./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh --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 ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:16:33,091 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:16:33,178 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:16:33,183 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:16:33,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:16:33,206 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:16:33,206 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:16:33,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:16:33,208 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:16:33,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:16:33,209 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:16:33,209 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:16:33,210 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:16:33,210 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:16:33,211 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:16:33,211 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:16:33,212 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:16:33,212 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:16:33,213 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:16:33,214 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:16:33,214 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:16:33,215 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:16:33,216 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:16:33,216 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:16:33,217 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:16:33,217 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:16:33,217 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:16:33,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:16:33,218 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:16:33,219 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:16:33,219 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:16:33,220 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:16:33,220 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:16:33,220 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:16:33,220 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:16:33,221 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:16:33,221 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:16:33,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:16:33,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:16:33,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:16:33,222 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:16:33,222 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:16:33,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:16:33,222 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:16:33,222 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:16:33,223 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:16:33,223 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:16:33,223 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_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 [2023-12-02 13:16:33,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:16:33,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:16:33,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:16:33,493 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:16:33,493 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:16:33,494 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:16:36,221 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:16:36,431 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:16:36,431 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:16:36,443 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/data/631036182/1919b3a6667c41b88a7d1c95441e572a/FLAG49d6ddc29 [2023-12-02 13:16:36,457 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/data/631036182/1919b3a6667c41b88a7d1c95441e572a [2023-12-02 13:16:36,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:16:36,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:16:36,463 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:16:36,463 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:16:36,468 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:16:36,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a4b3969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36, skipping insertion in model container [2023-12-02 13:16:36,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,516 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:16:36,732 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_86d48611-7676-4a36-8c13-5ad202accf44/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2023-12-02 13:16:36,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:16:36,750 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:16:36,806 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_86d48611-7676-4a36-8c13-5ad202accf44/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2023-12-02 13:16:36,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:16:36,824 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:16:36,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36 WrapperNode [2023-12-02 13:16:36,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:16:36,826 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:16:36,826 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:16:36,826 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:16:36,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,846 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,882 INFO L138 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 371 [2023-12-02 13:16:36,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:16:36,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:16:36,883 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:16:36,884 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:16:36,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,909 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,919 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,922 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,925 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:16:36,926 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:16:36,926 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:16:36,926 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:16:36,927 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (1/1) ... [2023-12-02 13:16:36,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:16:36,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:16:36,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:16:36,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:16:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:16:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:16:36,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:16:37,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:16:37,110 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:16:37,112 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:16:37,511 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:16:38,163 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:16:38,164 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:16:38,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:16:38 BoogieIcfgContainer [2023-12-02 13:16:38,166 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:16:38,169 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:16:38,169 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:16:38,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:16:38,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:16:36" (1/3) ... [2023-12-02 13:16:38,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4209d551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:16:38, skipping insertion in model container [2023-12-02 13:16:38,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:36" (2/3) ... [2023-12-02 13:16:38,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4209d551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:16:38, skipping insertion in model container [2023-12-02 13:16:38,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:16:38" (3/3) ... [2023-12-02 13:16:38,176 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:16:38,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:16:38,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:16:38,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:16:38,263 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;@6307b0a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:16:38,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:16:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:16:38,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:38,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:16:38,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:16:38,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:38,283 INFO L85 PathProgramCache]: Analyzing trace with hash 20587746, now seen corresponding path program 1 times [2023-12-02 13:16:38,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:38,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6694876] [2023-12-02 13:16:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:40,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:40,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6694876] [2023-12-02 13:16:40,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6694876] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:40,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:40,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:16:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135369962] [2023-12-02 13:16:40,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:40,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:16:40,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:16:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:16:40,663 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:40,740 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2023-12-02 13:16:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:16:40,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 13:16:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:40,751 INFO L225 Difference]: With dead ends: 15 [2023-12-02 13:16:40,751 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 13:16:40,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:16:40,758 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:40,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:16:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 13:16:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-12-02 13:16:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 13:16:40,792 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-12-02 13:16:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:40,793 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 13:16:40,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 13:16:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:16:40,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:40,794 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 13:16:40,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:16:40,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:16:40,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:40,795 INFO L85 PathProgramCache]: Analyzing trace with hash -845417697, now seen corresponding path program 1 times [2023-12-02 13:16:40,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:40,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388963355] [2023-12-02 13:16:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:40,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:47,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:47,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388963355] [2023-12-02 13:16:47,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388963355] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:16:47,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116594781] [2023-12-02 13:16:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:47,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:16:47,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:16:47,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:16:47,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:16:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:47,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 13:16:47,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:16:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:54,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:27:57,634 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 13:27:57,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-12-02 13:27:57,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 13:27:57,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968915584] [2023-12-02 13:27:57,657 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 13:27:57,657 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:27:57,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:27:57,666 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:27:57,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:27:57,692 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:332) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:223) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2023-12-02 13:27:57,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:27:57,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 13:27:57,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719316734] [2023-12-02 13:27:57,697 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:27:57,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:27:57,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:27:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:27:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:27:57,700 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:27:57,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:27:57,702 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:27:57,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:27:57,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 13:27:57,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:27:57,909 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 13:27:57,913 INFO L158 Benchmark]: Toolchain (without parser) took 681451.55ms. Allocated memory was 148.9MB in the beginning and 1.1GB in the end (delta: 975.2MB). Free memory was 111.1MB in the beginning and 726.3MB in the end (delta: -615.2MB). Peak memory consumption was 359.8MB. Max. memory is 16.1GB. [2023-12-02 13:27:57,915 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory is still 83.