./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91 --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 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:09:58,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:09:58,854 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:09:58,858 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:09:58,859 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:09:58,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:09:58,883 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:09:58,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:09:58,884 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:09:58,885 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:09:58,885 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:09:58,886 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:09:58,886 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:09:58,887 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:09:58,887 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:09:58,888 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:09:58,888 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:09:58,889 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:09:58,889 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:09:58,890 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:09:58,890 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:09:58,891 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:09:58,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:09:58,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:09:58,893 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:09:58,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:09:58,893 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:09:58,894 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:09:58,894 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:09:58,895 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:09:58,895 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:09:58,896 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:09:58,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:09:58,896 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:09:58,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:09:58,897 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:09:58,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:09:58,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:09:58,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:09:58,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:09:58,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:09:58,903 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:09:58,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:09:58,904 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:09:58,904 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:09:58,905 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:09:58,905 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:09:58,905 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_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 [2023-11-25 00:09:59,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:09:59,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:09:59,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:09:59,226 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:09:59,227 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:09:59,228 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2023-11-25 00:10:02,368 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:10:02,749 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:10:02,752 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2023-11-25 00:10:02,770 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/data/2754da7bb/538ba90fb23845fda88dec5b68ba5426/FLAG280de0088 [2023-11-25 00:10:02,788 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/data/2754da7bb/538ba90fb23845fda88dec5b68ba5426 [2023-11-25 00:10:02,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:10:02,793 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:10:02,797 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:10:02,797 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:10:02,804 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:10:02,805 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d250086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02, skipping insertion in model container [2023-11-25 00:10:02,807 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,885 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:10:03,192 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_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2023-11-25 00:10:03,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:10:03,210 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:10:03,286 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_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2023-11-25 00:10:03,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:10:03,307 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:10:03,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03 WrapperNode [2023-11-25 00:10:03,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:10:03,309 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:10:03,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:10:03,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:10:03,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,354 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,416 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 500 [2023-11-25 00:10:03,422 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:10:03,423 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:10:03,424 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:10:03,424 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:10:03,437 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,438 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,444 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,462 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,470 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,479 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:10:03,488 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:10:03,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:10:03,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:10:03,489 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (1/1) ... [2023-11-25 00:10:03,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:10:03,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:03,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:10:03,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:10:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-11-25 00:10:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-11-25 00:10:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:10:03,644 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-11-25 00:10:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-11-25 00:10:03,645 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-11-25 00:10:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-11-25 00:10:03,645 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-11-25 00:10:03,646 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-11-25 00:10:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:10:03,646 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:10:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:10:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-11-25 00:10:03,647 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-11-25 00:10:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:10:03,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:10:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-11-25 00:10:03,649 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-11-25 00:10:03,831 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:10:03,833 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:10:04,485 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:10:04,731 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:10:04,732 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:10:04,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:10:04 BoogieIcfgContainer [2023-11-25 00:10:04,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:10:04,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:10:04,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:10:04,743 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:10:04,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:10:02" (1/3) ... [2023-11-25 00:10:04,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3151ef99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:10:04, skipping insertion in model container [2023-11-25 00:10:04,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:03" (2/3) ... [2023-11-25 00:10:04,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3151ef99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:10:04, skipping insertion in model container [2023-11-25 00:10:04,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:10:04" (3/3) ... [2023-11-25 00:10:04,747 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2023-11-25 00:10:04,770 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:10:04,770 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:10:04,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:10:04,861 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;@3847cfd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:10:04,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:10:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-25 00:10:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-25 00:10:04,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:04,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:04,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:04,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 40747137, now seen corresponding path program 1 times [2023-11-25 00:10:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:04,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353191573] [2023-11-25 00:10:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:04,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:05,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:05,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353191573] [2023-11-25 00:10:05,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353191573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:05,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:05,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:10:05,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815264160] [2023-11-25 00:10:05,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:05,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:05,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:05,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:10:05,740 INFO L87 Difference]: Start difference. First operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:10:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:05,955 INFO L93 Difference]: Finished difference Result 301 states and 489 transitions. [2023-11-25 