./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/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_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/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_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/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 675f35e66fa59545cd4a52408711c9386973ccbbb0528c29e7af26cf7aa65f50 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:57:12,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:57:12,506 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:57:12,512 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:57:12,513 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:57:12,534 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:57:12,534 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:57:12,535 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:57:12,535 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:57:12,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:57:12,537 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:57:12,537 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:57:12,538 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:57:12,538 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:57:12,539 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:57:12,539 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:57:12,540 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:57:12,540 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:57:12,541 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:57:12,541 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:57:12,542 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:57:12,543 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:57:12,543 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:57:12,544 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:57:12,544 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:57:12,545 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:57:12,545 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:57:12,546 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:57:12,546 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:57:12,547 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:57:12,547 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:57:12,547 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:57:12,548 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:57:12,548 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:57:12,548 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:57:12,548 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:57:12,549 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:57:12,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:57:12,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:57:12,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:57:12,550 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:57:12,550 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:57:12,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:57:12,550 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:57:12,551 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:57:12,551 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:57:12,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:57:12,551 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_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675f35e66fa59545cd4a52408711c9386973ccbbb0528c29e7af26cf7aa65f50 [2023-12-02 18:57:12,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:57:12,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:57:12,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:57:12,794 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:57:12,795 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:57:12,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2023-12-02 18:57:15,521 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:57:15,674 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:57:15,674 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2023-12-02 18:57:15,681 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/data/6acf72114/107953d17a7a4e34bd651d6b1a44ffb4/FLAG30c91d6a2 [2023-12-02 18:57:15,692 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/data/6acf72114/107953d17a7a4e34bd651d6b1a44ffb4 [2023-12-02 18:57:15,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:57:15,695 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:57:15,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:57:15,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:57:15,700 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:57:15,701 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ab551b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15, skipping insertion in model container [2023-12-02 18:57:15,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,721 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:57:15,841 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_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2023-12-02 18:57:15,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:57:15,871 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:57:15,881 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_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2023-12-02 18:57:15,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:57:15,910 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:57:15,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15 WrapperNode [2023-12-02 18:57:15,910 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:57:15,911 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:57:15,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:57:15,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:57:15,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,951 INFO L138 Inliner]: procedures = 16, calls = 54, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 180 [2023-12-02 18:57:15,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:57:15,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:57:15,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:57:15,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:57:15,959 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,963 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,963 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,971 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,976 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:57:15,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:57:15,984 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:57:15,984 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:57:15,984 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (1/1) ... [2023-12-02 18:57:15,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:57:16,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:16,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:57:16,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:57:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:57:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:57:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:57:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:57:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:57:16,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:57:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:57:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:57:16,113 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:57:16,115 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:57:16,325 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:57:16,399 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:57:16,399 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-12-02 18:57:16,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:57:16 BoogieIcfgContainer [2023-12-02 18:57:16,401 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:57:16,403 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:57:16,404 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:57:16,406 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:57:16,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:57:15" (1/3) ... [2023-12-02 18:57:16,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e011c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:57:16, skipping insertion in model container [2023-12-02 18:57:16,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:57:15" (2/3) ... [2023-12-02 18:57:16,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e011c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:57:16, skipping insertion in model container [2023-12-02 18:57:16,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:57:16" (3/3) ... [2023-12-02 18:57:16,409 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2023-12-02 18:57:16,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:57:16,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:57:16,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:57:16,470 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;@34814275, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:57:16,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:57:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 18:57:16,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:16,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:16,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:16,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash 829594177, now seen corresponding path program 1 times [2023-12-02 18:57:16,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:16,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482558556] [2023-12-02 18:57:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:16,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:57:16,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:16,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482558556] [2023-12-02 18:57:16,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482558556] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:57:16,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:57:16,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:57:16,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205811803] [2023-12-02 18:57:16,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:57:16,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:57:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:57:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:57:16,805 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:16,886 INFO L93 Difference]: Finished difference Result 31 states and 51 transitions. [2023-12-02 18:57:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:57:16,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 18:57:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:16,894 INFO L225 Difference]: With dead ends: 31 [2023-12-02 18:57:16,894 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 18:57:16,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:57:16,900 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:16,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:57:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 18:57:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-02 18:57:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 25 transitions. [2023-12-02 18:57:16,925 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 25 transitions. Word has length 13 [2023-12-02 18:57:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:16,926 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 25 transitions. [2023-12-02 18:57:16,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 25 transitions. [2023-12-02 18:57:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 18:57:16,927 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:16,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:16,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:57:16,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:16,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 