./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2 --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 c6b05ef27bc57afa4e7776361d8c320f2c4d1efbfc422ad92c7a9c3c2e549e04 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:28:47,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:28:47,127 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:28:47,132 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:28:47,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:28:47,156 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:28:47,156 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:28:47,157 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:28:47,157 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:28:47,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:28:47,158 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:28:47,158 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:28:47,159 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:28:47,159 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:28:47,160 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:28:47,160 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:28:47,160 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:28:47,161 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:28:47,161 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:28:47,162 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:28:47,162 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:28:47,163 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:28:47,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:28:47,164 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:28:47,164 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:28:47,165 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:28:47,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:28:47,166 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:28:47,166 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:28:47,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:28:47,167 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:28:47,167 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:28:47,167 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:28:47,167 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:28:47,168 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:28:47,168 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:28:47,168 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:28:47,169 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:28:47,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:47,169 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:28:47,170 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:28:47,170 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:28:47,175 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:28:47,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:28:47,176 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:28:47,176 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:28:47,176 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:28:47,177 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_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6b05ef27bc57afa4e7776361d8c320f2c4d1efbfc422ad92c7a9c3c2e549e04 [2024-11-02 12:28:47,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:28:47,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:28:47,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:28:47,525 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:28:47,525 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:28:47,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_valuebound10.c Unable to find full path for "g++" [2024-11-02 12:28:49,678 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:28:49,870 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:28:49,870 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_valuebound10.c [2024-11-02 12:28:49,879 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/data/9ef73e743/ad992837d46e44adbf82b7d4ed4ddeed/FLAG423618fa3 [2024-11-02 12:28:49,899 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/data/9ef73e743/ad992837d46e44adbf82b7d4ed4ddeed [2024-11-02 12:28:49,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:28:49,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:28:49,903 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:49,904 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:28:49,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:28:49,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:49" (1/1) ... [2024-11-02 12:28:49,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393fa97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:49, skipping insertion in model container [2024-11-02 12:28:49,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:49" (1/1) ... [2024-11-02 12:28:49,930 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:28:50,113 WARN L251 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_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_valuebound10.c[535,548] [2024-11-02 12:28:50,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:50,141 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:28:50,154 WARN L251 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_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_valuebound10.c[535,548] [2024-11-02 12:28:50,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:50,180 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:28:50,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50 WrapperNode [2024-11-02 12:28:50,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:50,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:50,182 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:28:50,183 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:28:50,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,218 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2024-11-02 12:28:50,219 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:50,220 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:28:50,220 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:28:50,220 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:28:50,231 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,239 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,246 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,251 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,251 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,253 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:28:50,253 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:28:50,254 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:28:50,254 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:28:50,255 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (1/1) ... [2024-11-02 12:28:50,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:50,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:50,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:28:50,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:28:50,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:28:50,319 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-02 12:28:50,319 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-02 12:28:50,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:28:50,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:28:50,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:28:50,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 12:28:50,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 12:28:50,373 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:28:50,375 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:28:50,536 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-02 12:28:50,536 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:28:50,577 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:28:50,577 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:28:50,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:50 BoogieIcfgContainer [2024-11-02 12:28:50,578 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:28:50,581 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:28:50,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:28:50,586 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:28:50,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:28:49" (1/3) ... [2024-11-02 12:28:50,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51025ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:50, skipping insertion in model container [2024-11-02 12:28:50,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:50" (2/3) ... [2024-11-02 12:28:50,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51025ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:50, skipping insertion in model container [2024-11-02 12:28:50,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:50" (3/3) ... [2024-11-02 12:28:50,592 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound10.c [2024-11-02 12:28:50,616 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:28:50,616 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:28:50,699 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:28:50,712 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;@2428ca54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:28:50,712 