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:27:57,915 INFO L158 Benchmark]: CACSL2BoogieTranslator took 362.82ms. Allocated memory is still 148.9MB. Free memory was 111.0MB in the beginning and 95.0MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 13:27:57,916 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.44ms. Allocated memory is still 148.9MB. Free memory was 95.0MB in the beginning and 92.1MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 13:27:57,916 INFO L158 Benchmark]: Boogie Preprocessor took 41.90ms. Allocated memory is still 148.9MB. Free memory was 92.1MB in the beginning and 89.6MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 13:27:57,918 INFO L158 Benchmark]: RCFGBuilder took 1239.95ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 89.6MB in the beginning and 137.9MB in the end (delta: -48.3MB). Peak memory consumption was 42.3MB. Max. memory is 16.1GB. [2023-12-02 13:27:57,922 INFO L158 Benchmark]: TraceAbstraction took 679742.87ms. Allocated memory was 180.4MB in the beginning and 1.1GB in the end (delta: 943.7MB). Free memory was 136.9MB in the beginning and 726.3MB in the end (delta: -589.5MB). Peak memory consumption was 353.2MB. Max. memory is 16.1GB. [2023-12-02 13:27:57,928 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory is still 83.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 362.82ms. Allocated memory is still 148.9MB. Free memory was 111.0MB in the beginning and 95.0MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.44ms. Allocated memory is still 148.9MB. Free memory was 95.0MB in the beginning and 92.1MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.90ms. Allocated memory is still 148.9MB. Free memory was 92.1MB in the beginning and 89.6MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1239.95ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 89.6MB in the beginning and 137.9MB in the end (delta: -48.3MB). Peak memory consumption was 42.3MB. Max. memory is 16.1GB. * TraceAbstraction took 679742.87ms. Allocated memory was 180.4MB in the beginning and 1.1GB in the end (delta: 943.7MB). Free memory was 136.9MB in the beginning and 726.3MB in the end (delta: -589.5MB). Peak memory consumption was 353.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh --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 ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:27:59,801 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:27:59,881 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 13:27:59,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:27:59,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:27:59,915 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:27:59,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:27:59,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:27:59,917 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:27:59,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:27:59,918 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:27:59,919 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:27:59,920 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:27:59,920 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:27:59,921 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:27:59,922 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:27:59,923 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:27:59,923 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:27:59,924 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:27:59,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:27:59,925 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:27:59,926 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:27:59,926 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:27:59,927 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:27:59,927 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 13:27:59,928 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 13:27:59,928 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 13:27:59,928 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:27:59,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:27:59,929 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:27:59,930 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:27:59,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 13:27:59,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:27:59,931 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:27:59,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:27:59,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:27:59,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:27:59,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:27:59,932 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 13:27:59,932 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 13:27:59,933 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:27:59,933 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:27:59,933 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:27:59,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:27:59,934 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 [2023-12-02 13:28:00,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:28:00,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:28:00,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:28:00,254 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:28:00,254 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:28:00,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:28:03,165 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:28:03,421 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:28:03,422 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:28:03,436 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/data/8a8da96e2/4e72d761a65f41e59a50fca6107a1b9a/FLAGa8efcc6ea [2023-12-02 13:28:03,454 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/data/8a8da96e2/4e72d761a65f41e59a50fca6107a1b9a [2023-12-02 13:28:03,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:28:03,459 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:28:03,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:28:03,461 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:28:03,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:28:03,468 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:03,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1718a53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03, skipping insertion in model container [2023-12-02 13:28:03,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:03,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:28:03,791 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_86d48611-7676-4a36-8c13-5ad202accf44/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2023-12-02 13:28:03,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:28:03,815 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:28:03,883 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_86d48611-7676-4a36-8c13-5ad202accf44/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2023-12-02 13:28:03,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:28:03,906 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:28:03,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03 WrapperNode [2023-12-02 13:28:03,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:28:03,908 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:28:03,908 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:28:03,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:28:03,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:03,933 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:03,970 INFO L138 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 354 [2023-12-02 13:28:03,971 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:28:03,971 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:28:03,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:28:03,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:28:03,983 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:03,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:03,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:03,990 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:04,003 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:04,010 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:04,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:04,017 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:04,022 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:28:04,023 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:28:04,024 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:28:04,024 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:28:04,025 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (1/1) ... [2023-12-02 13:28:04,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:28:04,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:28:04,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:28:04,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:28:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:28:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 13:28:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:28:04,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:28:04,222 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:28:04,224 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:28:04,768 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:28:04,808 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:28:04,808 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:28:04,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:28:04 BoogieIcfgContainer [2023-12-02 13:28:04,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:28:04,812 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:28:04,812 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:28:04,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:28:04,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:28:03" (1/3) ... [2023-12-02 13:28:04,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f05e253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:28:04, skipping insertion in model container [2023-12-02 13:28:04,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:28:03" (2/3) ... [2023-12-02 13:28:04,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f05e253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:28:04, skipping insertion in model container [2023-12-02 13:28:04,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:28:04" (3/3) ... [2023-12-02 13:28:04,819 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:28:04,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:28:04,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:28:04,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:28:04,907 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;@2a65a47e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:28:04,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:28:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 96 states have (on average 1.78125) internal successors, (171), 97 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 13:28:04,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:04,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:04,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:04,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1398938888, now seen corresponding path program 1 times [2023-12-02 13:28:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:04,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194030652] [2023-12-02 13:28:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:04,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:04,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:04,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:04,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 13:28:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:05,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 13:28:05,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:05,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:05,124 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194030652] [2023-12-02 13:28:05,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194030652] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:05,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:05,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:28:05,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146820877] [2023-12-02 13:28:05,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:05,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:28:05,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:05,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:28:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:28:05,168 INFO L87 Difference]: Start difference. First operand has 98 states, 96 states have (on average 1.78125) internal successors, (171), 97 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:05,209 INFO L93 Difference]: Finished difference Result 159 states and 273 transitions. [2023-12-02 13:28:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:28:05,212 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 13:28:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:05,222 INFO L225 Difference]: With dead ends: 159 [2023-12-02 13:28:05,222 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 13:28:05,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:28:05,228 INFO L413 NwaCegarLoop]: 163 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, 163 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 [2023-12-02 13:28:05,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 13:28:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-12-02 13:28:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.7473684210526317) internal successors, (166), 95 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 166 transitions. [2023-12-02 13:28:05,265 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 166 transitions. Word has length 30 [2023-12-02 13:28:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:05,265 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 166 transitions. [2023-12-02 13:28:05,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 166 transitions. [2023-12-02 13:28:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 13:28:05,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:05,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:05,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:05,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:05,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:05,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:05,470 INFO L85 PathProgramCache]: Analyzing trace with hash 524289146, now seen corresponding path program 1 times [2023-12-02 13:28:05,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:05,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461028261] [2023-12-02 13:28:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:05,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:05,472 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:05,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 