655259714, now seen corresponding path program 1 times [2023-12-02 18:57:16,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:16,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772107472] [2023-12-02 18:57:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:16,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:57:17,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:17,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772107472] [2023-12-02 18:57:17,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772107472] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:17,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245075448] [2023-12-02 18:57:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:17,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:17,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:17,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:17,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:57:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:17,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:57:17,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:57:17,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:57:17,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245075448] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:57:17,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:57:17,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-02 18:57:17,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241417515] [2023-12-02 18:57:17,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:57:17,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:57:17,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:17,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:57:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:57:17,183 INFO L87 Difference]: Start difference. First operand 16 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:17,247 INFO L93 Difference]: Finished difference Result 36 states and 60 transitions. [2023-12-02 18:57:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:57:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 18:57:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:17,249 INFO L225 Difference]: With dead ends: 36 [2023-12-02 18:57:17,249 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 18:57:17,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 18:57:17,251 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:17,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:57:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 18:57:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 18:57:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2023-12-02 18:57:17,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 14 [2023-12-02 18:57:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:17,258 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2023-12-02 18:57:17,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2023-12-02 18:57:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 18:57:17,259 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:17,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:17,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:57:17,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 18:57:17,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:17,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1140984400, now seen corresponding path program 1 times [2023-12-02 18:57:17,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:17,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17400775] [2023-12-02 18:57:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:17,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:57:17,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:17,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17400775] [2023-12-02 18:57:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17400775] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:17,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757406445] [2023-12-02 18:57:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:17,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:17,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:17,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:17,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:57:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:17,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:57:17,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:57:17,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:57:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:57:17,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757406445] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:57:17,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1511723175] [2023-12-02 18:57:17,770 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:57:17,770 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:57:17,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:57:17,776 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:57:17,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:57:19,436 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:57:20,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '383#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 18:57:20,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:57:20,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:57:20,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-02 18:57:20,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140028061] [2023-12-02 18:57:20,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:57:20,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:57:20,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:57:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:57:20,083 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:20,150 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2023-12-02 18:57:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:57:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-02 18:57:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:20,152 INFO L225 Difference]: With dead ends: 48 [2023-12-02 18:57:20,152 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 18:57:20,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:57:20,154 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:20,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:57:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 18:57:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-02 18:57:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-12-02 18:57:20,160 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 22 [2023-12-02 18:57:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:20,160 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-12-02 18:57:20,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-12-02 18:57:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 18:57:20,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:20,161 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:20,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:57:20,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 18:57:20,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:20,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:20,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2121834257, now seen corresponding path program 2 times [2023-12-02 18:57:20,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:20,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398731273] [2023-12-02 18:57:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:20,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 18:57:20,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:20,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398731273] [2023-12-02 18:57:20,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398731273] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:20,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532314573] [2023-12-02 18:57:20,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:57:20,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:20,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:20,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:20,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:57:20,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 18:57:20,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:57:20,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:57:20,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 18:57:20,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:57:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 18:57:20,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532314573] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:57:20,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [524786204] [2023-12-02 18:57:20,630 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:57:20,630 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:57:20,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:57:20,630 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:57:20,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:57:21,792 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:57:22,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 18:57:22,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:57:22,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:57:22,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-02 18:57:22,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764366346] [2023-12-02 18:57:22,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:57:22,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:57:22,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:57:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:57:22,375 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:22,479 INFO L93 Difference]: Finished difference Result 70 states and 110 transitions. [2023-12-02 18:57:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:57:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 18:57:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:22,480 INFO L225 Difference]: With dead ends: 70 [2023-12-02 18:57:22,480 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 18:57:22,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:57:22,482 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:22,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:57:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 18:57:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-02 18:57:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-12-02 18:57:22,490 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 25 [2023-12-02 18:57:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:22,490 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-12-02 18:57:22,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-12-02 18:57:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 18:57:22,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:22,492 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:22,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:57:22,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:22,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:22,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash 629949825, now seen corresponding path program 3 times [2023-12-02 18:57:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:22,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438564097] [2023-12-02 18:57:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-02 18:57:22,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:22,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438564097] [2023-12-02 18:57:22,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438564097] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:22,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077633336] [2023-12-02 