-23 20:36:04,302 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 20:36:04,313 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:04,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-23 20:36:04,314 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 20:36:04,433 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-23 20:36:04,477 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 140 places, 167 transitions, 354 flow [2023-11-23 20:36:05,810 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28302 states, 27686 states have (on average 3.4469768113848156) internal successors, (95433), 28301 states have internal predecessors, (95433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:05,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:05,841 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;@463930e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:05,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-11-23 20:36:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 28302 states, 27686 states have (on average 3.4469768113848156) internal successors, (95433), 28301 states have internal predecessors, (95433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 20:36:06,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:06,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 20:36:06,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:06,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:06,016 INFO L85 PathProgramCache]: Analyzing trace with hash 29307036, now seen corresponding path program 1 times [2023-11-23 20:36:06,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:06,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087035088] [2023-11-23 20:36:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:06,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:06,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:06,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933861205] [2023-11-23 20:36:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:06,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:06,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:06,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:06,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:36:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:06,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:06,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:06,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:06,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:06,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087035088] [2023-11-23 20:36:06,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:06,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933861205] [2023-11-23 20:36:06,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933861205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:06,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:06,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 20:36:06,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141728380] [2023-11-23 20:36:06,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:06,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:06,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:06,500 INFO L87 Difference]: Start difference. First operand has 28302 states, 27686 states have (on average 3.4469768113848156) internal successors, (95433), 28301 states have internal predecessors, (95433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2023-11-23 20:36:07,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:07,487 INFO L93 Difference]: Finished difference Result 28314 states and 83266 transitions. [2023-11-23 20:36:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:07,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2023-11-23 20:36:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:07,862 INFO L225 Difference]: With dead ends: 28314 [2023-11-23 20:36:07,862 INFO L226 Difference]: Without dead ends: 28307 [2023-11-23 20:36:07,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:07,871 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:07,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28307 states. [2023-11-23 20:36:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28307 to 28301. [2023-11-23 20:36:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28301 states, 27690 states have (on average 3.006464427591188) internal successors, (83249), 28300 states have internal predecessors, (83249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28301 states to 28301 states and 83249 transitions. [2023-11-23 20:36:09,739 INFO L78 Accepts]: Start accepts. Automaton has 28301 states and 83249 transitions. Word has length 4 [2023-11-23 20:36:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:09,740 INFO L495 AbstractCegarLoop]: Abstraction has 28301 states and 83249 transitions. [2023-11-23 20:36:09,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2023-11-23 20:36:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28301 states and 83249 transitions. [2023-11-23 20:36:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 20:36:09,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:09,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 20:36:09,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:09,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:09,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:09,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 29307082, now seen corresponding path program 1 times [2023-11-23 20:36:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:09,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336479146] [2023-11-23 20:36:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:10,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:10,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336479146] [2023-11-23 20:36:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336479146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:10,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:10,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:10,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189911021] [2023-11-23 20:36:10,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:10,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:10,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:10,156 INFO L87 Difference]: Start difference. First operand 28301 states and 83249 transitions. Second operand has 3 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) [2023-11-23 20:36:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:10,994 INFO L93 Difference]: Finished difference Result 28313 states and 83263 transitions. [2023-11-23 20:36:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:10,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2023-11-23 20:36:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:11,306 INFO L225 Difference]: With dead ends: 28313 [2023-11-23 20:36:11,313 INFO L226 Difference]: Without dead ends: 28313 [2023-11-23 20:36:11,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:11,315 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:11,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 138 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28313 states. [2023-11-23 20:36:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28313 to 28305. [2023-11-23 20:36:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28305 states, 27694 states have (on average 3.0061746226619483) internal successors, (83253), 28304 states have internal predecessors, (83253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28305 states to 28305 states and 83253 transitions. [2023-11-23 20:36:12,487 INFO L78 Accepts]: Start accepts. Automaton has 28305 states and 83253 transitions. Word has length 4 [2023-11-23 20:36:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:12,487 INFO L495 AbstractCegarLoop]: Abstraction has 28305 states and 83253 transitions. [2023-11-23 20:36:12,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-23 20:36:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 28305 states and 83253 transitions. [2023-11-23 20:36:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 20:36:12,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:12,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 20:36:12,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:36:12,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:12,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:12,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1900677956, now seen corresponding path program 1 times [2023-11-23 