13:28:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:05,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:28:05,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:05,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:05,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461028261] [2023-12-02 13:28:05,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461028261] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:05,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:05,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:28:05,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867161316] [2023-12-02 13:28:05,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:05,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:28:05,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:28:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:28:05,640 INFO L87 Difference]: Start difference. First operand 96 states and 166 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:05,731 INFO L93 Difference]: Finished difference Result 159 states and 267 transitions. [2023-12-02 13:28:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:28:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 13:28:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:05,733 INFO L225 Difference]: With dead ends: 159 [2023-12-02 13:28:05,733 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 13:28:05,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:28:05,736 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 0 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:05,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 454 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:28:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 13:28:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-12-02 13:28:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4105263157894736) internal successors, (134), 95 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 134 transitions. [2023-12-02 13:28:05,745 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 134 transitions. Word has length 30 [2023-12-02 13:28:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:05,746 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 134 transitions. [2023-12-02 13:28:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 134 transitions. [2023-12-02 13:28:05,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 13:28:05,749 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:05,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:05,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 13:28:05,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:05,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:05,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1941406465, now seen corresponding path program 1 times [2023-12-02 13:28:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:05,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584840167] [2023-12-02 13:28:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:05,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:05,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:05,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:05,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 13:28:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:06,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:28:06,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:06,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:06,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584840167] [2023-12-02 13:28:06,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584840167] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:06,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:06,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:28:06,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669699372] [2023-12-02 13:28:06,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:06,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:06,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:06,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:06,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:06,133 INFO L87 Difference]: Start difference. First operand 96 states and 134 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:06,161 INFO L93 Difference]: Finished difference Result 208 states and 316 transitions. [2023-12-02 13:28:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:06,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-02 13:28:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:06,164 INFO L225 Difference]: With dead ends: 208 [2023-12-02 13:28:06,165 INFO L226 Difference]: Without dead ends: 148 [2023-12-02 13:28:06,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:06,167 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 78 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:06,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 277 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:06,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-02 13:28:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2023-12-02 13:28:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4896551724137932) internal successors, (216), 145 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 216 transitions. [2023-12-02 13:28:06,182 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 216 transitions. Word has length 61 [2023-12-02 13:28:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:06,183 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 216 transitions. [2023-12-02 13:28:06,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 216 transitions. [2023-12-02 13:28:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 13:28:06,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:06,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:06,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 13:28:06,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:06,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:06,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1144648734, now seen corresponding path program 1 times [2023-12-02 13:28:06,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:06,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145680732] [2023-12-02 13:28:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:06,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:06,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:06,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:06,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 13:28:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:06,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:28:06,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:07,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:07,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:07,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145680732] [2023-12-02 13:28:07,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145680732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:07,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:07,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:28:07,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096705841] [2023-12-02 13:28:07,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:07,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:28:07,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:07,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:28:07,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:28:07,562 INFO L87 Difference]: Start difference. First operand 146 states and 216 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:07,776 INFO L93 Difference]: Finished difference Result 806 states and 1296 transitions. [2023-12-02 13:28:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:28:07,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-02 13:28:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:07,782 INFO L225 Difference]: With dead ends: 806 [2023-12-02 13:28:07,782 INFO L226 Difference]: Without dead ends: 696 [2023-12-02 13:28:07,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:28:07,785 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 706 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:07,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 636 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:28:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2023-12-02 13:28:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 254. [2023-12-02 13:28:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.5454545454545454) internal successors, (391), 253 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 391 transitions. [2023-12-02 13:28:07,810 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 391 transitions. Word has length 61 [2023-12-02 13:28:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:07,810 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 391 transitions. [2023-12-02 13:28:07,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 391 transitions. [2023-12-02 13:28:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 13:28:07,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:07,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:07,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-12-02 13:28:08,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:08,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:08,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:08,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1111312794, now seen corresponding path program 1 times [2023-12-02 13:28:08,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:08,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713605150] [2023-12-02 13:28:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:08,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:08,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:08,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:08,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 13:28:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:08,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:28:08,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:08,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:08,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:08,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713605150] [2023-12-02 13:28:08,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713605150] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:08,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:08,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:28:08,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11265612] [2023-12-02 13:28:08,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:08,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:28:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:28:08,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:28:08,131 INFO L87 Difference]: Start difference. First operand 254 states and 391 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:08,169 INFO L93 Difference]: Finished difference Result 268 states and 408 transitions. [2023-12-02 13:28:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:28:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-12-02 13:28:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:08,173 INFO L225 Difference]: With dead ends: 268 [2023-12-02 13:28:08,173 INFO L226 Difference]: Without dead ends: 266 [2023-12-02 13:28:08,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:28:08,174 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:08,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 383 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-02 13:28:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2023-12-02 13:28:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.528735632183908) internal successors, (399), 261 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 399 transitions. [2023-12-02 13:28:08,190 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 399 transitions. Word has length 62 [2023-12-02 13:28:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:08,191 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 399 transitions. [2023-12-02 13:28:08,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 399 transitions. [2023-12-02 13:28:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 13:28:08,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:08,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:08,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 13:28:08,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:08,397 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:08,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash 91960006, now seen corresponding path program 1 times [2023-12-02 13:28:08,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:08,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780155946] [2023-12-02 13:28:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:08,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:08,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:08,399 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:08,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 13:28:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:08,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:28:08,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:08,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:08,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:08,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780155946] [2023-12-02 13:28:08,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780155946] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:08,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:08,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:28:08,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677593438] [2023-12-02 13:28:08,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:08,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:08,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:08,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:08,600 INFO L87 Difference]: Start difference. First operand 262 states and 399 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:08,631 INFO L93 Difference]: Finished difference Result 686 states and 1077 transitions. [2023-12-02 13:28:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:08,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-12-02 13:28:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:08,635 INFO L225 Difference]: With dead ends: 686 [2023-12-02 13:28:08,635 INFO L226 Difference]: Without dead ends: 460 [2023-12-02 13:28:08,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:08,637 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 62 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:08,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 220 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-12-02 13:28:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 454. [2023-12-02 