18:57:22,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:57:22,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:22,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:22,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:57:23,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:57:23,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:57:23,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:57:23,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-02 18:57:23,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:57:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-02 18:57:23,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077633336] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:57:23,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499551975] [2023-12-02 18:57:23,177 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:57:23,178 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:57:23,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:57:23,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:57:23,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:57:24,118 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:57:24,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1209#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 18:57:24,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:57:24,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:57:24,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-02 18:57:24,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486459688] [2023-12-02 18:57:24,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:57:24,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 18:57:24,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 18:57:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:57:24,779 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:24,837 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2023-12-02 18:57:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:57:24,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-02 18:57:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:24,838 INFO L225 Difference]: With dead ends: 102 [2023-12-02 18:57:24,838 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 18:57:24,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 15 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:57:24,839 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:24,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:57:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 18:57:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-02 18:57:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2023-12-02 18:57:24,845 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 49 [2023-12-02 18:57:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:24,845 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2023-12-02 18:57:24,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2023-12-02 18:57:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 18:57:24,847 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:24,847 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:24,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 18:57:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:25,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:25,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1957576161, now seen corresponding path program 4 times [2023-12-02 18:57:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:25,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678306240] [2023-12-02 18:57:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-02 18:57:25,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678306240] [2023-12-02 18:57:25,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678306240] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555426061] [2023-12-02 18:57:25,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:57:25,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:25,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:25,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:25,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:57:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:25,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:57:25,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-02 18:57:25,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:57:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-02 18:57:25,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555426061] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:57:25,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026714418] [2023-12-02 18:57:25,834 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:57:25,834 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:57:25,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:57:25,834 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:57:25,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:57:26,706 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:57:27,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1867#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 18:57:27,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:57:27,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:57:27,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-02 18:57:27,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184613724] [2023-12-02 18:57:27,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:57:27,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 18:57:27,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 18:57:27,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-12-02 18:57:27,610 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:27,675 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2023-12-02 18:57:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 18:57:27,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 18:57:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:27,677 INFO L225 Difference]: With dead ends: 114 [2023-12-02 18:57:27,677 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 18:57:27,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 127 SyntacticMatches, 20 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-12-02 18:57:27,679 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:27,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:57:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 18:57:27,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 18:57:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 68 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2023-12-02 18:57:27,687 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 55 [2023-12-02 18:57:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:27,687 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2023-12-02 18:57:27,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2023-12-02 18:57:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 18:57:27,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:27,689 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:27,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:57:27,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 18:57:27,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:27,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash 199022241, now seen corresponding path program 5 times [2023-12-02 18:57:27,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:27,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431365953] [2023-12-02 18:57:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:27,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-02 18:57:28,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:28,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431365953] [2023-12-02 18:57:28,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431365953] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:28,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095393089] [2023-12-02 18:57:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:57:28,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:28,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:28,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:28,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:57:29,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 18:57:29,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:57:29,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:57:29,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2023-12-02 18:57:29,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:57:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2023-12-02 18:57:29,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095393089] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:57:29,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279326498] [2023-12-02 18:57:29,303 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:57:29,303 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:57:29,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:57:29,304 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:57:29,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:57:30,120 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:57:31,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2655#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 18:57:31,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:57:31,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:57:31,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-12-02 18:57:31,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291396538] [2023-12-02 18:57:31,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:57:31,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 18:57:31,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 18:57:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 18:57:31,266 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:31,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:31,542 INFO L93 Difference]: Finished difference Result 163 states and 229 transitions. [2023-12-02 18:57:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 18:57:31,543 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-12-02 18:57:31,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:31,544 INFO L225 Difference]: With dead ends: 163 [2023-12-02 18:57:31,544 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 18:57:31,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 170 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 18:57:31,545 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:31,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:57:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 18:57:31,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-12-02 18:57:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2023-12-02 18:57:31,554 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 67 [2023-12-02 18:57:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:31,554 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2023-12-02 18:57:31,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2023-12-02 18:57:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 18:57:31,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:31,556 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:31,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:57:31,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:31,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:31,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash -380680094, now seen corresponding path program 6 times [2023-12-02 18:57:31,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:31,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853574679] [2023-12-02 18:57:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:31,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-12-02 18:57:32,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:32,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853574679] [2023-12-02 18:57:32,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853574679] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:32,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354322754] [2023-12-02 