20:36:12,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:12,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896348995] [2023-11-23 20:36:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:12,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:12,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336359480] [2023-11-23 20:36:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:12,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:12,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:12,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:12,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:36:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:12,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:12,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:12,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:12,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896348995] [2023-11-23 20:36:12,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:12,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336359480] [2023-11-23 20:36:12,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336359480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:12,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:12,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:12,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671607293] [2023-11-23 20:36:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:12,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:12,839 INFO L87 Difference]: Start difference. First operand 28305 states and 83253 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:13,384 INFO L93 Difference]: Finished difference Result 28304 states and 83251 transitions. [2023-11-23 20:36:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:13,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-23 20:36:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:13,741 INFO L225 Difference]: With dead ends: 28304 [2023-11-23 20:36:13,742 INFO L226 Difference]: Without dead ends: 28304 [2023-11-23 20:36:13,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:13,746 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 7 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:13,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 195 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28304 states. [2023-11-23 20:36:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28304 to 28304. [2023-11-23 20:36:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28304 states, 27694 states have (on average 3.0061024048530367) internal successors, (83251), 28303 states have internal predecessors, (83251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28304 states to 28304 states and 83251 transitions. [2023-11-23 20:36:14,854 INFO L78 Accepts]: Start accepts. Automaton has 28304 states and 83251 transitions. Word has length 6 [2023-11-23 20:36:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:14,855 INFO L495 AbstractCegarLoop]: Abstraction has 28304 states and 83251 transitions. [2023-11-23 20:36:14,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 28304 states and 83251 transitions. [2023-11-23 20:36:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:36:14,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:14,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:14,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:15,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:15,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:15,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:15,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1208526474, now seen corresponding path program 1 times [2023-11-23 20:36:15,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:15,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782561682] [2023-11-23 20:36:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:15,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:15,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:15,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592465753] [2023-11-23 20:36:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:15,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:15,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:15,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:15,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:36:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:15,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:15,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:15,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:15,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:15,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782561682] [2023-11-23 20:36:15,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:15,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592465753] [2023-11-23 20:36:15,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592465753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:15,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:15,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:15,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168157954] [2023-11-23 20:36:15,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:15,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:15,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:15,335 INFO L87 Difference]: Start difference. First operand 28304 states and 83251 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:16,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:16,107 INFO L93 Difference]: Finished difference Result 28310 states and 83257 transitions. [2023-11-23 20:36:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:16,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 20:36:16,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:16,246 INFO L225 Difference]: With dead ends: 28310 [2023-11-23 20:36:16,246 INFO L226 Difference]: Without dead ends: 28310 [2023-11-23 20:36:16,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:16,249 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:16,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 202 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28310 states. [2023-11-23 20:36:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28310 to 28310. [2023-11-23 20:36:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28310 states, 27700 states have (on average 3.0056678700361013) internal successors, (83257), 28309 states have internal predecessors, (83257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28310 states to 28310 states and 83257 transitions. [2023-11-23 20:36:17,475 INFO L78 Accepts]: Start accepts. Automaton has 28310 states and 83257 transitions. Word has length 7 [2023-11-23 20:36:17,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:17,475 INFO L495 AbstractCegarLoop]: Abstraction has 28310 states and 83257 transitions. [2023-11-23 20:36:17,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 28310 states and 83257 transitions. [2023-11-23 20:36:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:36:17,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:17,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:17,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:17,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:17,677 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:17,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1752804694, now seen corresponding path program 1 times [2023-11-23 20:36:17,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:17,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169005493] [2023-11-23 20:36:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:17,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:17,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:17,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426106216] [2023-11-23 20:36:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:17,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:17,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:17,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:17,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:36:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:17,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:36:17,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:17,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:17,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:17,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169005493] [2023-11-23 20:36:17,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:17,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426106216] [2023-11-23 