./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 376367d14f0ef5deff3321a7267050cf9f2383eb99d0a19dad6a556c0772ff28 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:35:43,726 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:35:43,817 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:35:43,824 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:35:43,825 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:35:43,857 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:35:43,858 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:35:43,858 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:35:43,859 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:35:43,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:35:43,863 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:35:43,863 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:35:43,864 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:35:43,865 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:35:43,865 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:35:43,866 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:35:43,866 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:35:43,866 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:35:43,866 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:35:43,867 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:35:43,867 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:35:43,868 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:35:43,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:35:43,869 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:35:43,869 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:35:43,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:35:43,869 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:35:43,870 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:35:43,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:35:43,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:35:43,880 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:35:43,880 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:35:43,880 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:35:43,881 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:35:43,881 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:35:43,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:35:43,882 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:35:43,882 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:35:43,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:35:43,883 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:35:43,883 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:35:43,883 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:35:43,884 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:35:43,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:35:43,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:35:43,885 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:35:43,885 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:35:43,885 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_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 376367d14f0ef5deff3321a7267050cf9f2383eb99d0a19dad6a556c0772ff28 [2024-11-09 04:35:44,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:35:44,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:35:44,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:35:44,171 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:35:44,173 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:35:44,174 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c Unable to find full path for "g++" [2024-11-09 04:35:46,078 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:35:46,297 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:35:46,297 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2024-11-09 04:35:46,306 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/data/c6f29d874/54373673275244acaab7df7f5c941e23/FLAG2ae0cf27d [2024-11-09 04:35:46,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/data/c6f29d874/54373673275244acaab7df7f5c941e23 [2024-11-09 04:35:46,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:35:46,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:35:46,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:35:46,646 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:35:46,653 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:35:46,655 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:46,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ecf637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46, skipping insertion in model container [2024-11-09 04:35:46,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:46,678 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:35:46,856 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2024-11-09 04:35:46,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:35:46,916 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:35:46,933 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2024-11-09 04:35:46,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:35:46,995 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:35:46,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46 WrapperNode [2024-11-09 04:35:46,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:35:46,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:35:46,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:35:46,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:35:47,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,021 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,047 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2024-11-09 04:35:47,047 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:35:47,048 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:35:47,048 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:35:47,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:35:47,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,065 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,075 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,076 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:35:47,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:35:47,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:35:47,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:35:47,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (1/1) ... [2024-11-09 04:35:47,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:35:47,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:47,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:35:47,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:35:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:35:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:35:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:35:47,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:35:47,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 04:35:47,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 04:35:47,240 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:35:47,243 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:35:47,541 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 04:35:47,541 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:35:47,618 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:35:47,618 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 04:35:47,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:35:47 BoogieIcfgContainer [2024-11-09 04:35:47,619 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:35:47,622 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:35:47,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:35:47,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:35:47,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:35:46" (1/3) ... [2024-11-09 04:35:47,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ea8cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:35:47, skipping insertion in model container [2024-11-09 04:35:47,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:35:46" (2/3) ... [2024-11-09 04:35:47,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ea8cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:35:47, skipping insertion in model container [2024-11-09 04:35:47,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:35:47" (3/3) ... [2024-11-09 04:35:47,629 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound100.c [2024-11-09 04:35:47,659 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:35:47,660 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:35:47,741 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:35:47,749 INFO L333 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, 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;@68fd1646, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:35:47,750 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:35:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 04:35:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:35:47,762 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:47,763 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:47,764 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:47,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1811087078, now seen corresponding path program 1 times [2024-11-09 04:35:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:47,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540051258] [2024-11-09 04:35:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:47,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:47,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540051258] [2024-11-09 04:35:47,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540051258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:47,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:35:47,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:35:47,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61568351] [2024-11-09 04:35:47,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:47,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 04:35:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:47,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 04:35:47,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:35:47,996 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:48,035 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2024-11-09 04:35:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 04:35:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:35:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:48,046 INFO L225 Difference]: With dead ends: 44 [2024-11-09 04:35:48,047 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 04:35:48,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:35:48,054 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:48,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:35:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 04:35:48,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-09 04:35:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 04:35:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2024-11-09 