18:57:32,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:57:32,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:32,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:32,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:32,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:57:33,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:57:33,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:57:33,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 18:57:33,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-12-02 18:57:33,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:57:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-12-02 18:57:33,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354322754] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:57:33,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642963384] [2023-12-02 18:57:33,744 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:57:33,744 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:57:33,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:57:33,745 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:57:33,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:57:34,684 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:57:37,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3949#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 18:57:37,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:57:37,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:57:37,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-12-02 18:57:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413964120] [2023-12-02 18:57:37,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:57:37,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 18:57:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:37,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 18:57:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 18:57:37,311 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:37,438 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2023-12-02 18:57:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 18:57:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-12-02 18:57:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:37,440 INFO L225 Difference]: With dead ends: 236 [2023-12-02 18:57:37,440 INFO L226 Difference]: Without dead ends: 143 [2023-12-02 18:57:37,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 262 SyntacticMatches, 55 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4412 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 18:57:37,442 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:37,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:57:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-02 18:57:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-12-02 18:57:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0704225352112675) internal successors, (152), 142 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2023-12-02 18:57:37,455 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 116 [2023-12-02 18:57:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:37,455 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2023-12-02 18:57:37,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2023-12-02 18:57:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 18:57:37,458 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:37,459 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:37,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 18:57:37,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 18:57:37,663 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:37,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash 370513089, now seen corresponding path program 7 times [2023-12-02 18:57:37,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:37,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621343535] [2023-12-02 18:57:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:37,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-12-02 18:57:40,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:40,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621343535] [2023-12-02 18:57:40,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621343535] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:40,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530768658] [2023-12-02 18:57:40,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:57:40,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:40,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:40,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:40,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:57:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:40,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 18:57:40,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-12-02 18:57:41,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:57:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-12-02 18:57:43,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530768658] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:57:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687581053] [2023-12-02 18:57:43,361 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:57:43,361 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:57:43,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:57:43,361 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:57:43,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:57:44,164 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:57:47,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5639#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 18:57:47,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:57:47,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:57:47,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-12-02 18:57:47,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195323104] [2023-12-02 18:57:47,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:57:47,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-12-02 18:57:47,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-12-02 18:57:47,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 18:57:47,928 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:48,088 INFO L93 Difference]: Finished difference Result 286 states and 353 transitions. [2023-12-02 18:57:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-02 18:57:48,089 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-12-02 18:57:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:48,091 INFO L225 Difference]: With dead ends: 286 [2023-12-02 18:57:48,091 INFO L226 Difference]: Without dead ends: 193 [2023-12-02 18:57:48,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 312 SyntacticMatches, 55 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9012 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 18:57:48,094 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:48,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:57:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-12-02 18:57:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-12-02 18:57:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0520833333333333) internal successors, (202), 192 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 202 transitions. [2023-12-02 18:57:48,106 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 202 transitions. Word has length 141 [2023-12-02 18:57:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:48,106 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 202 transitions. [2023-12-02 18:57:48,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:57:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 202 transitions. [2023-12-02 18:57:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-02 18:57:48,108 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:48,109 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:48,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:57:48,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 18:57:48,309 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:48,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:48,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1964898273, now seen corresponding path program 8 times [2023-12-02 18:57:48,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:48,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964963080] [2023-12-02 18:57:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:48,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-12-02 18:57:54,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:54,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964963080] [2023-12-02 18:57:54,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964963080] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:54,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649155116] [2023-12-02 18:57:54,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:57:54,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:54,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:54,724 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:54,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:58:16,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 18:58:16,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:58:16,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:58:16,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:58:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5236 trivial. 0 not checked. [2023-12-02 18:58:16,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:58:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5236 trivial. 0 not checked. [2023-12-02 18:58:17,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649155116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:58:17,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686454287] [2023-12-02 18:58:17,373 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:58:17,373 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:58:17,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:58:17,373 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:58:17,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:58:18,077 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:58:26,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7851#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 18:58:26,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:58:26,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:58:26,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2023-12-02 18:58:26,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875762834] [2023-12-02 18:58:26,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:58:26,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-12-02 18:58:26,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:26,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-12-02 18:58:26,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2023-12-02 18:58:26,340 INFO L87 Difference]: Start difference. First operand 193 states and 202 transitions. Second operand has 123 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:26,868 INFO L93 Difference]: Finished difference Result 383 states and 497 transitions. [2023-12-02 18:58:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-12-02 18:58:26,869 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2023-12-02 18:58:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:26,871 INFO L225 Difference]: With dead ends: 383 [2023-12-02 18:58:26,871 INFO L226 Difference]: Without dead ends: 290 [2023-12-02 18:58:26,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 479 SyntacticMatches, 66 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11315 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2023-12-02 18:58:26,875 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:26,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:58:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-02 18:58:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-12-02 