13:28:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.5474613686534215) internal successors, (701), 453 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 701 transitions. [2023-12-02 13:28:08,658 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 701 transitions. Word has length 63 [2023-12-02 13:28:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:08,659 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 701 transitions. [2023-12-02 13:28:08,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 701 transitions. [2023-12-02 13:28:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 13:28:08,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:08,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:08,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 13:28:08,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:08,862 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:08,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:08,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1478259839, now seen corresponding path program 1 times [2023-12-02 13:28:08,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:08,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028876261] [2023-12-02 13:28:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:08,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:08,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:08,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:08,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 13:28:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:08,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:28:08,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:08,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:08,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:08,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028876261] [2023-12-02 13:28:08,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028876261] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:08,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:08,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:28:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548811551] [2023-12-02 13:28:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:08,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:08,999 INFO L87 Difference]: Start difference. First operand 454 states and 701 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:09,030 INFO L93 Difference]: Finished difference Result 1226 states and 1919 transitions. [2023-12-02 13:28:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:09,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-12-02 13:28:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:09,037 INFO L225 Difference]: With dead ends: 1226 [2023-12-02 13:28:09,037 INFO L226 Difference]: Without dead ends: 808 [2023-12-02 13:28:09,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:09,039 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 70 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:09,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 262 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2023-12-02 13:28:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 806. [2023-12-02 13:28:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 1.546583850931677) internal successors, (1245), 805 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1245 transitions. [2023-12-02 13:28:09,061 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1245 transitions. Word has length 64 [2023-12-02 13:28:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:09,061 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1245 transitions. [2023-12-02 13:28:09,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:09,062 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1245 transitions. [2023-12-02 13:28:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 13:28:09,063 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:09,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:09,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 13:28:09,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:09,265 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:09,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:09,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1951988575, now seen corresponding path program 1 times [2023-12-02 13:28:09,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:09,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065630105] [2023-12-02 13:28:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:09,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:09,267 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:09,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-02 13:28:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:09,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:28:09,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:09,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:09,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:09,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065630105] [2023-12-02 13:28:09,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065630105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:09,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:09,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:28:09,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290902726] [2023-12-02 13:28:09,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:09,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:09,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:09,412 INFO L87 Difference]: Start difference. First operand 806 states and 1245 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:09,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:09,459 INFO L93 Difference]: Finished difference Result 2218 states and 3439 transitions. [2023-12-02 13:28:09,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:09,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-12-02 13:28:09,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:09,467 INFO L225 Difference]: With dead ends: 2218 [2023-12-02 13:28:09,467 INFO L226 Difference]: Without dead ends: 1448 [2023-12-02 13:28:09,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:09,469 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 74 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:09,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 275 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2023-12-02 13:28:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1446. [2023-12-02 13:28:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 1.5314878892733563) internal successors, (2213), 1445 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 2213 transitions. [2023-12-02 13:28:09,508 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 2213 transitions. Word has length 64 [2023-12-02 13:28:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:09,508 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 2213 transitions. [2023-12-02 13:28:09,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 2213 transitions. [2023-12-02 13:28:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 13:28:09,509 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:09,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:09,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-12-02 13:28:09,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:09,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:09,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash -762231071, now seen corresponding path program 1 times [2023-12-02 13:28:09,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:09,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714439815] [2023-12-02 13:28:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:09,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:09,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:09,712 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:09,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 13:28:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:09,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:28:09,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:09,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:09,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:09,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714439815] [2023-12-02 13:28:09,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714439815] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:09,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:09,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:28:09,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592370554] [2023-12-02 13:28:09,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:09,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:09,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:09,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:09,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:09,843 INFO L87 Difference]: Start difference. First operand 1446 states and 2213 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:09,901 INFO L93 Difference]: Finished difference Result 4010 states and 6119 transitions. [2023-12-02 13:28:09,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:09,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-12-02 13:28:09,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:09,914 INFO L225 Difference]: With dead ends: 4010 [2023-12-02 13:28:09,914 INFO L226 Difference]: Without dead ends: 2600 [2023-12-02 13:28:09,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:09,918 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 82 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:09,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 291 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:09,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2023-12-02 13:28:09,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2598. [2023-12-02 13:28:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2597 states have (on average 1.5051983057373892) internal successors, (3909), 2597 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3909 transitions. [2023-12-02 13:28:10,012 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3909 transitions. Word has length 64 [2023-12-02 13:28:10,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:10,012 INFO L495 AbstractCegarLoop]: Abstraction has 2598 states and 3909 transitions. [2023-12-02 13:28:10,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3909 transitions. [2023-12-02 13:28:10,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 13:28:10,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:10,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:10,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-12-02 13:28:10,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:10,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:10,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1698265465, now seen corresponding path program 1 times [2023-12-02 13:28:10,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:10,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288603640] [2023-12-02 13:28:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:10,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:10,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:10,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-02 13:28:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:10,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:28:10,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:10,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:10,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:10,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288603640] [2023-12-02 13:28:10,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288603640] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:10,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:10,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:28:10,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083216875] [2023-12-02 13:28:10,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:10,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:10,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:10,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:10,355 INFO L87 Difference]: Start difference. First operand 2598 states and 3909 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:10,440 INFO L93 Difference]: Finished difference Result 5133 states and 7787 transitions. [2023-12-02 13:28:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:10,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-12-02 13:28:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:10,465 INFO L225 Difference]: With dead ends: 5133 [2023-12-02 13:28:10,465 INFO L226 Difference]: Without dead ends: 3722 [2023-12-02 13:28:10,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:10,469 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 83 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:10,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 302 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2023-12-02 13:28:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2023-12-02 13:28:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 3719 states have (on average 1.4990588867975263) internal successors, (5575), 3719 states have internal predecessors, (5575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5575 transitions. [2023-12-02 13:28:10,630 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5575 transitions. Word has length 65 [2023-12-02 13:28:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:10,631 INFO L495 AbstractCegarLoop]: Abstraction has 3720 states and 5575 transitions. [2023-12-02 13:28:10,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5575 transitions. [2023-12-02 13:28:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 13:28:10,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:10,635 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:10,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 13:28:10,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:10,836 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:10,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1264465898, now seen corresponding path program 1 times [2023-12-02 13:28:10,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:10,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211715159] [2023-12-02 13:28:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:10,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:10,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:10,839 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:10,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 13:28:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:10,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:28:10,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:10,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:10,991 