20:36:17,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426106216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:17,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423372310] [2023-11-23 20:36:17,989 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) [2023-11-23 20:36:17,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:36:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-23 20:36:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061151923] [2023-11-23 20:36:17,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:17,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:36:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:36:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:36:17,994 INFO L87 Difference]: Start difference. First operand 28310 states and 83257 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:18,666 INFO L93 Difference]: Finished difference Result 28324 states and 83271 transitions. [2023-11-23 20:36:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:36:18,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 20:36:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:18,773 INFO L225 Difference]: With dead ends: 28324 [2023-11-23 20:36:18,773 INFO L226 Difference]: Without dead ends: 28324 [2023-11-23 20:36:18,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:36:18,774 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 23 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:18,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 328 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:36:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28324 states. [2023-11-23 20:36:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28324 to 28322. [2023-11-23 20:36:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28322 states, 27712 states have (on average 3.0048715357967666) internal successors, (83271), 28321 states have internal predecessors, (83271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28322 states to 28322 states and 83271 transitions. [2023-11-23 20:36:19,793 INFO L78 Accepts]: Start accepts. Automaton has 28322 states and 83271 transitions. Word has length 9 [2023-11-23 20:36:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:19,794 INFO L495 AbstractCegarLoop]: Abstraction has 28322 states and 83271 transitions. [2023-11-23 20:36:19,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 28322 states and 83271 transitions. [2023-11-23 20:36:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:36:19,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:19,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1] [2023-11-23 20:36:19,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:20,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:20,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:20,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash 798457610, now seen corresponding path program 1 times [2023-11-23 20:36:20,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:20,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031938599] [2023-11-23 20:36:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:20,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:20,093 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:20,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979441281] [2023-11-23 20:36:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:20,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:20,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:20,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:36:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:20,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:36:20,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:20,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:20,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:20,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031938599] [2023-11-23 20:36:20,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979441281] [2023-11-23 20:36:20,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979441281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020287741] [2023-11-23 20:36:20,519 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) [2023-11-23 20:36:20,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:36:20,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-23 20:36:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619185515] [2023-11-23 20:36:20,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 20:36:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 20:36:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:36:20,521 INFO L87 Difference]: Start difference. First operand 28322 states and 83271 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:21,490 INFO L93 Difference]: Finished difference Result 28335 states and 83283 transitions. [2023-11-23 20:36:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:36:21,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 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 17 [2023-11-23 20:36:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:22,052 INFO L225 Difference]: With dead ends: 28335 [2023-11-23 20:36:22,063 INFO L226 Difference]: Without dead ends: 28335 [2023-11-23 20:36:22,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:36:22,066 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 32 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:22,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 390 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:36:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28335 states. [2023-11-23 20:36:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28335 to 28321. [2023-11-23 20:36:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28321 states, 27712 states have (on average 3.004799364896074) internal successors, (83269), 28320 states have internal predecessors, (83269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28321 states to 28321 states and 83269 transitions. [2023-11-23 20:36:22,677 INFO L78 Accepts]: Start accepts. Automaton has 28321 states and 83269 transitions. Word has length 17 [2023-11-23 20:36:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:22,677 INFO L495 AbstractCegarLoop]: Abstraction has 28321 states and 83269 transitions. [2023-11-23 20:36:22,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 28321 states and 83269 transitions. [2023-11-23 20:36:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 20:36:22,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:22,679 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-11-23 20:36:22,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:22,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:22,880 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:22,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1481349674, now seen corresponding path program 2 times [2023-11-23 20:36:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:22,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061994596] [2023-11-23 20:36:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:22,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:23,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:23,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812384165] [2023-11-23 20:36:23,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:36:23,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:23,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:23,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:23,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:36:23,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 20:36:23,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:23,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:23,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 20:36:23,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:23,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:23,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061994596] [2023-11-23 20:36:23,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:23,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812384165] [2023-11-23 20:36:23,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812384165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:23,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:23,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:23,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198219347] [2023-11-23 