18:58:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0346020761245676) internal successors, (299), 289 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 299 transitions. [2023-12-02 18:58:26,888 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 299 transitions. Word has length 191 [2023-12-02 18:58:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:26,888 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 299 transitions. [2023-12-02 18:58:26,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 299 transitions. [2023-12-02 18:58:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-12-02 18:58:26,891 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:26,891 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:58:26,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 18:58:27,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 18:58:27,092 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:27,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:27,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1870155938, now seen corresponding path program 9 times [2023-12-02 18:58:27,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:27,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424458563] [2023-12-02 18:58:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:27,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-12-02 18:58:34,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:34,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424458563] [2023-12-02 18:58:34,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424458563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:58:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360407107] [2023-12-02 18:58:34,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:58:34,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:58:34,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:58:34,664 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:58:34,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:58:35,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:58:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:58:35,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 2768 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-02 18:58:35,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:58:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-12-02 18:58:35,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:58:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-12-02 18:58:44,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360407107] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:58:44,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390014197] [2023-12-02 18:58:44,617 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:58:44,617 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:58:44,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:58:44,617 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:58:44,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:58:45,348 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:58:58,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11113#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 18:58:58,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:58:58,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:58:58,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2023-12-02 18:58:58,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921392658] [2023-12-02 18:58:58,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:58:58,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-12-02 18:58:58,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-12-02 18:58:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2023-12-02 18:58:58,907 INFO L87 Difference]: Start difference. First operand 290 states and 299 transitions. Second operand has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:59,386 INFO L93 Difference]: Finished difference Result 580 states and 698 transitions. [2023-12-02 18:58:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-12-02 18:58:59,387 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2023-12-02 18:58:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:59,389 INFO L225 Difference]: With dead ends: 580 [2023-12-02 18:58:59,389 INFO L226 Difference]: Without dead ends: 391 [2023-12-02 18:58:59,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 642 SyntacticMatches, 115 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36396 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2023-12-02 18:58:59,392 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:59,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:58:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-12-02 18:58:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2023-12-02 18:58:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0256410256410255) internal successors, (400), 390 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 400 transitions. [2023-12-02 18:58:59,405 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 400 transitions. Word has length 288 [2023-12-02 18:58:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:59,405 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 400 transitions. [2023-12-02 18:58:59,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 400 transitions. [2023-12-02 18:58:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-12-02 18:58:59,412 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:59,412 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:58:59,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:58:59,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:58:59,613 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:59,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1358969023, now seen corresponding path program 10 times [2023-12-02 18:58:59,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:59,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203900331] [2023-12-02 18:58:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:59,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-12-02 18:59:27,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:27,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203900331] [2023-12-02 18:59:27,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203900331] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:59:27,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665426450] [2023-12-02 18:59:27,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:59:27,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:59:27,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:59:27,308 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:59:27,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:59:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:28,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 4182 conjuncts, 202 conjunts are in the unsatisfiable core [2023-12-02 18:59:28,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:59:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-12-02 18:59:28,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:00:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-12-02 19:00:05,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665426450] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:00:05,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [333363393] [2023-12-02 19:00:05,855 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 19:00:05,855 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:00:05,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:00:05,856 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:00:05,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:00:06,555 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:00:29,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15779#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|)) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-12-02 19:00:29,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:00:29,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:00:29,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2023-12-02 19:00:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939141584] [2023-12-02 19:00:29,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:00:29,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-12-02 19:00:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:00:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-12-02 19:00:29,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2023-12-02 19:00:29,961 INFO L87 Difference]: Start difference. First operand 391 states and 400 transitions. Second operand has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:00:32,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:00:32,820 INFO L93 Difference]: Finished difference Result 782 states and 1001 transitions. [2023-12-02 19:00:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-12-02 19:00:32,821 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 389 [2023-12-02 19:00:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:00:32,824 INFO L225 Difference]: With dead ends: 782 [2023-12-02 19:00:32,824 INFO L226 Difference]: Without dead ends: 593 [2023-12-02 19:00:32,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 844 SyntacticMatches, 115 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73160 ImplicationChecksByTransitivity, 72.8s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2023-12-02 19:00:32,831 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:00:32,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:00:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-12-02 19:00:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2023-12-02 19:00:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.0168918918918919) internal successors, (602), 592 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:00:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 602 transitions. [2023-12-02 19:00:32,850 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 602 transitions. Word has length 389 [2023-12-02 19:00:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:00:32,851 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 602 transitions. [2023-12-02 19:00:32,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:00:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 602 transitions. [2023-12-02 19:00:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2023-12-02 19:00:32,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:00:32,854 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:00:32,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 19:00:33,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:00:33,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:00:33,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:00:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash -83991583, now seen corresponding path program 11 times [2023-12-02 19:00:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:00:33,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544375732] [2023-12-02 19:00:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:00:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:00:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:02:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 83027 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-12-02 19:02:23,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:02:23,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544375732] [2023-12-02 19:02:23,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544375732] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:02:23,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377350211] [2023-12-02 19:02:23,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:02:23,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:02:23,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:02:23,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:02:23,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba1ab6ce-5f3b-42f9-8de9-62fa9536b2cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process