./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/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_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep60-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/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_37d0493b-96fd-4a12-bc86-59efa205b633/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 b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:41:13,293 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:41:13,370 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:41:13,375 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:41:13,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:41:13,399 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:41:13,400 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:41:13,400 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:41:13,401 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:41:13,402 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:41:13,402 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:41:13,403 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:41:13,403 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:41:13,404 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:41:13,404 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:41:13,405 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:41:13,405 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:41:13,406 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:41:13,406 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:41:13,407 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:41:13,407 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:41:13,409 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:41:13,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:41:13,410 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:41:13,410 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:41:13,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:41:13,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:41:13,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:41:13,412 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:41:13,412 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:41:13,412 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:41:13,413 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:41:13,413 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:41:13,413 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:41:13,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:41:13,414 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:41:13,414 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:41:13,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:41:13,414 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:41:13,415 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:41:13,415 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:41:13,415 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:41:13,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:41:13,415 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:41:13,416 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:41:13,416 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:41:13,416 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:41:13,416 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_37d0493b-96fd-4a12-bc86-59efa205b633/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 [2023-12-02 14:41:13,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:41:13,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:41:13,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:41:13,688 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:41:13,689 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:41:13,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-12-02 14:41:16,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:41:16,534 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:41:16,535 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-12-02 14:41:16,542 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/data/57e2d2dc3/bbce8da4e5724eefb3af39d829b28834/FLAGe5ab4b0c1 [2023-12-02 14:41:16,554 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/data/57e2d2dc3/bbce8da4e5724eefb3af39d829b28834 [2023-12-02 14:41:16,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:41:16,558 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:41:16,559 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:41:16,559 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:41:16,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:41:16,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d94d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16, skipping insertion in model container [2023-12-02 14:41:16,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,588 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:41:16,768 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_37d0493b-96fd-4a12-bc86-59efa205b633/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2023-12-02 14:41:16,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:41:16,781 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:41:16,799 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_37d0493b-96fd-4a12-bc86-59efa205b633/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2023-12-02 14:41:16,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:41:16,812 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:41:16,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16 WrapperNode [2023-12-02 14:41:16,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:41:16,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:41:16,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:41:16,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:41:16,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,824 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,838 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-02 14:41:16,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:41:16,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:41:16,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:41:16,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:41:16,845 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,852 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,854 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,855 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,856 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,858 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:41:16,858 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:41:16,858 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:41:16,858 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:41:16,859 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (1/1) ... [2023-12-02 14:41:16,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:41:16,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:16,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:41:16,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:41:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:41:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:41:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:41:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:41:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:41:16,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:41:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:41:16,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:41:16,918 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-12-02 14:41:16,918 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-12-02 14:41:16,992 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:41:16,994 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:41:17,143 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:41:17,200 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:41:17,200 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 14:41:17,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:41:17 BoogieIcfgContainer [2023-12-02 14:41:17,202 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:41:17,205 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:41:17,205 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:41:17,208 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:41:17,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:41:16" (1/3) ... [2023-12-02 14:41:17,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1551f2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:41:17, skipping insertion in model container [2023-12-02 14:41:17,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:41:16" (2/3) ... [2023-12-02 14:41:17,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1551f2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:41:17, skipping insertion in model container [2023-12-02 14:41:17,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:41:17" (3/3) ... [2023-12-02 14:41:17,211 INFO L112 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2023-12-02 14:41:17,228 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:41:17,228 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:41:17,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:41:17,272 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;@ab31fd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:41:17,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:41:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 14:41:17,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:17,285 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:17,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:17,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash -673086435, now seen corresponding path program 1 times [2023-12-02 14:41:17,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:17,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347757170] [2023-12-02 14:41:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 14:41:17,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:17,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347757170] [2023-12-02 14:41:17,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347757170] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:41:17,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:41:17,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:41:17,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881877499] [2023-12-02 14:41:17,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:41:17,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:41:17,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:17,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:41:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:41:17,580 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 14:41:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:17,623 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-12-02 14:41:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:41:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-12-02 14:41:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:17,631 INFO L225 Difference]: With dead ends: 33 [2023-12-02 14:41:17,631 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 14:41:17,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:41:17,637 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:17,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:17,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 