04:35:48,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2024-11-09 04:35:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:48,112 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2024-11-09 04:35:48,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2024-11-09 04:35:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:35:48,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:48,114 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:48,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:35:48,115 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:48,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1445796720, now seen corresponding path program 1 times [2024-11-09 04:35:48,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:48,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277721613] [2024-11-09 04:35:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:48,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:48,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:48,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277721613] [2024-11-09 04:35:48,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277721613] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:48,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:35:48,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:35:48,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128518066] [2024-11-09 04:35:48,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:48,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:35:48,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:35:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:35:48,266 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:48,325 INFO L93 Difference]: Finished difference Result 42 states and 63 transitions. [2024-11-09 04:35:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:35:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 04:35:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:48,331 INFO L225 Difference]: With dead ends: 42 [2024-11-09 04:35:48,331 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 04:35:48,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:35:48,337 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:48,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:35:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 04:35:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 04:35:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 04:35:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2024-11-09 04:35:48,350 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 9 [2024-11-09 04:35:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:48,351 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2024-11-09 04:35:48,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2024-11-09 04:35:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 04:35:48,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:48,353 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:48,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:35:48,355 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:48,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1878535169, now seen corresponding path program 1 times [2024-11-09 04:35:48,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:48,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292922991] [2024-11-09 04:35:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:48,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:48,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:48,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292922991] [2024-11-09 04:35:48,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292922991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:48,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:35:48,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:35:48,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445073042] [2024-11-09 04:35:48,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:48,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:35:48,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:48,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:35:48,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:35:48,641 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:48,692 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2024-11-09 04:35:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:35:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 04:35:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:48,694 INFO L225 Difference]: With dead ends: 37 [2024-11-09 04:35:48,694 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 04:35:48,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:35:48,696 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:48,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:35:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 04:35:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-11-09 04:35:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 04:35:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2024-11-09 04:35:48,705 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 10 [2024-11-09 04:35:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:48,705 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2024-11-09 04:35:48,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2024-11-09 04:35:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 04:35:48,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:48,706 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:48,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:35:48,709 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:48,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1877045619, now seen corresponding path program 1 times [2024-11-09 04:35:48,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:48,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582940049] [2024-11-09 04:35:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:48,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:49,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:49,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582940049] [2024-11-09 04:35:49,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582940049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:49,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:35:49,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:35:49,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922483466] [2024-11-09 04:35:49,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:49,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:35:49,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:49,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:35:49,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:35:49,381 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:51,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:35:53,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:35:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:53,985 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2024-11-09 04:35:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:35:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 04:35:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:53,988 INFO L225 Difference]: With dead ends: 40 [2024-11-09 04:35:53,988 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 04:35:53,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:35:53,990 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:53,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 132 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2024-11-09 04:35:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 04:35:54,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2024-11-09 04:35:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 04:35:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2024-11-09 04:35:54,002 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 10 [2024-11-09 04:35:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:54,003 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2024-11-09 04:35:54,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2024-11-09 04:35:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 04:35:54,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:54,004 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:54,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:35:54,005 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:54,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:54,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1471671004, now seen corresponding path program 1 times [2024-11-09 04:35:54,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:54,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393957339] [2024-11-09 04:35:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:54,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:54,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:54,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393957339] [2024-11-09 04:35:54,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393957339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:54,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531907210] [2024-11-09 04:35:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:54,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:54,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:54,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:35:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:54,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:35:54,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:54,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:54,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531907210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:54,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663126469] [2024-11-09 04:35:54,303 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 04:35:54,303 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:54,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:54,313 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:54,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:54,768 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 04:35:54,773 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:54,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [663126469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:54,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:35:54,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 4, 4] total 17 [2024-11-09 04:35:54,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927741345] [2024-11-09 04:35:54,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:54,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:35:54,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:54,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:35:54,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-09 04:35:54,983 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:55,312 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2024-11-09 