00:10:05,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:10:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-25 00:10:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:05,973 INFO L225 Difference]: With dead ends: 301 [2023-11-25 00:10:05,973 INFO L226 Difference]: Without dead ends: 153 [2023-11-25 00:10:05,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:10:05,982 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 5 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:05,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 638 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:10:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-25 00:10:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-11-25 00:10:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 113 states have (on average 1.5044247787610618) internal successors, (170), 113 states have internal predecessors, (170), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-25 00:10:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2023-11-25 00:10:06,063 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 19 [2023-11-25 00:10:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:06,064 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2023-11-25 00:10:06,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:10:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2023-11-25 00:10:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-25 00:10:06,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:06,067 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:06,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:10:06,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:06,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1970414766, now seen corresponding path program 1 times [2023-11-25 00:10:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:06,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663850243] [2023-11-25 00:10:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:06,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:06,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:06,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663850243] [2023-11-25 00:10:06,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663850243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:06,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:06,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:10:06,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171463960] [2023-11-25 00:10:06,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:10:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:06,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:10:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:10:06,240 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:06,470 INFO L93 Difference]: Finished difference Result 339 states and 514 transitions. [2023-11-25 00:10:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:10:06,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-11-25 00:10:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:06,500 INFO L225 Difference]: With dead ends: 339 [2023-11-25 00:10:06,501 INFO L226 Difference]: Without dead ends: 189 [2023-11-25 00:10:06,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:10:06,506 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 326 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:06,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 575 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:10:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-25 00:10:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2023-11-25 00:10:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5070422535211268) internal successors, (214), 142 states have internal predecessors, (214), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-25 00:10:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 282 transitions. [2023-11-25 00:10:06,562 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 282 transitions. Word has length 30 [2023-11-25 00:10:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:06,562 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 282 transitions. [2023-11-25 00:10:06,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 282 transitions. [2023-11-25 00:10:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-25 00:10:06,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:06,566 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:06,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:10:06,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:06,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:06,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1303988349, now seen corresponding path program 1 times [2023-11-25 00:10:06,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:06,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494903782] [2023-11-25 00:10:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:06,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:06,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:06,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494903782] [2023-11-25 00:10:06,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494903782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:06,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:06,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:10:06,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533317977] [2023-11-25 00:10:06,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:06,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:10:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:06,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:10:06,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:10:06,767 INFO L87 Difference]: Start difference. First operand 187 states and 282 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:06,951 INFO L93 Difference]: Finished difference Result 339 states and 512 transitions. [2023-11-25 00:10:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:10:06,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-11-25 00:10:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:06,956 INFO L225 Difference]: With dead ends: 339 [2023-11-25 00:10:06,956 INFO L226 Difference]: Without dead ends: 189 [2023-11-25 00:10:06,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:10:06,965 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 322 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:06,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 578 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:10:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-25 00:10:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2023-11-25 00:10:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5) internal successors, (213), 142 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-25 00:10:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 281 transitions. [2023-11-25 00:10:07,012 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 281 transitions. Word has length 31 [2023-11-25 00:10:07,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:07,013 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 281 transitions. [2023-11-25 00:10:07,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 281 transitions. [2023-11-25 00:10:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-25 00:10:07,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:07,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:07,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:10:07,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:07,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1186970131, now seen corresponding path program 1 times [2023-11-25 00:10:07,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:07,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646725327] [2023-11-25 00:10:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:07,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:07,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646725327] [2023-11-25 00:10:07,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646725327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:07,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:07,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:10:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922973718] [2023-11-25 00:10:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:07,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:10:07,271 INFO L87 Difference]: Start difference. First operand 187 states and 281 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:10:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:07,353 INFO L93 Difference]: Finished difference Result 342 states and 516 transitions. [2023-11-25 00:10:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:10:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-25 00:10:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:07,357 INFO L225 Difference]: With dead ends: 342 [2023-11-25 00:10:07,357 INFO L226 Difference]: Without dead ends: 192 [2023-11-25 00:10:07,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:10:07,368 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 6 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:07,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 650 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:10:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-25 00:10:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2023-11-25 00:10:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 146 states have (on average 1.4863013698630136) internal successors, (217), 146 states have internal predecessors, (217), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-25 00:10:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 285 transitions. [2023-11-25 00:10:07,403 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 285 transitions. Word has length 33 [2023-11-25 00:10:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:07,404 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 285 transitions. [2023-11-25 00:10:07,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:10:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 285 transitions. [2023-11-25 00:10:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-25 00:10:07,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:07,411 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:07,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:10:07,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:07,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:07,412 INFO L85 PathProgramCache]: Analyzing trace with hash -558969229, now seen corresponding path program 1 times [2023-11-25 00:10:07,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:07,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470866225] [2023-11-25 00:10:07,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:07,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:07,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:07,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470866225] [2023-11-25 