14:41:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-02 14:41:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-12-02 14:41:17,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2023-12-02 14:41:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:17,666 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-12-02 14:41:17,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 14:41:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-12-02 14:41:17,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 14:41:17,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:17,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:17,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:41:17,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:17,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash -139672761, now seen corresponding path program 1 times [2023-12-02 14:41:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:17,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932626769] [2023-12-02 14:41:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:17,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 14:41:17,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932626769] [2023-12-02 14:41:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932626769] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312028377] [2023-12-02 14:41:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:17,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:17,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:17,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:17,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:41:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:17,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:41:17,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 14:41:17,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:41:17,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312028377] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:41:17,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:41:17,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-02 14:41:17,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666972494] [2023-12-02 14:41:17,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:41:17,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:41:17,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:17,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:41:17,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:41:17,901 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:41:17,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:17,922 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-12-02 14:41:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:41:17,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-12-02 14:41:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:17,924 INFO L225 Difference]: With dead ends: 29 [2023-12-02 14:41:17,924 INFO L226 Difference]: Without dead ends: 17 [2023-12-02 14:41:17,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:41:17,926 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:17,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-02 14:41:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-02 14:41:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-02 14:41:17,932 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2023-12-02 14:41:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:17,932 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-02 14:41:17,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:41:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-02 14:41:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 14:41:17,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:17,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:17,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:41:18,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:18,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:18,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1528172865, now seen corresponding path program 1 times [2023-12-02 14:41:18,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:18,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474441112] [2023-12-02 14:41:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:18,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 14:41:18,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:18,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474441112] [2023-12-02 14:41:18,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474441112] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:18,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923893085] [2023-12-02 14:41:18,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:18,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:18,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:18,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:41:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:18,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:41:18,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 14:41:18,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:41:18,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923893085] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:41:18,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:41:18,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-02 14:41:18,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796518317] [2023-12-02 14:41:18,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:41:18,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:41:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:41:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:41:18,348 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:41:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:18,367 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-12-02 14:41:18,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:41:18,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-12-02 14:41:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:18,368 INFO L225 Difference]: With dead ends: 27 [2023-12-02 14:41:18,368 INFO L226 Difference]: Without dead ends: 18 [2023-12-02 14:41:18,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:41:18,370 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:18,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-02 14:41:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-02 14:41:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-02 14:41:18,376 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2023-12-02 14:41:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:18,378 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-02 14:41:18,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:41:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-02 14:41:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 14:41:18,379 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:18,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:18,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 14:41:18,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 14:41:18,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:18,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2034364435, now seen corresponding path program 1 times [2023-12-02 14:41:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607901477] [2023-12-02 14:41:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 14:41:18,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:18,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607901477] [2023-12-02 14:41:18,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607901477] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:18,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981870021] [2023-12-02 14:41:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:18,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:18,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:18,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:18,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:41:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:18,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:41:18,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 14:41:18,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 14:41:18,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981870021] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:18,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48752826] [2023-12-02 14:41:18,882 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:18,882 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:18,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:18,890 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:18,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:19,513 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:19,583 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:19,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:19,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:19,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:19,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-12-02 14:41:19,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350766701] [2023-12-02 14:41:19,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:19,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:41:19,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:41:19,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-12-02 14:41:19,966 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 14:41:19,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:19,999 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2023-12-02 14:41:20,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:41:20,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2023-12-02 14:41:20,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:20,001 INFO L225 Difference]: With dead ends: 36 [2023-12-02 14:41:20,001 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 14:41:20,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-12-02 14:41:20,003 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:20,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 14:41:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 14:41:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-02 14:41:20,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-12-02 14:41:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:20,008 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-02 14:41:20,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 14:41:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-02 14:41:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 14:41:20,010 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:20,010 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:20,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 14:41:20,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:20,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:20,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:20,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2046259095, now seen corresponding path program 2 times [2023-12-02 14:41:20,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:20,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711750186] [2023-12-02 