04:35:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:35:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 04:35:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:55,315 INFO L225 Difference]: With dead ends: 71 [2024-11-09 04:35:55,316 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 04:35:55,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-09 04:35:55,319 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:55,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 81 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:35:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 04:35:55,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2024-11-09 04:35:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.25) internal successors, (30), 27 states have internal predecessors, (30), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 04:35:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-11-09 04:35:55,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 12 [2024-11-09 04:35:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:55,343 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-11-09 04:35:55,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:55,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-11-09 04:35:55,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:35:55,345 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:55,346 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:55,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:35:55,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:55,547 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:55,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2125721397, now seen corresponding path program 1 times [2024-11-09 04:35:55,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:55,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228544303] [2024-11-09 04:35:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:55,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:55,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:55,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228544303] [2024-11-09 04:35:55,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228544303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:55,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512261986] [2024-11-09 04:35:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:55,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:55,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:55,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:55,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:35:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:55,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:35:55,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:55,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:55,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512261986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511723188] [2024-11-09 04:35:55,862 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 04:35:55,864 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:55,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:55,865 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:55,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:56,098 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2024-11-09 04:35:56,111 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:56,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [511723188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:56,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:35:56,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 5, 5] total 19 [2024-11-09 04:35:56,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636626946] [2024-11-09 04:35:56,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:56,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:35:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:35:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:35:56,487 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:57,672 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2024-11-09 04:35:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:35:57,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:35:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:57,674 INFO L225 Difference]: With dead ends: 61 [2024-11-09 04:35:57,674 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 04:35:57,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:35:57,675 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:57,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 100 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 04:35:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 04:35:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2024-11-09 04:35:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 04:35:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-11-09 04:35:57,686 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 13 [2024-11-09 04:35:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:57,691 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-11-09 04:35:57,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:35:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-11-09 04:35:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:35:57,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:57,692 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:57,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:35:57,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:57,893 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:57,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:57,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2124231847, now seen corresponding path program 1 times [2024-11-09 04:35:57,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:57,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941333954] [2024-11-09 04:35:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:57,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:35:58,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:58,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941333954] [2024-11-09 04:35:58,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941333954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:58,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:35:58,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:35:58,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994886798] [2024-11-09 04:35:58,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:58,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:35:58,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:58,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:35:58,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:35:58,142 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:36:00,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 04:36:02,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:02,635 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2024-11-09 04:36:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:36:02,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:36:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:02,638 INFO L225 Difference]: With dead ends: 60 [2024-11-09 04:36:02,638 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 04:36:02,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:36:02,639 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:02,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 137 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-11-09 04:36:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 04:36:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2024-11-09 04:36:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 04:36:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-11-09 04:36:02,664 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 13 [2024-11-09 04:36:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:02,668 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-11-09 04:36:02,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:36:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-11-09 04:36:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 04:36:02,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:02,669 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:02,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 04:36:02,670 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:36:02,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:02,670 INFO L85 PathProgramCache]: Analyzing trace with hash 681752818, now seen corresponding path program 1 times [2024-11-09 04:36:02,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:02,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214751938] [2024-11-09 04:36:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:02,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:36:02,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953786805] [2024-11-09 04:36:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:02,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:02,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:02,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:02,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:36:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:02,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:36:02,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:36:02,954 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:36:02,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214751938] [2024-11-09 04:36:02,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:36:02,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953786805] [2024-11-09 04:36:02,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953786805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:36:02,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:36:02,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:36:02,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922796753] [2024-11-09 04:36:02,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:36:02,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:36:02,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:36:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:36:02,959 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:36:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:03,140 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2024-11-09 04:36:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:36:03,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-09 04:36:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:03,141 INFO L225 Difference]: With dead ends: 75 [2024-11-09 04:36:03,142 INFO L226 Difference]: Without dead ends: 57 [2024-11-09 04:36:03,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:36:03,143 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:03,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 82 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:36:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-09 