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:10,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211715159] [2023-12-02 13:28:10,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211715159] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:10,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:10,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:28:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420178545] [2023-12-02 13:28:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:10,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:10,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:10,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:10,993 INFO L87 Difference]: Start difference. First operand 3720 states and 5575 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:11,090 INFO L93 Difference]: Finished difference Result 6283 states and 9458 transitions. [2023-12-02 13:28:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-02 13:28:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:11,102 INFO L225 Difference]: With dead ends: 6283 [2023-12-02 13:28:11,102 INFO L226 Difference]: Without dead ends: 2601 [2023-12-02 13:28:11,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:11,108 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 70 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:11,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 292 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2023-12-02 13:28:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2599. [2023-12-02 13:28:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2598 states have (on average 1.4961508852963818) internal successors, (3887), 2598 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3887 transitions. [2023-12-02 13:28:11,193 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3887 transitions. Word has length 90 [2023-12-02 13:28:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:11,193 INFO L495 AbstractCegarLoop]: Abstraction has 2599 states and 3887 transitions. [2023-12-02 13:28:11,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3887 transitions. [2023-12-02 13:28:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 13:28:11,195 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:11,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:11,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 13:28:11,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:11,396 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:11,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:11,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1586866657, now seen corresponding path program 1 times [2023-12-02 13:28:11,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:11,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328760988] [2023-12-02 13:28:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:11,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:11,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:11,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-12-02 13:28:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:11,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:28:11,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:12,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:13,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:13,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328760988] [2023-12-02 13:28:13,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328760988] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:13,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [919729901] [2023-12-02 13:28:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:13,032 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:13,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-12-02 13:28:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:13,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:28:13,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:13,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:13,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [919729901] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:13,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:13,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 13:28:13,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82416287] [2023-12-02 13:28:13,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:13,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:13,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:28:13,239 INFO L87 Difference]: Start difference. First operand 2599 states and 3887 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:13,302 INFO L93 Difference]: Finished difference Result 3867 states and 5793 transitions. [2023-12-02 13:28:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:13,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-12-02 13:28:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:13,311 INFO L225 Difference]: With dead ends: 3867 [2023-12-02 13:28:13,311 INFO L226 Difference]: Without dead ends: 1337 [2023-12-02 13:28:13,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:28:13,316 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 62 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:13,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 273 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2023-12-02 13:28:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1335. [2023-12-02 13:28:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 1.474512743628186) internal successors, (1967), 1334 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1967 transitions. [2023-12-02 13:28:13,383 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1967 transitions. Word has length 91 [2023-12-02 13:28:13,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:13,383 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 1967 transitions. [2023-12-02 13:28:13,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1967 transitions. [2023-12-02 13:28:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 13:28:13,386 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:13,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:13,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-12-02 13:28:13,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2023-12-02 13:28:13,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:13,787 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:13,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash -187895232, now seen corresponding path program 1 times [2023-12-02 13:28:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:13,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651776758] [2023-12-02 13:28:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:13,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:13,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:13,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:13,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 13:28:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:13,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:28:13,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:14,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:15,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651776758] [2023-12-02 13:28:15,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651776758] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:15,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2094857350] [2023-12-02 13:28:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:15,144 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:15,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:15,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:15,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-02 13:28:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:15,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:28:15,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:15,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:15,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2094857350] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:15,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:15,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 13:28:15,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182499241] [2023-12-02 13:28:15,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:15,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:15,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:15,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:28:15,345 INFO L87 Difference]: Start difference. First operand 1335 states and 1967 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:15,371 INFO L93 Difference]: Finished difference Result 1971 states and 2913 transitions. [2023-12-02 13:28:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-12-02 13:28:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:15,376 INFO L225 Difference]: With dead ends: 1971 [2023-12-02 13:28:15,376 INFO L226 Difference]: Without dead ends: 705 [2023-12-02 13:28:15,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:28:15,378 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 56 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:15,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 251 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2023-12-02 13:28:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 703. [2023-12-02 13:28:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 1.4458689458689458) internal successors, (1015), 702 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1015 transitions. [2023-12-02 13:28:15,396 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1015 transitions. Word has length 91 [2023-12-02 13:28:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:15,396 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 1015 transitions. [2023-12-02 13:28:15,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:15,397 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1015 transitions. [2023-12-02 13:28:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 13:28:15,398 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:15,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:15,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-12-02 13:28:15,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2023-12-02 13:28:15,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:15,799 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:15,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash 318390113, now seen corresponding path program 1 times [2023-12-02 13:28:15,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:15,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587974087] [2023-12-02 13:28:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:15,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:15,801 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:15,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-12-02 13:28:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:15,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:28:15,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:16,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:16,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:16,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587974087] [2023-12-02 13:28:16,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587974087] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:16,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681710142] [2023-12-02 13:28:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:16,899 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:16,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:16,901 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:16,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-12-02 13:28:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:17,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:28:17,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:17,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:17,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681710142] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:17,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:17,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 13:28:17,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183088687] [2023-12-02 13:28:17,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:17,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:28:17,081 INFO L87 Difference]: Start difference. First operand 703 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:17,101 INFO L93 Difference]: Finished difference Result 1023 states and 1485 transitions. [2023-12-02 13:28:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:17,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-12-02 13:28:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:17,104 INFO L225 Difference]: With dead ends: 1023 [2023-12-02 13:28:17,104 INFO L226 Difference]: Without dead ends: 389 [2023-12-02 13:28:17,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:28:17,106 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 50 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:17,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 232 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-12-02 13:28:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2023-12-02 13:28:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.4067357512953367) internal successors, (543), 386 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 543 transitions. [2023-12-02 13:28:17,117 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 543 transitions. Word has length 91 [2023-12-02 13:28:17,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:17,117 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 543 transitions. [2023-12-02 13:28:17,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 543 transitions. [2023-12-02 13:28:17,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 13:28:17,118 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:17,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:17,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-12-02 13:28:17,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:17,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:17,525 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:17,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:17,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2024454910, now seen corresponding path program 1 times [2023-12-02 13:28:17,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:17,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707250457] [2023-12-02 13:28:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:17,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:17,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:17,528 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:17,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-12-02 