./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX --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 7921702b8cbecd5225031321150d70ea7b40d7d08ee6ac9909ff47d4f7b99139 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:14:02,603 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:14:02,713 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:14:02,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:14:02,718 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:14:02,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:14:02,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:14:02,746 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:14:02,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:14:02,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:14:02,747 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:14:02,748 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:14:02,749 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:14:02,749 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:14:02,750 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:14:02,750 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:14:02,751 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:14:02,751 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:14:02,752 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:14:02,753 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:14:02,753 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:14:02,754 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:14:02,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:14:02,755 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:14:02,756 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:14:02,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:14:02,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:14:02,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:14:02,758 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:14:02,758 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:14:02,759 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:14:02,759 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:14:02,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:14:02,775 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:14:02,776 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:14:02,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:14:02,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:02,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:14:02,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:14:02,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:14:02,778 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:14:02,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:14:02,779 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:14:02,779 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:14:02,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:14:02,780 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_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7921702b8cbecd5225031321150d70ea7b40d7d08ee6ac9909ff47d4f7b99139 [2023-11-12 00:14:03,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:14:03,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:14:03,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:14:03,066 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:14:03,067 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:14:03,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c [2023-11-12 00:14:06,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:14:06,414 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:14:06,414 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c [2023-11-12 00:14:06,423 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/data/0d249a1fc/33f42a5d3abb431aa28aae5239921d85/FLAG01cfa4bdf [2023-11-12 00:14:06,440 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/data/0d249a1fc/33f42a5d3abb431aa28aae5239921d85 [2023-11-12 00:14:06,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:14:06,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:14:06,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:06,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:14:06,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:14:06,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b889ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06, skipping insertion in model container [2023-11-12 00:14:06,459 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,482 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:14:06,662 WARN L240 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_1b2d02a8-625e-419f-8b84-e420928bf023/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c[458,471] [2023-11-12 00:14:06,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:06,705 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:14:06,720 WARN L240 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_1b2d02a8-625e-419f-8b84-e420928bf023/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c[458,471] [2023-11-12 00:14:06,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:06,762 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:14:06,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06 WrapperNode [2023-11-12 00:14:06,763 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:06,764 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:06,765 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:14:06,765 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:14:06,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,799 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-11-12 00:14:06,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:06,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:14:06,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:14:06,802 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:14:06,813 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,832 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,836 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,838 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:14:06,843 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:14:06,843 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:14:06,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:14:06,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (1/1) ... [2023-11-12 00:14:06,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:06,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:06,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:14:06,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:14:06,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:14:06,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:14:06,945 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:14:06,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:14:06,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:14:06,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:14:06,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:14:06,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:14:07,009 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:14:07,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:14:07,165 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:14:07,193 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:14:07,194 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:14:07,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:07 BoogieIcfgContainer [2023-11-12 00:14:07,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:14:07,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:14:07,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:14:07,204 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:14:07,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:14:06" (1/3) ... [2023-11-12 00:14:07,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363d228c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:07, skipping insertion in model container [2023-11-12 00:14:07,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:06" (2/3) ... [2023-11-12 00:14:07,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363d228c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:07, skipping insertion in model container [2023-11-12 00:14:07,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:07" (3/3) ... [2023-11-12 00:14:07,208 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound20.c [2023-11-12 00:14:07,229 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:14:07,229 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:14:07,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:14:07,287 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@648b9737, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:14:07,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:14:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:14:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:14:07,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:07,302 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:07,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:07,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:07,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2113922188, now seen corresponding path program 1 times [2023-11-12 00:14:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:07,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212269563] [2023-11-12 00:14:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:07,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:07,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:07,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212269563] [2023-11-12 00:14:07,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 00:14:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276021344] [2023-11-12 00:14:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:07,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:07,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:07,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:07,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:14:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:07,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:14:07,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:07,733 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276021344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:07,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:07,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:14:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754818942] [2023-11-12 00:14:07,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:07,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:14:07,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:14:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:14:07,797 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 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) [2023-11-12 00:14:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:07,851 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2023-11-12 00:14:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:14:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 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 13 [2023-11-12 00:14:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:07,864 INFO L225 Difference]: With dead ends: 32 [2023-11-12 00:14:07,864 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 00:14:07,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:14:07,875 INFO L413 NwaCegarLoop]: 19 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, 19 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 [2023-11-12 00:14:07,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:14:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 00:14:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-12 00:14:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:14:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-12 00:14:07,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2023-11-12 00:14:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:07,931 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-12 00:14:07,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 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) [2023-11-12 00:14:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-12 00:14:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:14:07,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:07,936 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:07,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:14:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:14:08,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:08,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:08,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2066763035, now seen corresponding path program 1 times [2023-11-12 00:14:08,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:08,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988964698] [2023-11-12 00:14:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:08,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:08,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:08,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533376763] [2023-11-12 00:14:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:08,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:08,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:08,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:08,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:14:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:08,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:14:08,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:14:08,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:08,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:08,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988964698] [2023-11-12 