04:36:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-09 04:36:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 36 states have internal predecessors, (40), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-09 04:36:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2024-11-09 04:36:03,161 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 15 [2024-11-09 04:36:03,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:03,161 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2024-11-09 04:36:03,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:36:03,161 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2024-11-09 04:36:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 04:36:03,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:03,162 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:03,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:36:03,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 04:36:03,363 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:36:03,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1842825019, now seen corresponding path program 1 times [2024-11-09 04:36:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:03,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950182977] [2024-11-09 04:36:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:36:03,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:03,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950182977] [2024-11-09 04:36:03,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950182977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:03,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836379244] [2024-11-09 04:36:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:03,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:03,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:03,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:03,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:36:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:03,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:36:03,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:36:03,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:36:03,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836379244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81827563] [2024-11-09 04:36:03,587 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 04:36:03,587 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:03,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:03,588 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:03,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:03,814 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2024-11-09 04:36:03,825 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:04,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1536#(and (<= 1 |#StackHeapBarrier|) (<= 102 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:36:04,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:04,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:04,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-09 04:36:04,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159076186] [2024-11-09 04:36:04,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:04,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:36:04,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:36:04,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:36:04,149 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:06,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:08,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 04:36:10,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 04:36:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:10,849 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2024-11-09 04:36:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:36:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-11-09 04:36:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:10,851 INFO L225 Difference]: With dead ends: 118 [2024-11-09 04:36:10,851 INFO L226 Difference]: Without dead ends: 104 [2024-11-09 04:36:10,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-11-09 04:36:10,853 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:10,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 163 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2024-11-09 04:36:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-09 04:36:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2024-11-09 04:36:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 62 states have internal predecessors, (69), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-09 04:36:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2024-11-09 04:36:10,883 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 17 [2024-11-09 04:36:10,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:10,883 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2024-11-09 04:36:10,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2024-11-09 04:36:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 04:36:10,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:10,885 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:10,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:36:11,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:11,087 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:36:11,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:11,094 INFO L85 PathProgramCache]: Analyzing trace with hash 739343348, now seen corresponding path program 1 times [2024-11-09 04:36:11,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:11,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123583164] [2024-11-09 04:36:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:11,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:36:11,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123583164] [2024-11-09 04:36:11,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123583164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228094432] [2024-11-09 04:36:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:11,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:11,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:11,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:36:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:11,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:36:11,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:36:11,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:36:11,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228094432] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:11,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860805578] [2024-11-09 04:36:11,390 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 04:36:11,390 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:11,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:11,391 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:11,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:11,614 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2024-11-09 04:36:11,670 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:12,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2009#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_6| Int)) (and (not (= (mod (+ (* |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| 4294967295) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_11|) 4294967296) 0)) (<= (+ (mod |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| 4294967296) 1) (mod |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_6| 4294967296)))) (= ~counter~0 101))' at error location [2024-11-09 04:36:12,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:12,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:12,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-11-09 04:36:12,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139144258] [2024-11-09 04:36:12,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:12,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 04:36:12,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 04:36:12,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-11-09 04:36:12,478 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:13,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:13,114 INFO L93 Difference]: Finished difference Result 182 states and 236 transitions. [2024-11-09 04:36:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:36:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-09 04:36:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:13,116 INFO L225 Difference]: With dead ends: 182 [2024-11-09 04:36:13,116 INFO L226 Difference]: Without dead ends: 155 [2024-11-09 04:36:13,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-11-09 04:36:13,117 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 121 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:13,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 160 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:36:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-09 04:36:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2024-11-09 04:36:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 83 states have (on average 1.216867469879518) internal successors, (101), 92 states have internal predecessors, (101), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-09 04:36:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2024-11-09 04:36:13,149 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 18 [2024-11-09 04:36:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:13,149 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2024-11-09 04:36:13,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2024-11-09 04:36:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 04:36:13,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:13,150 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:13,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:36:13,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:36:13,351 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:36:13,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash 549493670, now seen corresponding path program 1 times [2024-11-09 04:36:13,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:13,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877062573] [2024-11-09 04:36:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:13,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:36:13,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796004361] [2024-11-09 04:36:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:13,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:13,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:13,367 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:13,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:36:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:13,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 04:36:13,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:36:13,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:36:14,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877062573] [2024-11-09 