20:36:23,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:23,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:23,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:23,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:23,679 INFO L87 Difference]: Start difference. First operand 28321 states and 83269 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-11-23 20:36:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:24,210 INFO L93 Difference]: Finished difference Result 28320 states and 83268 transitions. [2023-11-23 20:36:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 19 [2023-11-23 20:36:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:24,305 INFO L225 Difference]: With dead ends: 28320 [2023-11-23 20:36:24,305 INFO L226 Difference]: Without dead ends: 28320 [2023-11-23 20:36:24,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:24,306 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:24,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 190 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28320 states. [2023-11-23 20:36:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28320 to 28320. [2023-11-23 20:36:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28320 states, 27712 states have (on average 3.0047632794457275) internal successors, (83268), 28319 states have internal predecessors, (83268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28320 states to 28320 states and 83268 transitions. [2023-11-23 20:36:25,196 INFO L78 Accepts]: Start accepts. Automaton has 28320 states and 83268 transitions. Word has length 19 [2023-11-23 20:36:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:25,196 INFO L495 AbstractCegarLoop]: Abstraction has 28320 states and 83268 transitions. [2023-11-23 20:36:25,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-11-23 20:36:25,197 INFO L276 IsEmpty]: Start isEmpty. Operand 28320 states and 83268 transitions. [2023-11-23 20:36:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:36:25,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:25,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-11-23 20:36:25,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:25,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:36:25,398 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:25,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:25,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1322801374, now seen corresponding path program 1 times [2023-11-23 20:36:25,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:25,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232207506] [2023-11-23 20:36:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:25,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:25,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123555631] [2023-11-23 20:36:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:25,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:25,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:25,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:25,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:36:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:26,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:36:26,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:26,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:26,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:26,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232207506] [2023-11-23 20:36:26,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:26,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123555631] [2023-11-23 20:36:26,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123555631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:26,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672420646] [2023-11-23 20:36:26,226 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) [2023-11-23 20:36:26,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:36:26,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-23 20:36:26,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156776658] [2023-11-23 20:36:26,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:26,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 20:36:26,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 20:36:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:36:26,230 INFO L87 Difference]: Start difference. First operand 28320 states and 83268 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:27,426 INFO L93 Difference]: Finished difference Result 28370 states and 83316 transitions. [2023-11-23 20:36:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 20:36:27,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-23 20:36:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:27,519 INFO L225 Difference]: With dead ends: 28370 [2023-11-23 20:36:27,520 INFO L226 Difference]: Without dead ends: 28370 [2023-11-23 20:36:27,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2023-11-23 20:36:27,521 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 72 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:27,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 321 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 20:36:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28370 states. [2023-11-23 20:36:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28370 to 28360. [2023-11-23 20:36:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28360 states, 27752 states have (on average 3.0021620063418855) internal successors, (83316), 28359 states have internal predecessors, (83316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28360 states to 28360 states and 83316 transitions. [2023-11-23 20:36:28,520 INFO L78 Accepts]: Start accepts. Automaton has 28360 states and 83316 transitions. Word has length 20 [2023-11-23 20:36:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:28,520 INFO L495 AbstractCegarLoop]: Abstraction has 28360 states and 83316 transitions. [2023-11-23 20:36:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 28360 states and 83316 transitions. [2023-11-23 20:36:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 20:36:28,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:28,522 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2023-11-23 20:36:28,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:28,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:28,736 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:28,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:28,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2031282142, now seen corresponding path program 2 times [2023-11-23 20:36:28,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:28,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638403026] [2023-11-23 20:36:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:28,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:28,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:28,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841183753] [2023-11-23 20:36:28,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:36:28,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:28,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:28,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:28,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 20:36:29,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 20:36:29,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:29,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:29,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-23 20:36:29,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:29,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638403026] [2023-11-23 20:36:29,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841183753] [2023-11-23 20:36:29,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841183753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:29,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:29,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:29,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896222057] [2023-11-23 20:36:29,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:29,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:29,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:29,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:29,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:29,303 INFO L87 Difference]: Start difference. First operand 28360 states and 83316 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:29,955 INFO L93 Difference]: Finished difference Result 28362 states and 83318 transitions. [2023-11-23 20:36:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:29,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-23 