13:28:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:17,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:28:17,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:18,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:18,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:18,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707250457] [2023-12-02 13:28:18,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707250457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:18,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [619876735] [2023-12-02 13:28:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:18,535 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:18,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:18,536 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:18,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-12-02 13:28:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:18,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:28:18,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:28:18,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:28:18,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [619876735] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:18,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770992782] [2023-12-02 13:28:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:18,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:28:18,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:28:18,947 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:28:18,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 13:28:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:19,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:28:19,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:28:19,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:19,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770992782] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:19,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 13:28:19,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 4, 4, 5] total 21 [2023-12-02 13:28:19,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414674789] [2023-12-02 13:28:19,315 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 13:28:19,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 13:28:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 13:28:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:19,318 INFO L87 Difference]: Start difference. First operand 387 states and 543 transitions. Second operand has 21 states, 21 states have (on average 18.428571428571427) internal successors, (387), 21 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:21,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:21,828 INFO L93 Difference]: Finished difference Result 3249 states and 4602 transitions. [2023-12-02 13:28:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-02 13:28:21,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 18.428571428571427) internal successors, (387), 21 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-12-02 13:28:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:21,839 INFO L225 Difference]: With dead ends: 3249 [2023-12-02 13:28:21,839 INFO L226 Difference]: Without dead ends: 2931 [2023-12-02 13:28:21,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=885, Invalid=3021, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 13:28:21,842 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 3253 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3253 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:21,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3253 Valid, 1224 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:28:21,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2023-12-02 13:28:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2672. [2023-12-02 13:28:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 1.3972295020591539) internal successors, (3732), 2671 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 3732 transitions. [2023-12-02 13:28:21,937 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 3732 transitions. Word has length 91 [2023-12-02 13:28:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:21,937 INFO L495 AbstractCegarLoop]: Abstraction has 2672 states and 3732 transitions. [2023-12-02 13:28:21,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 18.428571428571427) internal successors, (387), 21 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 3732 transitions. [2023-12-02 13:28:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 13:28:21,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:21,939 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:21,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-12-02 13:28:22,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:22,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 13:28:22,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:28:22,540 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:22,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:22,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1528952311, now seen corresponding path program 1 times [2023-12-02 13:28:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:22,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809028060] [2023-12-02 13:28:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:22,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:22,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:22,542 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:22,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-12-02 13:28:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:22,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:28:22,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:23,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:23,557 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:23,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809028060] [2023-12-02 13:28:23,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809028060] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:23,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [336451406] [2023-12-02 13:28:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:23,557 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:23,558 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:23,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2023-12-02 13:28:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:23,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:28:23,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:28:24,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:24,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [336451406] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:24,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:24,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 21 [2023-12-02 13:28:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183399451] [2023-12-02 13:28:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:24,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:28:24,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:24,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:28:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:24,578 INFO L87 Difference]: Start difference. First operand 2672 states and 3732 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:24,843 INFO L93 Difference]: Finished difference Result 9079 states and 12813 transitions. [2023-12-02 13:28:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:28:24,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-12-02 13:28:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:24,872 INFO L225 Difference]: With dead ends: 9079 [2023-12-02 13:28:24,872 INFO L226 Difference]: Without dead ends: 7747 [2023-12-02 13:28:24,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:24,875 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 486 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:24,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 899 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:28:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7747 states. [2023-12-02 13:28:25,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7747 to 3851. [2023-12-02 13:28:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3851 states, 3850 states have (on average 1.39012987012987) internal successors, (5352), 3850 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5352 transitions. [2023-12-02 13:28:25,056 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 5352 transitions. Word has length 92 [2023-12-02 13:28:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:25,057 INFO L495 AbstractCegarLoop]: Abstraction has 3851 states and 5352 transitions. [2023-12-02 13:28:25,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 5352 transitions. [2023-12-02 13:28:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 13:28:25,059 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:25,059 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:25,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-12-02 13:28:25,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2023-12-02 13:28:25,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:25,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:25,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:25,460 INFO L85 PathProgramCache]: Analyzing trace with hash 495228979, now seen corresponding path program 1 times [2023-12-02 13:28:25,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:25,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120121692] [2023-12-02 13:28:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:25,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:25,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:25,461 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:25,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 13:28:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:25,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:28:25,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:25,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:25,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:25,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120121692] [2023-12-02 13:28:25,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120121692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:25,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:25,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:28:25,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129530111] [2023-12-02 13:28:25,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:25,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:25,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:25,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:25,551 INFO L87 Difference]: Start difference. First operand 3851 states and 5352 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:25,701 INFO L93 Difference]: Finished difference Result 10108 states and 14071 transitions. [2023-12-02 13:28:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-12-02 13:28:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:25,716 INFO L225 Difference]: With dead ends: 10108 [2023-12-02 13:28:25,717 INFO L226 Difference]: Without dead ends: 6427 [2023-12-02 13:28:25,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:28:25,722 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 67 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:25,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 254 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6427 states. [2023-12-02 13:28:25,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6427 to 6425. [2023-12-02 13:28:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6425 states, 6424 states have (on average 1.3765566625155665) internal successors, (8843), 6424 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6425 states to 6425 states and 8843 transitions. [2023-12-02 13:28:25,914 INFO L78 Accepts]: Start accepts. Automaton has 6425 states and 8843 transitions. Word has length 93 [2023-12-02 13:28:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:25,914 INFO L495 AbstractCegarLoop]: Abstraction has 6425 states and 8843 transitions. [2023-12-02 13:28:25,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6425 states and 8843 transitions. [2023-12-02 13:28:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 13:28:25,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:25,916 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:25,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-12-02 13:28:26,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:26,116 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:26,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:26,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1776517762, now seen corresponding path program 1 times [2023-12-02 13:28:26,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:26,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024740226] [2023-12-02 13:28:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:26,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:26,118 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:26,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-12-02 13:28:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:26,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:28:26,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:26,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:27,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:27,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024740226] [2023-12-02 13:28:27,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024740226] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:27,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1556501310] [2023-12-02 13:28:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:27,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:27,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:27,126 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:27,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-12-02 13:28:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:27,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:28:27,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:28:28,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:28,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1556501310] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:28,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:28,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 21 [2023-12-02 13:28:28,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334817460] [2023-12-02 13:28:28,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:28,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:28:28,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:28:28,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:28,122 INFO L87 Difference]: Start difference. First operand 6425 states and 