04:36:14,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:36:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796004361] [2024-11-09 04:36:14,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796004361] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:14,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567381678] [2024-11-09 04:36:14,678 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 04:36:14,679 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:14,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:14,679 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:14,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:14,889 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 52 for LOIs [2024-11-09 04:36:15,229 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:18,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2664#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (or (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_14| Int)) (and (<= (mod |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_14| 4294967296) (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_19| 4294967296)) (<= (+ (mod |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_19| 4294967296) 1) (mod |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_14| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_13| Int)) (and (<= (+ (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| 4294967296) 1) (mod |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_13| 4294967296)) (<= (+ (mod |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_18| 4294967296) 1) (mod |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_13| 4294967296)) (not (= (mod (* |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_13|) 4294967296) (mod (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_13|) 4294967296)))))) (<= ~counter~0 100))' at error location [2024-11-09 04:36:18,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:18,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:36:18,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-09 04:36:18,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080529785] [2024-11-09 04:36:18,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:18,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:36:18,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:18,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:36:18,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-09 04:36:18,493 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:36:23,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:25,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:27,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:30,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 04:36:32,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:34,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:36,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:38,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:40,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:42,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:44,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:46,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:48,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:51,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:52,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:54,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:57,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:59,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:36:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:59,414 INFO L93 Difference]: Finished difference Result 176 states and 236 transitions. [2024-11-09 04:36:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:36:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-09 04:36:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:59,416 INFO L225 Difference]: With dead ends: 176 [2024-11-09 04:36:59,416 INFO L226 Difference]: Without dead ends: 167 [2024-11-09 04:36:59,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=65, Invalid=354, Unknown=1, NotChecked=0, Total=420 [2024-11-09 04:36:59,417 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 49 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:59,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 175 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 103 Invalid, 16 Unknown, 0 Unchecked, 38.0s Time] [2024-11-09 04:36:59,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-09 04:36:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2024-11-09 04:36:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 92 states have (on average 1.184782608695652) internal successors, (109), 100 states have internal predecessors, (109), 52 states have call successors, (52), 15 states have call predecessors, (52), 15 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-09 04:36:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 208 transitions. [2024-11-09 04:36:59,465 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 208 transitions. Word has length 18 [2024-11-09 04:36:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:59,465 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 208 transitions. [2024-11-09 04:36:59,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:36:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 208 transitions. [2024-11-09 04:36:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 04:36:59,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:59,467 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:59,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 04:36:59,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 04:36:59,671 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:36:59,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:59,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1700831891, now seen corresponding path program 1 times [2024-11-09 04:36:59,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:59,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389845732] [2024-11-09 04:36:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:59,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:36:59,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013872419] [2024-11-09 04:36:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:59,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:59,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:36:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:59,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:36:59,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:36:59,808 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:36:59,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:59,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389845732] [2024-11-09 04:36:59,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:36:59,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013872419] [2024-11-09 04:36:59,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013872419] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:36:59,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:36:59,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:36:59,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431470803] [2024-11-09 04:36:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:36:59,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:36:59,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:36:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:36:59,810 INFO L87 Difference]: Start difference. First operand 160 states and 208 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:01,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:37:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:01,945 INFO L93 Difference]: Finished difference Result 208 states and 272 transitions. [2024-11-09 04:37:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:37:01,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-09 04:37:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:01,947 INFO L225 Difference]: With dead ends: 208 [2024-11-09 04:37:01,947 INFO L226 Difference]: Without dead ends: 200 [2024-11-09 04:37:01,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:01,949 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:01,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 100 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 04:37:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-09 04:37:01,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2024-11-09 04:37:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 119 states have internal predecessors, (130), 66 states have call successors, (66), 21 states have call predecessors, (66), 20 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2024-11-09 04:37:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 255 transitions. [2024-11-09 04:37:02,001 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 255 transitions. Word has length 20 [2024-11-09 04:37:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:02,001 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 255 transitions. [2024-11-09 04:37:02,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 255 transitions. [2024-11-09 04:37:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 04:37:02,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:02,003 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:02,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:02,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 04:37:02,208 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:02,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1361264626, now seen corresponding path program 2 times [2024-11-09 04:37:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:02,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957001524] [2024-11-09 04:37:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:37:02,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509092207] [2024-11-09 04:37:02,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:37:02,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:02,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:02,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:02,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:37:02,331 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 04:37:02,331 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:37:02,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 04:37:02,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 04:37:02,522 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:38:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 04:38:00,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:38:00,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957001524] [2024-11-09 04:38:00,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:38:00,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509092207] [2024-11-09 04:38:00,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509092207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:38:00,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057086971] [2024-11-09 04:38:00,441 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 