20:36:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:30,059 INFO L225 Difference]: With dead ends: 28362 [2023-11-23 20:36:30,059 INFO L226 Difference]: Without dead ends: 28362 [2023-11-23 20:36:30,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:30,060 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:30,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 199 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:36:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28362 states. [2023-11-23 20:36:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28362 to 28362. [2023-11-23 20:36:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28362 states, 27754 states have (on average 3.0020177271744615) internal successors, (83318), 28361 states have internal predecessors, (83318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28362 states to 28362 states and 83318 transitions. [2023-11-23 20:36:30,999 INFO L78 Accepts]: Start accepts. Automaton has 28362 states and 83318 transitions. Word has length 40 [2023-11-23 20:36:31,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:31,000 INFO L495 AbstractCegarLoop]: Abstraction has 28362 states and 83318 transitions. [2023-11-23 20:36:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 28362 states and 83318 transitions. [2023-11-23 20:36:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 20:36:31,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:31,002 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:31,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:31,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:31,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:31,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:31,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1231938404, now seen corresponding path program 1 times [2023-11-23 20:36:31,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:31,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457578789] [2023-11-23 20:36:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:31,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:31,342 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:31,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188467591] [2023-11-23 20:36:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:31,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:31,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:31,344 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:31,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:36:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:31,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 20:36:31,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:32,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:32,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457578789] [2023-11-23 20:36:32,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188467591] [2023-11-23 20:36:32,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188467591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214543650] [2023-11-23 20:36:32,462 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) [2023-11-23 20:36:32,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:36:32,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-11-23 20:36:32,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537641114] [2023-11-23 20:36:32,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:32,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-23 20:36:32,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-23 20:36:32,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2023-11-23 20:36:32,466 INFO L87 Difference]: Start difference. First operand 28362 states and 83318 transitions. Second operand has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:34,898 INFO L93 Difference]: Finished difference Result 28468 states and 83414 transitions. [2023-11-23 20:36:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-23 20:36:34,899 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 0 states have call successors, (0), 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 45 [2023-11-23 20:36:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:34,983 INFO L225 Difference]: With dead ends: 28468 [2023-11-23 20:36:34,983 INFO L226 Difference]: Without dead ends: 28468 [2023-11-23 20:36:34,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=623, Invalid=1447, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 20:36:34,984 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 112 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:34,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 641 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 20:36:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28468 states. [2023-11-23 20:36:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28468 to 28442. [2023-11-23 20:36:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28442 states, 27834 states have (on average 2.9968383990802616) internal successors, (83414), 28441 states have internal predecessors, (83414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28442 states to 28442 states and 83414 transitions. [2023-11-23 20:36:35,940 INFO L78 Accepts]: Start accepts. Automaton has 28442 states and 83414 transitions. Word has length 45 [2023-11-23 20:36:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:35,941 INFO L495 AbstractCegarLoop]: Abstraction has 28442 states and 83414 transitions. [2023-11-23 20:36:35,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 28442 states and 83414 transitions. [2023-11-23 20:36:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-23 20:36:35,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:35,944 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:35,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-23 20:36:36,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 20:36:36,145 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:36,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1912339100, now seen corresponding path program 2 times [2023-11-23 20:36:36,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:36,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441052673] [2023-11-23 20:36:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:36,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:36,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:36,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2147077174] [2023-11-23 20:36:36,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:36:36,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:36,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:36,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:36,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 20:36:37,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 20:36:37,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:37,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:37,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2023-11-23 20:36:37,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:37,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:37,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441052673] [2023-11-23 20:36:37,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:37,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147077174] [2023-11-23 20:36:37,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147077174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:37,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:37,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:37,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224854686] [2023-11-23 20:36:37,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:37,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:37,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:37,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:37,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:37,241 INFO L87 Difference]: Start difference. First operand 28442 states and 83414 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:38,088 INFO L93 Difference]: Finished difference Result 28401 states and 83330 transitions. [2023-11-23 20:36:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:38,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-23 20:36:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:38,161 INFO L225 Difference]: With dead ends: 28401 [2023-11-23 20:36:38,161 INFO L226 Difference]: Without dead ends: 28401 [2023-11-23 20:36:38,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:38,162 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 92 