00:14:08,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:08,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533376763] [2023-11-12 00:14:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533376763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:08,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:08,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:14:08,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699620965] [2023-11-12 00:14:08,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:08,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:14:08,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:08,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:14:08,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:14:08,405 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 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) [2023-11-12 00:14:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:08,496 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-12 00:14:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:14:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 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 13 [2023-11-12 00:14:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:08,499 INFO L225 Difference]: With dead ends: 28 [2023-11-12 00:14:08,499 INFO L226 Difference]: Without dead ends: 24 [2023-11-12 00:14:08,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:14:08,518 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:08,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:14:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-12 00:14:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-12 00:14:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:14:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-12 00:14:08,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2023-11-12 00:14:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:08,530 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-12 00:14:08,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 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) [2023-11-12 00:14:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-12 00:14:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:14:08,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:08,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:08,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:08,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:14:08,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:08,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1985624712, now seen corresponding path program 1 times [2023-11-12 00:14:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:08,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069393965] [2023-11-12 00:14:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:08,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:08,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:08,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536044092] [2023-11-12 00:14:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:08,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:08,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:08,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:08,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:14:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:08,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 00:14:08,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:09,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:09,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069393965] [2023-11-12 00:14:09,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:09,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536044092] [2023-11-12 00:14:09,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536044092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:09,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74952505] [2023-11-12 00:14:09,332 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:14:09,333 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:09,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:09,344 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:09,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:10,408 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-11-12 00:14:10,479 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 55 for LOIs [2023-11-12 00:14:10,521 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:11,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '375#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| Int)) (and (not (= (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| 30)) (+ (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) 10) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) 15) (* 6 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|))))) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|))))' at error location [2023-11-12 00:14:11,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:11,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:11,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-11-12 00:14:11,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928581013] [2023-11-12 00:14:11,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:11,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:14:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:14:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:14:11,515 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:14:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:11,682 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-11-12 00:14:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:14:11,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2023-11-12 00:14:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:11,684 INFO L225 Difference]: With dead ends: 35 [2023-11-12 00:14:11,684 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 00:14:11,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:14:11,686 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:11,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 72 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:14:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 00:14:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-11-12 00:14:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:14:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-12 00:14:11,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2023-11-12 00:14:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:11,708 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-12 00:14:11,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:14:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-12 00:14:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 00:14:11,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:11,710 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:11,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:11,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:11,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:11,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1002189902, now seen corresponding path program 1 times [2023-11-12 00:14:11,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:11,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286494059] [2023-11-12 00:14:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:11,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:11,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:11,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524798185] [2023-11-12 00:14:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:11,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:11,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:11,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:11,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:14:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:11,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 00:14:12,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:14:12,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:16,233 WARN L854 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2023-11-12 00:14:34,389 WARN L876 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 10)) 30) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-11-12 00:14:52,630 WARN L876 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 10)) 30) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-11-12 00:15:04,791 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ |c_ULTIMATE.start_main_~y~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2023-11-12 00:15:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 4 not checked. [2023-11-12 00:15:08,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:08,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286494059] [2023-11-12 00:15:08,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:15:08,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524798185] [2023-11-12 00:15:08,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524798185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:08,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836134240] [2023-11-12 00:15:08,855 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:15:08,855 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:08,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:08,856 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:08,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:09,528 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 00:15:09,534 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 55 for LOIs [2023-11-12 00:15:09,565 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:10,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '674#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:15:10,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:10,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:15:10,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2023-11-12 00:15:10,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563910038] [2023-11-12 00:15:10,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:10,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:15:10,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:10,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:15:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=437, Unknown=4, NotChecked=180, Total=702 [2023-11-12 00:15:10,219 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-12 00:15:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:10,447 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-11-12 00:15:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:15:10,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 31 [2023-11-12 00:15:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:10,449 INFO L225 Difference]: With dead ends: 35 [2023-11-12 00:15:10,449 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 00:15:10,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=101, Invalid=561, Unknown=4, NotChecked=204, Total=870 [2023-11-12 00:15:10,452 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:10,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 99 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2023-11-12 00:15:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 00:15:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-12 00:15:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:15:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-12 00:15:10,462 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 31 [2023-11-12 00:15:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:10,463 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-12 00:15:10,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-12 00:15:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-12 00:15:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 00:15:10,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:10,465 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:10,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:10,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:10,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:15:10,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:10,676 INFO L85 PathProgramCache]: Analyzing trace with hash -180873249, now seen corresponding path program 2 times [2023-11-12 00:15:10,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:10,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250021476] [2023-11-12 00:15:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:10,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:10,695 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:15:10,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245452817] [2023-11-12 00:15:10,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:15:10,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:10,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:10,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:10,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b2d02a8-625e-419f-8b84-e420928bf023/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:15:10,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:15:10,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:10,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 00:15:10,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 00:15:10,951 INFO L327 TraceCheckSpWp]: Computing backward predicates...