00:10:07,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470866225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:07,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:07,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:10:07,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57782518] [2023-11-25 00:10:07,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:07,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:07,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:10:07,714 INFO L87 Difference]: Start difference. First operand 192 states and 285 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-25 00:10:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:07,797 INFO L93 Difference]: Finished difference Result 352 states and 527 transitions. [2023-11-25 00:10:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:10:07,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2023-11-25 00:10:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:07,800 INFO L225 Difference]: With dead ends: 352 [2023-11-25 00:10:07,800 INFO L226 Difference]: Without dead ends: 197 [2023-11-25 00:10:07,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:10:07,802 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 6 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:07,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 636 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:10:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-25 00:10:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-11-25 00:10:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 150 states have (on average 1.4733333333333334) internal successors, (221), 150 states have internal predecessors, (221), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-25 00:10:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2023-11-25 00:10:07,819 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 41 [2023-11-25 00:10:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:07,819 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2023-11-25 00:10:07,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-25 00:10:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2023-11-25 00:10:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-25 00:10:07,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:07,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:07,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:10:07,821 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:07,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:07,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1945352093, now seen corresponding path program 1 times [2023-11-25 00:10:07,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:07,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697230844] [2023-11-25 00:10:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:07,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:07,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:07,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697230844] [2023-11-25 00:10:07,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697230844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:07,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:07,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:10:07,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475507892] [2023-11-25 00:10:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:07,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:07,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:10:07,989 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:10:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:08,064 INFO L93 Difference]: Finished difference Result 361 states and 531 transitions. [2023-11-25 00:10:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:10:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2023-11-25 00:10:08,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:08,067 INFO L225 Difference]: With dead ends: 361 [2023-11-25 00:10:08,067 INFO L226 Difference]: Without dead ends: 201 [2023-11-25 00:10:08,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:10:08,069 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 5 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:08,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 645 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:10:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-25 00:10:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-11-25 00:10:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 153 states have internal predecessors, (224), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-25 00:10:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2023-11-25 00:10:08,086 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 49 [2023-11-25 00:10:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:08,086 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2023-11-25 00:10:08,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:10:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2023-11-25 00:10:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-25 00:10:08,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:08,088 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:08,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:10:08,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:08,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash 46844100, now seen corresponding path program 1 times [2023-11-25 00:10:08,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:08,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498979275] [2023-11-25 00:10:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:08,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:08,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:08,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498979275] [2023-11-25 00:10:08,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498979275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:08,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:08,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:10:08,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489745606] [2023-11-25 00:10:08,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:08,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:08,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:10:08,250 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:10:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:08,326 INFO L93 Difference]: Finished difference Result 370 states and 541 transitions. [2023-11-25 00:10:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:10:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2023-11-25 00:10:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:08,329 INFO L225 Difference]: With dead ends: 370 [2023-11-25 00:10:08,329 INFO L226 Difference]: Without dead ends: 206 [2023-11-25 00:10:08,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:10:08,331 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 6 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:08,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 636 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:10:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-25 00:10:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-25 00:10:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 157 states have (on average 1.4522292993630572) internal successors, (228), 157 states have internal predecessors, (228), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-25 00:10:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 296 transitions. [2023-11-25 00:10:08,348 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 296 transitions. Word has length 49 [2023-11-25 00:10:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:08,348 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 296 transitions. [2023-11-25 00:10:08,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:10:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 296 transitions. [2023-11-25 00:10:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-25 00:10:08,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:08,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:08,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:10:08,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:08,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1703784644, now seen corresponding path program 1 times [2023-11-25 00:10:08,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:08,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563301804] [2023-11-25 00:10:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:08,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-25 00:10:08,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:08,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563301804] [2023-11-25 00:10:08,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563301804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:08,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:08,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:10:08,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579305949] [2023-11-25 00:10:08,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:08,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:08,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:08,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:10:08,577 INFO L87 Difference]: Start difference. First operand 206 states and 296 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-25 00:10:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:08,662 INFO L93 Difference]: Finished difference Result 381 states and 548 transitions. [2023-11-25 00:10:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:10:08,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2023-11-25 00:10:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:08,665 INFO L225 Difference]: With dead ends: 381 [2023-11-25 00:10:08,665 INFO L226 Difference]: Without dead ends: 212 [2023-11-25 00:10:08,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:10:08,667 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 7 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:08,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 647 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:10:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-25 00:10:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-11-25 00:10:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 162 states have internal predecessors, (233), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-25 00:10:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 301 transitions. [2023-11-25 00:10:08,686 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 301 transitions. Word has length 57 [2023-11-25 00:10:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:08,687 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 301 transitions. [2023-11-25 00:10:08,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-25 00:10:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 301 transitions. [2023-11-25 00:10:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-25 00:10:08,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:08,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:08,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:10:08,690 