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:38,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 217 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:38,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28401 states. [2023-11-23 20:36:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28401 to 28401. [2023-11-23 20:36:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28401 states, 27800 states have (on average 2.9974820143884893) internal successors, (83330), 28400 states have internal predecessors, (83330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28401 states to 28401 states and 83330 transitions. [2023-11-23 20:36:38,700 INFO L78 Accepts]: Start accepts. Automaton has 28401 states and 83330 transitions. Word has length 85 [2023-11-23 20:36:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:38,700 INFO L495 AbstractCegarLoop]: Abstraction has 28401 states and 83330 transitions. [2023-11-23 20:36:38,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28401 states and 83330 transitions. [2023-11-23 20:36:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-23 20:36:38,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:38,702 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:38,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:38,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:38,904 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:38,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:38,905 INFO L85 PathProgramCache]: Analyzing trace with hash 847030998, now seen corresponding path program 1 times [2023-11-23 20:36:38,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:38,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444326439] [2023-11-23 20:36:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:38,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:39,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:39,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376366919] [2023-11-23 20:36:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:39,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:39,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:39,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:39,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 20:36:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:40,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 20:36:40,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 1 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:40,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 1 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:42,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:42,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444326439] [2023-11-23 20:36:42,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:42,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376366919] [2023-11-23 20:36:42,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376366919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:42,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967772112] [2023-11-23 20:36:42,018 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) [2023-11-23 20:36:42,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:36:42,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 61 [2023-11-23 20:36:42,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475578635] [2023-11-23 20:36:42,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:42,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-23 20:36:42,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:42,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-23 20:36:42,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2023-11-23 20:36:42,023 INFO L87 Difference]: Start difference. First operand 28401 states and 83330 transitions. Second operand has 61 states, 61 states have (on average 2.5901639344262297) internal successors, (158), 61 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:46,677 INFO L93 Difference]: Finished difference Result 28607 states and 83510 transitions. [2023-11-23 20:36:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-23 20:36:46,678 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.5901639344262297) internal successors, (158), 61 states have internal predecessors, (158), 0 states have call successors, (0), 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 86 [2023-11-23 20:36:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:46,756 INFO L225 Difference]: With dead ends: 28607 [2023-11-23 20:36:46,756 INFO L226 Difference]: Without dead ends: 28607 [2023-11-23 20:36:46,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2323, Invalid=5687, Unknown=0, NotChecked=0, Total=8010 [2023-11-23 20:36:46,759 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 382 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:46,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 442 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-23 20:36:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28607 states. [2023-11-23 20:36:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28607 to 28551. [2023-11-23 20:36:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28551 states, 27950 states have (on average 2.98783542039356) internal successors, (83510), 28550 states have internal predecessors, (83510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28551 states to 28551 states and 83510 transitions. [2023-11-23 20:36:47,483 INFO L78 Accepts]: Start accepts. Automaton has 28551 states and 83510 transitions. Word has length 86 [2023-11-23 20:36:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:47,483 INFO L495 AbstractCegarLoop]: Abstraction has 28551 states and 83510 transitions. [2023-11-23 20:36:47,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.5901639344262297) internal successors, (158), 61 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 28551 states and 83510 transitions. [2023-11-23 20:36:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-23 20:36:47,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:47,488 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:47,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:47,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 20:36:47,689 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-11-23 20:36:47,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:47,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2033891358, now seen corresponding path program 2 times [2023-11-23 20:36:47,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:47,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826819387] [2023-11-23 20:36:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:47,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:48,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:36:48,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701971114] [2023-11-23 20:36:48,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:36:48,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:48,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:48,156 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:48,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25331a21-e0aa-4dad-b8fa-de4adbe307bf/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 20:36:49,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 20:36:49,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:49,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:49,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2206 trivial. 0 not checked. [2023-11-23 20:36:49,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:49,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:49,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826819387] [2023-11-23 20:36:49,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:36:49,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701971114] [2023-11-23 20:36:49,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701971114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:49,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:49,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:49,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399411602] [2023-11-23 20:36:49,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:49,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:49,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:49,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:49,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:49,453 INFO L87 Difference]: Start difference. First operand 28551 states and 83510 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)