14:41:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:20,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 14:41:20,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:20,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711750186] [2023-12-02 14:41:20,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711750186] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:20,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106141271] [2023-12-02 14:41:20,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:41:20,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:20,315 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:20,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:41:20,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 14:41:20,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:20,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:41:20,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 14:41:20,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 14:41:20,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106141271] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:20,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562186468] [2023-12-02 14:41:20,439 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:20,439 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:20,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:20,439 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:20,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:20,741 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:20,792 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:21,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '793#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:21,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:21,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:21,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-02 14:41:21,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841809213] [2023-12-02 14:41:21,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:21,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:41:21,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:41:21,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-12-02 14:41:21,105 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:41:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:21,140 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-12-02 14:41:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:41:21,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2023-12-02 14:41:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:21,142 INFO L225 Difference]: With dead ends: 38 [2023-12-02 14:41:21,142 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 14:41:21,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-12-02 14:41:21,143 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:21,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 14:41:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 14:41:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-02 14:41:21,148 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2023-12-02 14:41:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:21,149 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-02 14:41:21,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:41:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-02 14:41:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 14:41:21,150 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:21,150 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:21,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:41:21,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:21,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:21,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:21,351 INFO L85 PathProgramCache]: Analyzing trace with hash 936463377, now seen corresponding path program 3 times [2023-12-02 14:41:21,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:21,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537422142] [2023-12-02 14:41:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:21,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-12-02 14:41:21,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:21,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537422142] [2023-12-02 14:41:21,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537422142] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:21,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893570477] [2023-12-02 14:41:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:41:21,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:21,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:21,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:21,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:41:21,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:41:21,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:21,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 14:41:21,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 14:41:21,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 14:41:21,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893570477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:21,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321834772] [2023-12-02 14:41:21,725 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:21,726 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:21,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:21,726 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:21,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:22,056 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:22,122 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:22,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1135#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:22,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:22,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:22,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-02 14:41:22,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432087340] [2023-12-02 14:41:22,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:22,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 14:41:22,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 14:41:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=479, Unknown=9, NotChecked=0, Total=600 [2023-12-02 14:41:22,490 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:41:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:22,536 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-12-02 14:41:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 14:41:22,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2023-12-02 14:41:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:22,537 INFO L225 Difference]: With dead ends: 49 [2023-12-02 14:41:22,537 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 14:41:22,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=479, Unknown=9, NotChecked=0, Total=600 [2023-12-02 14:41:22,539 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:22,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 14:41:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 14:41:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-02 14:41:22,545 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2023-12-02 14:41:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:22,545 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-02 14:41:22,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:41:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-02 14:41:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 14:41:22,547 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:22,547 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:22,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 14:41:22,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:22,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:22,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:22,749 INFO L85 PathProgramCache]: Analyzing trace with hash 326898909, now seen corresponding path program 4 times [2023-12-02 14:41:22,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:22,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794718209] [2023-12-02 14:41:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:22,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 14:41:23,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794718209] [2023-12-02 14:41:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794718209] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:23,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393000748] [2023-12-02 14:41:23,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:41:23,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:23,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:23,117 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:23,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:41:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:23,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 14:41:23,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 14:41:23,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 14:41:23,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393000748] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:23,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313410295] [2023-12-02 14:41:23,480 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:23,480 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:23,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:23,481 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:23,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:23,750 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:23,793 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:24,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1566#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:24,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:24,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:24,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2023-12-02 14:41:24,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885573029] [2023-12-02 14:41:24,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:24,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 14:41:24,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 14:41:24,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=910, Unknown=9, NotChecked=0, Total=1260 [2023-12-02 14:41:24,151 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 14:41:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:24,206 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2023-12-02 14:41:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 14:41:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2023-12-02 14:41:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:24,208 INFO L225 Difference]: With dead ends: 62 [2023-12-02 14:41:24,208 INFO L226 Difference]: Without dead ends: 43 [2023-12-02 14:41:24,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=910, Unknown=9, NotChecked=0, Total=1260 [2023-12-02 14:41:24,210 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:24,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:24,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-02 14:41:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-12-02 14:41:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-12-02 14:41:24,217 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2023-12-02 