8843 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:28,513 INFO L93 Difference]: Finished difference Result 17746 states and 24686 transitions. [2023-12-02 13:28:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:28:28,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-12-02 13:28:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:28,532 INFO L225 Difference]: With dead ends: 17746 [2023-12-02 13:28:28,532 INFO L226 Difference]: Without dead ends: 15108 [2023-12-02 13:28:28,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:28,535 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 473 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:28,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 954 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:28:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2023-12-02 13:28:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 8743. [2023-12-02 13:28:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8743 states, 8742 states have (on average 1.370395790436971) internal successors, (11980), 8742 states have internal predecessors, (11980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8743 states to 8743 states and 11980 transitions. [2023-12-02 13:28:28,795 INFO L78 Accepts]: Start accepts. Automaton has 8743 states and 11980 transitions. Word has length 93 [2023-12-02 13:28:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:28,796 INFO L495 AbstractCegarLoop]: Abstraction has 8743 states and 11980 transitions. [2023-12-02 13:28:28,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 8743 states and 11980 transitions. [2023-12-02 13:28:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 13:28:28,797 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:28,797 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:28,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2023-12-02 13:28:29,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:29,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:29,198 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:29,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash 355894140, now seen corresponding path program 1 times [2023-12-02 13:28:29,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:29,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922737511] [2023-12-02 13:28:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:29,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:29,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:29,200 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:29,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-12-02 13:28:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:29,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:28:29,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:29,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:30,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:30,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922737511] [2023-12-02 13:28:30,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922737511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:30,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603394442] [2023-12-02 13:28:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:30,156 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:30,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:30,157 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:30,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-12-02 13:28:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:30,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:28:30,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:28:31,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:31,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603394442] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:31,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:31,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 21 [2023-12-02 13:28:31,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027097828] [2023-12-02 13:28:31,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:31,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:28:31,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:28:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:31,053 INFO L87 Difference]: Start difference. First operand 8743 states and 11980 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:31,468 INFO L93 Difference]: Finished difference Result 19908 states and 27604 transitions. [2023-12-02 13:28:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:28:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-12-02 13:28:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:31,491 INFO L225 Difference]: With dead ends: 19908 [2023-12-02 13:28:31,491 INFO L226 Difference]: Without dead ends: 17418 [2023-12-02 13:28:31,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:31,496 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 480 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:31,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 920 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:28:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17418 states. [2023-12-02 13:28:31,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17418 to 10943. [2023-12-02 13:28:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10943 states, 10942 states have (on average 1.3662950100530067) internal successors, (14950), 10942 states have internal predecessors, (14950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10943 states to 10943 states and 14950 transitions. [2023-12-02 13:28:31,884 INFO L78 Accepts]: Start accepts. Automaton has 10943 states and 14950 transitions. Word has length 93 [2023-12-02 13:28:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:31,884 INFO L495 AbstractCegarLoop]: Abstraction has 10943 states and 14950 transitions. [2023-12-02 13:28:31,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 10943 states and 14950 transitions. [2023-12-02 13:28:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 13:28:31,888 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:31,888 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:31,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:32,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:32,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:32,294 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:32,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:32,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1446037382, now seen corresponding path program 1 times [2023-12-02 13:28:32,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:32,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415328169] [2023-12-02 13:28:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:32,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:32,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:32,297 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:32,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-12-02 13:28:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:32,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:28:32,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:33,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:33,356 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:33,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415328169] [2023-12-02 13:28:33,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415328169] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:33,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1080606533] [2023-12-02 13:28:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:33,356 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:33,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:33,357 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:33,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-02 13:28:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:33,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:28:33,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 13:28:34,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:34,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1080606533] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:34,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:34,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 21 [2023-12-02 13:28:34,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92203229] [2023-12-02 13:28:34,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:28:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:28:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:34,310 INFO L87 Difference]: Start difference. First operand 10943 states and 14950 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:34,796 INFO L93 Difference]: Finished difference Result 22234 states and 30744 transitions. [2023-12-02 13:28:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:28:34,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-12-02 13:28:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:34,817 INFO L225 Difference]: With dead ends: 22234 [2023-12-02 13:28:34,817 INFO L226 Difference]: Without dead ends: 19596 [2023-12-02 13:28:34,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:34,825 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 470 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:34,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 903 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:28:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19596 states. [2023-12-02 13:28:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19596 to 13231. [2023-12-02 13:28:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13231 states, 13230 states have (on average 1.363416477702192) internal successors, (18038), 13230 states have internal predecessors, (18038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:35,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13231 states to 13231 states and 18038 transitions. [2023-12-02 13:28:35,259 INFO L78 Accepts]: Start accepts. Automaton has 13231 states and 18038 transitions. Word has length 93 [2023-12-02 13:28:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:35,259 INFO L495 AbstractCegarLoop]: Abstraction has 13231 states and 18038 transitions. [2023-12-02 13:28:35,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 13231 states and 18038 transitions. [2023-12-02 13:28:35,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 13:28:35,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:35,261 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:35,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-12-02 13:28:35,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2023-12-02 13:28:35,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:35,662 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:35,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:35,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2070537096, now seen corresponding path program 1 times [2023-12-02 13:28:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:35,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381289165] [2023-12-02 13:28:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:35,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:35,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:35,664 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:35,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-12-02 13:28:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:35,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:28:35,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:36,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:36,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:36,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381289165] [2023-12-02 13:28:36,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381289165] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:36,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1947468633] [2023-12-02 13:28:36,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:36,839 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:36,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:36,840 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:36,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-02 13:28:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:36,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:28:36,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:37,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:37,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1947468633] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:37,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:37,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 13:28:37,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171288228] [2023-12-02 13:28:37,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:37,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:28:37,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:37,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:28:37,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:28:37,015 INFO L87 Difference]: Start difference. First operand 13231 states and 18038 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:37,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:37,528 INFO L93 Difference]: Finished difference Result 31207 states and 42417 transitions. [2023-12-02 13:28:37,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:28:37,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-12-02 13:28:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:37,544 INFO L225 Difference]: With dead ends: 31207 [2023-12-02 13:28:37,544 INFO L226 Difference]: Without dead ends: 19033 [2023-12-02 13:28:37,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:28:37,558 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 62 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:37,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 301 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19033 states. [2023-12-02 13:28:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19033 to 18965. [2023-12-02 13:28:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18965 states, 18964 states have (on average 1.3404872389791183) internal successors, (25421), 18964 states have internal predecessors, (25421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18965 states to 18965 states and 25421 transitions. [2023-12-02 13:28:38,129 INFO L78 Accepts]: Start accepts. Automaton has 18965 states and 25421 transitions. Word has length 93 [2023-12-02 13:28:38,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:38,130 INFO L495 AbstractCegarLoop]: Abstraction has 18965 states and 25421 transitions. [2023-12-02 13:28:38,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 18965 states and 25421 transitions. [2023-12-02 13:28:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 13:28:38,132 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:38,132 