04:38:00,441 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:38:00,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:38:00,441 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:38:00,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:38:00,641 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 52 for LOIs [2024-11-09 04:38:00,694 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:38:09,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4117#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_22| Int)) (and (<= (mod |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_22| 4294967296) (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_27| 4294967296)) (<= (+ (mod |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_27| 4294967296) 1) (mod |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_22| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_26| Int)) (and (not (= (mod (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_21|) 4294967296) (mod (* |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_21|) 4294967296))) (<= (+ (mod |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_26| 4294967296) 1) (mod |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_21| 4294967296)) (<= (+ (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_26| 4294967296) 1) (mod |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_21| 4294967296))))) (= |__VERIFIER_assert_#in~cond| 0) (<= ~counter~0 100))' at error location [2024-11-09 04:38:09,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:38:09,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:38:09,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-09 04:38:09,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897261495] [2024-11-09 04:38:09,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:38:09,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 04:38:09,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:38:09,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 04:38:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-11-09 04:38:09,175 INFO L87 Difference]: Start difference. First operand 199 states and 255 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:38:11,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:14,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:16,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:19,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 04:38:21,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:23,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:25,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:27,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 04:38:28,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:31,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:32,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:35,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 04:38:37,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:39,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:41,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:43,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 04:38:45,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:38:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:38:45,559 INFO L93 Difference]: Finished difference Result 231 states and 283 transitions. [2024-11-09 04:38:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:38:45,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-09 04:38:45,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:38:45,564 INFO L225 Difference]: With dead ends: 231 [2024-11-09 04:38:45,564 INFO L226 Difference]: Without dead ends: 185 [2024-11-09 04:38:45,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:38:45,565 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:38:45,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 15 Unknown, 0 Unchecked, 36.3s Time] [2024-11-09 04:38:45,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-09 04:38:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2024-11-09 04:38:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 106 states have (on average 1.1037735849056605) internal successors, (117), 109 states have internal predecessors, (117), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 04:38:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 216 transitions. [2024-11-09 04:38:45,598 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 216 transitions. Word has length 27 [2024-11-09 04:38:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:38:45,598 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 216 transitions. [2024-11-09 04:38:45,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:38:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 216 transitions. [2024-11-09 04:38:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 04:38:45,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:38:45,600 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:38:45,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 04:38:45,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:38:45,801 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:38:45,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:38:45,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1292089680, now seen corresponding path program 1 times [2024-11-09 04:38:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:38:45,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105130021] [2024-11-09 04:38:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:38:45,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:38:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:38:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-09 04:38:47,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:38:47,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105130021] [2024-11-09 04:38:47,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105130021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:38:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090519248] [2024-11-09 04:38:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:38:47,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:38:47,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:38:47,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:38:47,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6717b9b2-7876-4799-8aa2-9cf5f38029da/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:38:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:38:47,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 04:38:47,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:38:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 04:38:48,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:39:02,250 WARN L286 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:39:31,764 WARN L286 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:39:41,849 WARN L286 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:39:54,067 WARN L286 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:40:32,972 WARN L286 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:40:43,847 WARN L286 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:40:53,884 WARN L286 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:41:00,047 WARN L286 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:41:02,059 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~q~0#1| 4294967296))) (or (= .cse0 1) (not (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0)) (let ((.cse2 (div .cse0 4))) (let ((.cse1 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse4 (mod (+ .cse2 |c_ULTIMATE.start_main_~p~0#1|) 4294967296)) (.cse3 (* (mod |c_ULTIMATE.start_main_~p~0#1| 2) 4294967295))) (and (or (< .cse1 (mod (+ .cse2 |c_ULTIMATE.start_main_~p~0#1| .cse3) 4294967296)) (< .cse4 (+ .cse1 1))) (or (< .cse1 .cse4) (< (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse2 4294967295) (* |c_ULTIMATE.start_main_~p~0#1| 4294967295)) 4294967296) (mod (+ |c_ULTIMATE.start_main_~p~0#1| (* .cse2 3) .cse3) 4294967296)))))) (< .cse0 (+ (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296) 1)))) is different from true [2024-11-09 04:41:13,514 WARN L286 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:41:21,559 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:41:31,605 WARN L286 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:41:41,675 WARN L286 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:41:47,738 WARN L286 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:41:59,364 WARN L286 SmtUtils]: Spent 7.24s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:42:13,466 WARN L286 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:42:22,576 WARN L286 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:42:32,665 WARN L286 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:42:44,745 WARN L286 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:42:52,795 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:43:49,469 WARN L286 SmtUtils]: Spent 39.55s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:44:05,204 WARN L286 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:44:11,396 WARN L286 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:44:13,631 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~q~0#1| 1073741824))) (or (let ((.cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse3 (mod (+ .cse1 |c_ULTIMATE.start_main_~p~0#1|) 4294967296)) (.cse2 (* (mod |c_ULTIMATE.start_main_~p~0#1| 2) 4294967295))) (and (or (< .cse0 (mod (+ .cse1 |c_ULTIMATE.start_main_~p~0#1| .cse2) 4294967296)) (< .cse3 (+ .cse0 1))) (or (< .cse0 .cse3) (< (mod (+ (* .cse1 4294967295) |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~p~0#1| 4294967295)) 4294967296) (mod (+ (* .cse1 3) |c_ULTIMATE.start_main_~p~0#1| .cse2) 4294967296))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 16 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|)) 4294967296) 0)) (< (* .cse1 4) (+ (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296) 1)))) is different from true [2024-11-09 04:44:32,118 WARN L286 SmtUtils]: Spent 12.08s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:44:46,216 WARN L286 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:44:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 4 refuted. 3 times theorem prover too weak. 45 trivial. 3 not checked. [2024-11-09 04:44:48,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090519248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:44:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824815975] [2024-11-09 04:44:48,448 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:44:48,448 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:44:48,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:44:48,449 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:44:48,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:44:58,495 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2024-11-09 04:44:58,544 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:49:50,719 WARN L286 SmtUtils]: Spent 4.66m on a formula simplification. DAG size of input: 140 DAG size of output: 131 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)