14:41:24,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:24,217 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-12-02 14:41:24,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 14:41:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-12-02 14:41:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 14:41:24,219 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:24,219 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:24,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:41:24,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 14:41:24,424 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:24,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1805368227, now seen corresponding path program 5 times [2023-12-02 14:41:24,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:24,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067792213] [2023-12-02 14:41:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 14:41:25,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:25,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067792213] [2023-12-02 14:41:25,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067792213] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:25,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657932784] [2023-12-02 14:41:25,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:41:25,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:25,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:25,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:25,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:41:25,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:41:25,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:25,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 14:41:25,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 14:41:25,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 14:41:25,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657932784] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:25,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266453688] [2023-12-02 14:41:25,385 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:25,386 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:25,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:25,386 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:25,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:25,598 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:25,635 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:26,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2129#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:26,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:26,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:26,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-12-02 14:41:26,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033272007] [2023-12-02 14:41:26,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:26,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 14:41:26,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:26,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 14:41:26,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1655, Unknown=9, NotChecked=0, Total=2070 [2023-12-02 14:41:26,042 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:41:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:26,117 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2023-12-02 14:41:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 14:41:26,117 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2023-12-02 14:41:26,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:26,118 INFO L225 Difference]: With dead ends: 69 [2023-12-02 14:41:26,118 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 14:41:26,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=1655, Unknown=9, NotChecked=0, Total=2070 [2023-12-02 14:41:26,120 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:26,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:41:26,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 14:41:26,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-02 14:41:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-12-02 14:41:26,127 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2023-12-02 14:41:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:26,128 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-12-02 14:41:26,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:41:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-12-02 14:41:26,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 14:41:26,129 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:26,129 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:26,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:41:26,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 14:41:26,333 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:26,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash 744395783, now seen corresponding path program 6 times [2023-12-02 14:41:26,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:26,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815132930] [2023-12-02 14:41:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:26,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 14:41:27,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:27,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815132930] [2023-12-02 14:41:27,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815132930] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:27,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19923893] [2023-12-02 14:41:27,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:41:27,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:27,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:27,382 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:27,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 14:41:27,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:41:27,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:27,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 14:41:27,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 14:41:27,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 14:41:28,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19923893] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:28,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754265667] [2023-12-02 14:41:28,276 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:28,276 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:28,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:28,276 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:28,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:28,516 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:28,556 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:28,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2850#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:28,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:28,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:28,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2023-12-02 14:41:28,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129330648] [2023-12-02 14:41:28,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:28,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 14:41:28,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 14:41:28,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1316, Invalid=2457, Unknown=9, NotChecked=0, Total=3782 [2023-12-02 14:41:28,954 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 14:41:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:29,027 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2023-12-02 14:41:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 14:41:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2023-12-02 14:41:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:29,028 INFO L225 Difference]: With dead ends: 100 [2023-12-02 14:41:29,028 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 14:41:29,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1316, Invalid=2457, Unknown=9, NotChecked=0, Total=3782 [2023-12-02 14:41:29,031 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:29,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 14:41:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-02 14:41:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-12-02 14:41:29,039 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2023-12-02 14:41:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:29,039 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-12-02 14:41:29,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 14:41:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-12-02 14:41:29,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-02 14:41:29,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:29,041 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:29,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 14:41:29,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 14:41:29,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:29,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1993026717, now seen corresponding path program 7 times [2023-12-02 14:41:29,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:29,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114810295] [2023-12-02 14:41:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:29,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 14:41:31,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114810295] [2023-12-02 14:41:31,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114810295] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215671575] [2023-12-02 14:41:31,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:41:31,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:31,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:31,649 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:31,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 14:41:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:31,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 14:41:31,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 14:41:31,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 14:41:33,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215671575] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:33,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034250384] [2023-12-02 14:41:33,338 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:33,338 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:33,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:33,339 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:33,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:33,524 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:33,556 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:34,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3845#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:34,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:34,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:34,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 63 [2023-12-02 14:41:34,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046050248] [2023-12-02 14:41:34,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:34,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-02 14:41:34,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-02 