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:08,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:08,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1951430269, now seen corresponding path program 1 times [2023-11-25 00:10:08,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:08,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242662814] [2023-11-25 00:10:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:08,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:09,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242662814] [2023-11-25 00:10:09,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242662814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:09,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381391081] [2023-11-25 00:10:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:09,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:09,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:09,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:10:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:09,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:10:09,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:10:10,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:10,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381391081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:10,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:10,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2023-11-25 00:10:10,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246758045] [2023-11-25 00:10:10,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:10,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:10:10,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:10,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:10:10,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:10:10,040 INFO L87 Difference]: Start difference. First operand 212 states and 301 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-25 00:10:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:10,410 INFO L93 Difference]: Finished difference Result 601 states and 839 transitions. [2023-11-25 00:10:10,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:10:10,411 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2023-11-25 00:10:10,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:10,415 INFO L225 Difference]: With dead ends: 601 [2023-11-25 00:10:10,415 INFO L226 Difference]: Without dead ends: 400 [2023-11-25 00:10:10,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-11-25 00:10:10,419 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 213 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:10,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1050 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:10:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-25 00:10:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 396. [2023-11-25 00:10:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 300 states have (on average 1.42) internal successors, (426), 301 states have internal predecessors, (426), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-25 00:10:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 556 transitions. [2023-11-25 00:10:10,458 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 556 transitions. Word has length 60 [2023-11-25 00:10:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:10,459 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 556 transitions. [2023-11-25 00:10:10,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-25 00:10:10,459 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 556 transitions. [2023-11-25 00:10:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-25 00:10:10,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:10,462 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:10,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:10,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:10,669 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:10,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:10,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2028707838, now seen corresponding path program 1 times [2023-11-25 00:10:10,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:10,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542213689] [2023-11-25 00:10:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:11,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:11,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542213689] [2023-11-25 00:10:11,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542213689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:11,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100647804] [2023-11-25 00:10:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:11,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:11,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:11,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:11,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:10:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:11,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-25 00:10:11,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:12,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:10:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:12,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100647804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:10:12,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306507611] [2023-11-25 00:10:12,402 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2023-11-25 00:10:12,402 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:10:12,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:10:12,412 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:10:12,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:10:22,275 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 134 for LOIs [2023-11-25 00:10:22,579 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2023-11-25 00:10:22,601 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-11-25 00:10:22,707 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:10:32,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1306507611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:32,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:10:32,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2023-11-25 00:10:32,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147330598] [2023-11-25 00:10:32,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:32,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-25 00:10:32,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:32,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-25 00:10:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2023-11-25 00:10:32,173 INFO L87 Difference]: Start difference. First operand 396 states and 556 transitions. Second operand has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-25 00:10:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:39,391 INFO L93 Difference]: Finished difference Result 886 states and 1232 transitions. [2023-11-25 00:10:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-25 00:10:39,392 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2023-11-25 00:10:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:39,398 INFO L225 Difference]: With dead ends: 886 [2023-11-25 00:10:39,398 INFO L226 Difference]: Without dead ends: 530 [2023-11-25 00:10:39,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2023-11-25 00:10:39,402 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 237 mSDsluCounter, 3754 mSDsCounter, 0 mSdLazyCounter, 2551 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 4040 SdHoareTripleChecker+Invalid, 2618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:39,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 4040 Invalid, 2618 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 2551 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-25 00:10:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2023-11-25 00:10:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 376. [2023-11-25 00:10:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 282 states have (on average 1.3794326241134751) internal successors, (389), 284 states have internal predecessors, (389), 63 states have call successors, (63), 30 states have call predecessors, (63), 30 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2023-11-25 00:10:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 515 transitions. [2023-11-25 00:10:39,499 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 515 transitions. Word has length 62 [2023-11-25 00:10:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:39,500 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 515 transitions. [2023-11-25 00:10:39,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-25 00:10:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 515 transitions. [2023-11-25 00:10:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-25 00:10:39,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:39,502 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:39,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-25 00:10:39,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:39,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:39,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1449694114, now seen corresponding path program 1 times [2023-11-25 00:10:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751184343] [2023-11-25 00:10:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:40,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:40,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751184343] [2023-11-25 00:10:40,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751184343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:40,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236794141] [2023-11-25 00:10:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:40,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:40,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e86f0d-aad3-43b6-b16f-12caaf9ec408/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:10:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:40,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-25 00:10:40,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:40,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:10:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:41,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236794141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:10:41,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098485849] [2023-11-25 00:10:41,060 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2023-11-25 00:10:41,060 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:10:41,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:10:41,060 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:10:41,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:10:47,511 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 134 for LOIs [2023-11-25 00:10:47,707 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 111 for LOIs [2023-11-25 00:10:47,720 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-11-25 00:10:47,790 INFO L180 IcfgInterpreter]: Interpretation finished