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:28:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-02 12:28:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-02 12:28:50,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:50,732 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:50,733 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:50,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1333631252, now seen corresponding path program 1 times [2024-11-02 12:28:50,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:50,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846021226] [2024-11-02 12:28:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:50,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:28:50,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432909693] [2024-11-02 12:28:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:50,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:50,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:50,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:28:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:51,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:28:51,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:28:51,333 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:51,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:51,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846021226] [2024-11-02 12:28:51,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:28:51,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432909693] [2024-11-02 12:28:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432909693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:51,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:51,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:28:51,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348700799] [2024-11-02 12:28:51,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:51,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:28:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:51,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:28:51,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:28:51,368 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-02 12:28:53,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-02 12:28:55,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-02 12:28:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:55,561 INFO L93 Difference]: Finished difference Result 58 states and 95 transitions. [2024-11-02 12:28:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:28:55,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2024-11-02 12:28:55,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:55,579 INFO L225 Difference]: With dead ends: 58 [2024-11-02 12:28:55,580 INFO L226 Difference]: Without dead ends: 38 [2024-11-02 12:28:55,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:28:55,588 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:55,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-02 12:28:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-02 12:28:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-02 12:28:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-02 12:28:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2024-11-02 12:28:55,678 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 20 [2024-11-02 12:28:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:55,680 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2024-11-02 12:28:55,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-02 12:28:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2024-11-02 12:28:55,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 12:28:55,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:55,684 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:55,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:28:55,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-02 12:28:55,886 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:55,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1820027827, now seen corresponding path program 1 times [2024-11-02 12:28:55,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:55,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201850465] [2024-11-02 12:28:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:28:56,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201850465] [2024-11-02 12:28:56,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201850465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:56,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003813246] [2024-11-02 12:28:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:56,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:56,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:56,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:56,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:28:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:56,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:28:56,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:28:56,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:28:57,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003813246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:57,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944192679] [2024-11-02 12:28:57,190 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-02 12:28:57,191 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:57,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:57,202 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:57,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:58,362 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 93 for LOIs [2024-11-02 12:28:58,682 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-02 12:28:58,683 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:29:05,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [944192679] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:05,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:29:05,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 8, 8] total 24 [2024-11-02 12:29:05,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669428661] [2024-11-02 12:29:05,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:05,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 12:29:05,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:05,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 12:29:05,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=449, Unknown=2, NotChecked=0, Total=552 [2024-11-02 12:29:05,977 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 15 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-02 12:29:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:06,907 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2024-11-02 12:29:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:29:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 26 [2024-11-02 12:29:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:06,909 INFO L225 Difference]: With dead ends: 45 [2024-11-02 12:29:06,909 INFO L226 Difference]: Without dead ends: 38 [2024-11-02 12:29:06,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=101, Invalid=449, Unknown=2, NotChecked=0, Total=552 [2024-11-02 12:29:06,913 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:06,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 62 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 12:29:06,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-02 12:29:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-02 12:29:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-02 12:29:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2024-11-02 12:29:06,946 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 26 [2024-11-02 12:29:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:06,948 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2024-11-02 12:29:06,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-02 12:29:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2024-11-02 12:29:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-02 12:29:06,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:06,951 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:29:06,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:29:07,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:07,153 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:07,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:07,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1140063161, now seen corresponding path program 1 times [2024-11-02 12:29:07,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:07,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726809640] [2024-11-02 12:29:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:07,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:29:07,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280662008] [2024-11-02 12:29:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:07,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:07,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:07,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:07,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:29:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:07,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 12:29:07,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 