14:41:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1994, Invalid=3399, Unknown=9, NotChecked=0, Total=5402 [2023-12-02 14:41:34,071 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 14:41:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:34,164 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2023-12-02 14:41:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 14:41:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2023-12-02 14:41:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:34,166 INFO L225 Difference]: With dead ends: 112 [2023-12-02 14:41:34,166 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 14:41:34,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 239 SyntacticMatches, 38 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2107 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1994, Invalid=3399, Unknown=9, NotChecked=0, Total=5402 [2023-12-02 14:41:34,170 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:34,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:41:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 14:41:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-12-02 14:41:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2023-12-02 14:41:34,181 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 100 [2023-12-02 14:41:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:34,181 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2023-12-02 14:41:34,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 14:41:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2023-12-02 14:41:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 14:41:34,184 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:34,184 INFO L195 NwaCegarLoop]: trace histogram [60, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:34,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 14:41:34,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 14:41:34,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:34,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:34,389 INFO L85 PathProgramCache]: Analyzing trace with hash 392092701, now seen corresponding path program 8 times [2023-12-02 14:41:34,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:34,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58719997] [2023-12-02 14:41:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:34,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 2068 trivial. 0 not checked. [2023-12-02 14:41:34,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58719997] [2023-12-02 14:41:34,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58719997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989225937] [2023-12-02 14:41:34,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:41:34,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:34,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:34,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 14:41:35,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:41:35,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:35,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 14:41:35,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2023-12-02 14:41:35,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2023-12-02 14:41:35,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989225937] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:35,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1509029798] [2023-12-02 14:41:35,181 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:35,181 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:35,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:35,181 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:35,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:35,339 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:35,364 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:35,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4916#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:35,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:35,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:35,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-12-02 14:41:35,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420162659] [2023-12-02 14:41:35,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:35,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 14:41:35,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:35,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 14:41:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=715, Unknown=9, NotChecked=0, Total=870 [2023-12-02 14:41:35,677 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:41:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:35,717 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2023-12-02 14:41:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 14:41:35,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2023-12-02 14:41:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:35,719 INFO L225 Difference]: With dead ends: 116 [2023-12-02 14:41:35,719 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 14:41:35,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=715, Unknown=9, NotChecked=0, Total=870 [2023-12-02 14:41:35,720 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:35,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 14:41:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-12-02 14:41:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2023-12-02 14:41:35,727 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 112 [2023-12-02 14:41:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:35,727 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2023-12-02 14:41:35,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:41:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2023-12-02 14:41:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 14:41:35,729 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:35,729 INFO L195 NwaCegarLoop]: trace histogram [60, 33, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:35,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 14:41:35,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 14:41:35,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:35,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1747379625, now seen corresponding path program 9 times [2023-12-02 14:41:35,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:35,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648691345] [2023-12-02 14:41:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:35,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2023-12-02 14:41:36,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:36,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648691345] [2023-12-02 14:41:36,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648691345] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:36,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537474987] [2023-12-02 14:41:36,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:41:36,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:36,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:36,458 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:36,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 14:41:36,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:41:36,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:36,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:41:36,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 290 proven. 66 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2023-12-02 14:41:36,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2023-12-02 14:41:36,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537474987] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:36,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054224430] [2023-12-02 14:41:36,925 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:36,925 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:36,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:36,926 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:36,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:37,101 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:37,131 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:37,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6055#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:37,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:37,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:37,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-12-02 14:41:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944214736] [2023-12-02 14:41:37,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:37,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 14:41:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 14:41:37,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1005, Unknown=9, NotChecked=0, Total=1406 [2023-12-02 14:41:37,442 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:41:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:37,489 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2023-12-02 14:41:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 14:41:37,490 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 119 [2023-12-02 14:41:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:37,491 INFO L225 Difference]: With dead ends: 134 [2023-12-02 14:41:37,491 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 14:41:37,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=1005, Unknown=9, NotChecked=0, Total=1406 [2023-12-02 14:41:37,492 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:37,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 14:41:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-02 14:41:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2023-12-02 14:41:37,502 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 119 [2023-12-02 14:41:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:37,503 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2023-12-02 14:41:37,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:41:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2023-12-02 14:41:37,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 14:41:37,505 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:37,505 INFO L195 NwaCegarLoop]: trace histogram [72, 60, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:37,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 14:41:37,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 14:41:37,705 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:37,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash 635718941, now seen corresponding path program 10 times [2023-12-02 14:41:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:37,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764906145] [2023-12-02 14:41:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:37,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-12-02 14:41:38,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:38,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764906145] [2023-12-02 14:41:38,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764906145] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:38,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021671533] [2023-12-02 14:41:38,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:41:38,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:38,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:38,927 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:38,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 14:41:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:39,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 14:41:39,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 1252 proven. 