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:38,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:38,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-12-02 13:28:38,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:38,533 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:38,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:38,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1587995055, now seen corresponding path program 1 times [2023-12-02 13:28:38,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:38,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439643241] [2023-12-02 13:28:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:38,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:38,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:38,535 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:38,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-12-02 13:28:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:38,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:28:38,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:39,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:39,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:39,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439643241] [2023-12-02 13:28:39,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439643241] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:39,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1462669812] [2023-12-02 13:28:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:39,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:39,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:39,504 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:39,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 13:28:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:39,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:28:39,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:28:40,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:28:40,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1462669812] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:40,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:40,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 21 [2023-12-02 13:28:40,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969339132] [2023-12-02 13:28:40,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:28:40,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:28:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:40,474 INFO L87 Difference]: Start difference. First operand 18965 states and 25421 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:41,350 INFO L93 Difference]: Finished difference Result 34269 states and 46471 transitions. [2023-12-02 13:28:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:28:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-12-02 13:28:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:41,376 INFO L225 Difference]: With dead ends: 34269 [2023-12-02 13:28:41,376 INFO L226 Difference]: Without dead ends: 30883 [2023-12-02 13:28:41,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:28:41,384 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 469 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:41,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 903 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:28:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30883 states. [2023-12-02 13:28:41,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30883 to 21789. [2023-12-02 13:28:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21789 states, 21788 states have (on average 1.3382136956122637) internal successors, (29157), 21788 states have internal predecessors, (29157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21789 states to 21789 states and 29157 transitions. [2023-12-02 13:28:42,035 INFO L78 Accepts]: Start accepts. Automaton has 21789 states and 29157 transitions. Word has length 93 [2023-12-02 13:28:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:42,035 INFO L495 AbstractCegarLoop]: Abstraction has 21789 states and 29157 transitions. [2023-12-02 13:28:42,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:28:42,035 INFO L276 IsEmpty]: Start isEmpty. Operand 21789 states and 29157 transitions. [2023-12-02 13:28:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 13:28:42,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:42,038 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:42,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:42,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2023-12-02 13:28:42,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:42,439 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:42,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:42,439 INFO L85 PathProgramCache]: Analyzing trace with hash -650716099, now seen corresponding path program 1 times [2023-12-02 13:28:42,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:28:42,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660139020] [2023-12-02 13:28:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:42,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:28:42,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:28:42,441 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:28:42,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-12-02 13:28:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:42,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:28:42,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:43,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:43,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:28:43,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660139020] [2023-12-02 13:28:43,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660139020] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:43,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [778943589] [2023-12-02 13:28:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:43,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:28:43,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:28:43,451 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:28:43,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 13:28:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:43,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:28:43,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:44,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:44,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [778943589] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:44,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153871354] [2023-12-02 13:28:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:44,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:28:44,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:28:44,754 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:28:44,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 13:28:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:44,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:28:44,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:46,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:46,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153871354] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:28:46,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 13:28:46,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 44 [2023-12-02 13:28:46,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302143666] [2023-12-02 13:28:46,455 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 13:28:46,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-02 13:28:46,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:28:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-02 13:28:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 13:28:46,458 INFO L87 Difference]: Start difference. First operand 21789 states and 29157 transitions. Second operand has 44 states, 44 states have (on average 10.590909090909092) internal successors, (466), 44 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:29:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:29:55,956 INFO L93 Difference]: Finished difference Result 230674 states and 313661 transitions. [2023-12-02 13:29:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 416 states. [2023-12-02 13:29:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 10.590909090909092) internal successors, (466), 44 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-12-02 13:29:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:29:56,179 INFO L225 Difference]: With dead ends: 230674 [2023-12-02 13:29:56,179 INFO L226 Difference]: Without dead ends: 209375 [2023-12-02 13:29:56,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 456 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89700 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=22047, Invalid=187259, Unknown=0, NotChecked=0, Total=209306 [2023-12-02 13:29:56,241 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 15001 mSDsluCounter, 4455 mSDsCounter, 0 mSdLazyCounter, 4841 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15001 SdHoareTripleChecker+Valid, 4638 SdHoareTripleChecker+Invalid, 5121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 4841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:29:56,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15001 Valid, 4638 Invalid, 5121 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [280 Valid, 4841 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-12-02 13:29:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209375 states. [2023-12-02 13:30:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209375 to 114703. [2023-12-02 13:30:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114703 states, 114702 states have (on average 1.3319384143258182) internal successors, (152776), 114702 states have internal predecessors, (152776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:30:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114703 states to 114703 states and 152776 transitions. [2023-12-02 13:30:01,117 INFO L78 Accepts]: Start accepts. Automaton has 114703 states and 152776 transitions. Word has length 95 [2023-12-02 13:30:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:30:01,117 INFO L495 AbstractCegarLoop]: Abstraction has 114703 states and 152776 transitions. [2023-12-02 13:30:01,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 10.590909090909092) internal successors, (466), 44 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:30:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 114703 states and 152776 transitions. [2023-12-02 13:30:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-02 13:30:01,122 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:30:01,123 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:30:01,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2023-12-02 13:30:01,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-02 13:30:01,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-02 13:30:01,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:30:01,724 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:30:01,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:30:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash 979165263, now seen corresponding path program 1 times [2023-12-02 13:30:01,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:30:01,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124379276] [2023-12-02 13:30:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:30:01,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:30:01,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:30:01,726 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:30:01,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-12-02 13:30:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:30:01,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:30:01,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:30:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:30:02,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:30:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:30:02,840 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:30:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124379276] [2023-12-02 13:30:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124379276] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:30:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [341538250] [2023-12-02 13:30:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:30:02,841 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:30:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:30:02,842 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:30:02,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2023-12-02 13:30:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:30:02,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:30:02,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:30:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:30:04,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:30:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:30:04,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [341538250] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:30:04,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033866197] [2023-12-02 13:30:04,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:30:04,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:30:04,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:30:04,454 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:30:04,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86d48611-7676-4a36-8c13-5ad202accf44/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 13:30:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:30:04,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 13:30:04,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:30:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:30:05,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:30:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:30:05,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033866197] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:30:05,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 13:30:05,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 13:30:05,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180199204] [2023-12-02 13:30:05,753 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 13:30:05,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 13:30:05,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:30:05,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 13:30:05,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 13:30:05,755 INFO L87 Difference]: Start difference. First operand 114703 states and 152776 transitions. Second operand has 37 states, 37 states have (on average 11.756756756756756) internal successors, (435), 37 states have internal predecessors, (435), 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)