12:29:07,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 12:29:07,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726809640] [2024-11-02 12:29:07,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:29:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280662008] [2024-11-02 12:29:07,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280662008] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:29:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154720418] [2024-11-02 12:29:07,952 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-02 12:29:07,953 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:29:07,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:29:07,953 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:29:07,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:29:08,978 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 91 for LOIs [2024-11-02 12:29:09,117 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-02 12:29:09,119 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:29:14,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '763#(and (exists ((|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_20| Int)) (and (not (= (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_18|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_20| 2)) (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_16| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_18|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_38| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_20| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_20|)))) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_38|) (<= 1 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_20|) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_38| 10))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-02 12:29:14,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:29:14,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:29:14,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2024-11-02 12:29:14,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878954788] [2024-11-02 12:29:14,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 12:29:14,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 12:29:14,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:14,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 12:29:14,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=547, Unknown=1, NotChecked=0, Total=650 [2024-11-02 12:29:14,748 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 12:29:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:15,246 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2024-11-02 12:29:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:29:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 34 [2024-11-02 12:29:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:15,249 INFO L225 Difference]: With dead ends: 53 [2024-11-02 12:29:15,249 INFO L226 Difference]: Without dead ends: 49 [2024-11-02 12:29:15,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=109, Invalid=592, Unknown=1, NotChecked=0, Total=702 [2024-11-02 12:29:15,251 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:15,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 145 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:29:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-02 12:29:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2024-11-02 12:29:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-02 12:29:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2024-11-02 12:29:15,273 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 34 [2024-11-02 12:29:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:15,273 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2024-11-02 12:29:15,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 12:29:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2024-11-02 12:29:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:29:15,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:15,275 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:29:15,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:29:15,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:15,476 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:15,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:15,477 INFO L85 PathProgramCache]: Analyzing trace with hash 607321595, now seen corresponding path program 1 times [2024-11-02 12:29:15,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:15,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934004606] [2024-11-02 12:29:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:15,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-02 12:29:16,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:16,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934004606] [2024-11-02 12:29:16,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934004606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:16,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749038373] [2024-11-02 12:29:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:16,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:16,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:16,005 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:16,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:29:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:16,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:29:16,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-02 12:29:16,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:18,310 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~A~0#1| Int) (|ULTIMATE.start_main_~v~0#1| Int) (|ULTIMATE.start_main_~u~0#1| Int)) (let ((.cse1 (* |ULTIMATE.start_main_~A~0#1| 4)) (.cse2 (* |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~v~0#1|)) (.cse3 (* 2 |ULTIMATE.start_main_~u~0#1|)) (.cse0 (+ (* 2 |ULTIMATE.start_main_~v~0#1|) (* |ULTIMATE.start_main_~u~0#1| |ULTIMATE.start_main_~u~0#1|)))) (or (not (= .cse0 (+ .cse1 (* |c_ULTIMATE.start_main_~r~0#1| 4) .cse2 .cse3))) (= (+ .cse1 .cse2 .cse3) .cse0)))) is different from false [2024-11-02 12:29:18,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749038373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:18,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592052236] [2024-11-02 12:29:18,316 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-02 12:29:18,316 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:29:18,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:29:18,317 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:29:18,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:29:20,811 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-02 12:29:20,824 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-02 12:29:20,826 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:29:22,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1118#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-02 12:29:22,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:29:22,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:29:22,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2024-11-02 12:29:22,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784680835] [2024-11-02 12:29:22,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 12:29:22,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-02 12:29:22,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:22,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-02 12:29:22,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=555, Unknown=1, NotChecked=48, Total=702 [2024-11-02 12:29:22,917 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-02 12:29:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:23,324 INFO L93 Difference]: Finished difference Result 91 states and 117 transitions. [2024-11-02 12:29:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:29:23,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 54 [2024-11-02 12:29:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:23,326 INFO L225 Difference]: With dead ends: 91 [2024-11-02 12:29:23,327 INFO L226 Difference]: Without dead ends: 0 [2024-11-02 12:29:23,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2024-11-02 12:29:23,329 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:23,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 169 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:29:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-02 12:29:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-02 12:29:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-02 12:29:23,332 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2024-11-02 12:29:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:23,332 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-02 12:29:23,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-02 12:29:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-02 12:29:23,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-02 12:29:23,336 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-02 12:29:23,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 12:29:23,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee17ca74-825a-4bae-bbbc-c5bfde0336dd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:23,541 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-02 12:29:23,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.