300 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-12-02 14:41:39,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-12-02 14:41:40,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021671533] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:40,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447535640] [2023-12-02 14:41:40,030 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:40,030 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:40,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:40,030 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:40,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:40,250 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:40,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:40,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7516#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:40,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:40,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:40,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-12-02 14:41:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043071774] [2023-12-02 14:41:40,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:40,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-02 14:41:40,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:40,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-02 14:41:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=2604, Unknown=9, NotChecked=0, Total=4032 [2023-12-02 14:41:40,632 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:41:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:40,703 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2023-12-02 14:41:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-02 14:41:40,703 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 158 [2023-12-02 14:41:40,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:40,705 INFO L225 Difference]: With dead ends: 173 [2023-12-02 14:41:40,705 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 14:41:40,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1419, Invalid=2604, Unknown=9, NotChecked=0, Total=4032 [2023-12-02 14:41:40,708 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:40,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:41:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 14:41:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-12-02 14:41:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2023-12-02 14:41:40,718 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 158 [2023-12-02 14:41:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:40,718 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2023-12-02 14:41:40,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:41:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2023-12-02 14:41:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-12-02 14:41:40,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:40,721 INFO L195 NwaCegarLoop]: trace histogram [150, 60, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:40,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 14:41:40,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 14:41:40,922 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:40,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1239946979, now seen corresponding path program 11 times [2023-12-02 14:41:40,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:40,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547202212] [2023-12-02 14:41:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:40,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 6479 refuted. 0 times theorem prover too weak. 7006 trivial. 0 not checked. [2023-12-02 14:41:44,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:44,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547202212] [2023-12-02 14:41:44,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547202212] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:44,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382008101] [2023-12-02 14:41:44,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:41:44,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:44,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:44,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:44,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 14:41:44,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 14:41:44,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:44,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:41:44,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 5206 proven. 21 refuted. 0 times theorem prover too weak. 8258 trivial. 0 not checked. [2023-12-02 14:41:44,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13464 trivial. 0 not checked. [2023-12-02 14:41:45,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382008101] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:45,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860833738] [2023-12-02 14:41:45,162 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:45,162 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:45,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:45,162 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:45,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:45,316 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:45,341 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:45,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9589#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:45,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:45,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:45,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2023-12-02 14:41:45,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628298094] [2023-12-02 14:41:45,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:45,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-12-02 14:41:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-12-02 14:41:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1538, Invalid=4459, Unknown=9, NotChecked=0, Total=6006 [2023-12-02 14:41:45,887 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:41:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:45,977 INFO L93 Difference]: Finished difference Result 208 states and 226 transitions. [2023-12-02 14:41:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-02 14:41:45,977 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 236 [2023-12-02 14:41:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:45,979 INFO L225 Difference]: With dead ends: 208 [2023-12-02 14:41:45,979 INFO L226 Difference]: Without dead ends: 140 [2023-12-02 14:41:45,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1538, Invalid=4459, Unknown=9, NotChecked=0, Total=6006 [2023-12-02 14:41:45,982 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:45,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:41:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-02 14:41:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-12-02 14:41:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2023-12-02 14:41:45,994 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 236 [2023-12-02 14:41:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:45,994 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2023-12-02 14:41:45,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:41:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2023-12-02 14:41:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-12-02 14:41:45,998 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:45,998 INFO L195 NwaCegarLoop]: trace histogram [153, 60, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:46,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 14:41:46,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:46,199 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:46,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash -274900567, now seen corresponding path program 12 times [2023-12-02 14:41:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:46,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9771787] [2023-12-02 14:41:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:46,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 0 proven. 6736 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2023-12-02 14:41:49,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9771787] [2023-12-02 14:41:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9771787] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680175100] [2023-12-02 14:41:49,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:41:49,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:49,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:49,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:49,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 14:41:49,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:41:49,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:50,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 14:41:50,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 5410 proven. 1326 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2023-12-02 14:41:50,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 0 proven. 6736 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2023-12-02 14:41:51,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680175100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:51,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1005194217] [2023-12-02 14:41:51,270 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:51,270 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:51,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:51,270 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:51,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:51,466 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:51,500 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:51,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11812#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:51,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:52,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:52,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 63 [2023-12-02 14:41:52,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504907202] [2023-12-02 14:41:52,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:52,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-02 14:41:52,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:52,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-02 14:41:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1994, Invalid=3399, Unknown=9, NotChecked=0, Total=5402 [2023-12-02 14:41:52,005 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:41:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:52,075 INFO L93 Difference]: Finished difference Result 226 states and 244 transitions. [2023-12-02 14:41:52,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 14:41:52,076 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 247 [2023-12-02 14:41:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:52,077 INFO L225 Difference]: With dead ends: 226 [2023-12-02 14:41:52,077 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 14:41:52,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 677 SyntacticMatches, 44 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1994, Invalid=3399, Unknown=9, NotChecked=0, Total=5402 [2023-12-02 14:41:52,080 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:52,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:41:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 14:41:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-12-02 14:41:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2023-12-02 14:41:52,088 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 247 [2023-12-02 14:41:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:52,088 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2023-12-02 14:41:52,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:41:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2023-12-02 14:41:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-02 14:41:52,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:52,089 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:52,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 14:41:52,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:52,290 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:52,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:52,290 INFO L85 PathProgramCache]: Analyzing trace with hash -495354083, now seen corresponding path program 13 times [2023-12-02 14:41:52,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:52,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48449480] [2023-12-02 14:41:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:52,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-12-02 14:41:53,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:53,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48449480] [2023-12-02 14:41:53,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48449480] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:53,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934739521] [2023-12-02 14:41:53,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:41:53,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:53,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:53,653 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:53,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 14:41:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:54,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 14:41:54,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 7446 proven. 105 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-12-02 14:41:54,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-12-02 14:41:54,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934739521] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:54,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095617817] [2023-12-02 14:41:54,432 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:41:54,432 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:54,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:54,432 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:54,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:54,591 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:41:54,617 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:54,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14221#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:41:54,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:54,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:41:54,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-12-02 14:41:54,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648849198] [2023-12-02 14:41:54,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 14:41:54,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:54,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 14:41:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=1314, Unknown=9, NotChecked=0, Total=1892 [2023-12-02 14:41:54,919 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:41:54,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:54,966 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2023-12-02 14:41:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 14:41:54,966 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 274 [2023-12-02 14:41:54,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:54,968 INFO L225 Difference]: With dead ends: 233 [2023-12-02 14:41:54,968 INFO L226 Difference]: Without dead ends: 165 [2023-12-02 14:41:54,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=569, Invalid=1314, Unknown=9, NotChecked=0, Total=1892 [2023-12-02 14:41:54,970 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:54,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:41:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-02 14:41:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-12-02 14:41:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:41:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2023-12-02 14:41:54,979 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 274 [2023-12-02 14:41:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:54,979 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2023-12-02 14:41:54,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:41:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2023-12-02 14:41:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-12-02 14:41:54,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:54,981 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:54,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 14:41:55,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 14:41:55,181 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:55,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:55,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1891529501, now seen corresponding path program 14 times [2023-12-02 14:41:55,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:55,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404035346] [2023-12-02 14:41:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:55,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-12-02 14:41:57,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:57,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404035346] [2023-12-02 14:41:57,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404035346] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:41:57,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092009937] [2023-12-02 14:41:57,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:41:57,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:57,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:57,614 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:57,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 14:42:24,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-12-02 14:42:24,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:42:24,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 14:42:24,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:42:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 7446 proven. 465 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-12-02 14:42:25,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:42:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-12-02 14:42:26,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092009937] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:42:26,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534435432] [2023-12-02 14:42:26,003 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 14:42:26,004 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:42:26,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:42:26,004 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:42:26,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:42:26,201 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 10 for LOIs [2023-12-02 14:42:26,229 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:42:26,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16803#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 14:42:26,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:42:26,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:42:26,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2023-12-02 14:42:26,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302508496] [2023-12-02 14:42:26,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:42:26,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 14:42:26,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:42:26,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 14:42:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1932, Invalid=3315, Unknown=9, NotChecked=0, Total=5256 [2023-12-02 14:42:26,604 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 62 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:42:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:42:26,678 INFO L93 Difference]: Finished difference Result 262 states and 295 transitions. [2023-12-02 14:42:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-02 14:42:26,678 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 290 [2023-12-02 14:42:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:42:26,680 INFO L225 Difference]: With dead ends: 262 [2023-12-02 14:42:26,680 INFO L226 Difference]: Without dead ends: 194 [2023-12-02 14:42:26,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 827 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1932, Invalid=3315, Unknown=9, NotChecked=0, Total=5256 [2023-12-02 14:42:26,682 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:42:26,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:42:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-02 14:42:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-12-02 14:42:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0158730158730158) internal successors, (192), 189 states have internal predecessors, (192), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:42:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2023-12-02 14:42:26,695 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 290 [2023-12-02 14:42:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:42:26,695 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2023-12-02 14:42:26,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:42:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2023-12-02 14:42:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-12-02 14:42:26,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:42:26,698 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 59, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:42:26,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 14:42:26,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37d0493b-96fd-4a12-bc86-59efa205b633/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 14:42:26,898 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:42:26,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:42:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash -497593711, now seen corresponding path program 15 times [2023-12-02 14:42:26,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:42:26,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242553278] [2023-12-02 14:42:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:42:26,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms