./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ --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 2f774b3e755d7b6f786f7d23823d008ce09be620750647481355094233fd1ac8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:13:48,642 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:13:48,734 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:13:48,740 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:13:48,741 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:13:48,814 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:13:48,815 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:13:48,815 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:13:48,816 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:13:48,824 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:13:48,824 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:13:48,825 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:13:48,825 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:13:48,827 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:13:48,828 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:13:48,828 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:13:48,829 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:13:48,829 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:13:48,830 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:13:48,830 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:13:48,830 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:13:48,831 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:13:48,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:13:48,833 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:13:48,833 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:13:48,834 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:13:48,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:13:48,835 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:13:48,835 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:13:48,836 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:13:48,837 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:13:48,837 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:13:48,837 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:13:48,838 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:13:48,838 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:13:48,838 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:13:48,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:13:48,839 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:13:48,839 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:13:48,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:13:48,840 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:13:48,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:13:48,840 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:13:48,840 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:13:48,841 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:13:48,841 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_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f774b3e755d7b6f786f7d23823d008ce09be620750647481355094233fd1ac8 [2023-11-19 05:13:49,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:13:49,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:13:49,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:13:49,127 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:13:49,130 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:13:49,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-11-19 05:13:52,463 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:13:52,825 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:13:52,825 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-11-19 05:13:52,842 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/data/6645779eb/4a169e72b7324ec99b643a00fb50e6cd/FLAGb1c44fe12 [2023-11-19 05:13:52,859 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/data/6645779eb/4a169e72b7324ec99b643a00fb50e6cd [2023-11-19 05:13:52,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:13:52,872 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:13:52,875 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:52,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:13:52,883 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:13:52,884 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:52" (1/1) ... [2023-11-19 05:13:52,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2072b146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:52, skipping insertion in model container [2023-11-19 05:13:52,885 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:52" (1/1) ... [2023-11-19 05:13:52,945 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:13:53,189 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_d1db5824-bc5f-4bd6-a80f-53b925bd665c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2023-11-19 05:13:53,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:53,272 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:13:53,360 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_d1db5824-bc5f-4bd6-a80f-53b925bd665c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2023-11-19 05:13:53,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:53,479 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:13:53,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53 WrapperNode [2023-11-19 05:13:53,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:53,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:53,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:13:53,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:13:53,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,507 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,555 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 620 [2023-11-19 05:13:53,555 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:53,556 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:13:53,556 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:13:53,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:13:53,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,571 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,571 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,594 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,597 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,618 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:13:53,619 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:13:53,620 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:13:53,620 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:13:53,621 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (1/1) ... [2023-11-19 05:13:53,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:13:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:53,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:13:53,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:13:53,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:13:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:13:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:13:53,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:13:53,861 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:13:53,863 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:13:54,564 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:13:54,769 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:13:54,769 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:13:54,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:54 BoogieIcfgContainer [2023-11-19 05:13:54,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:13:54,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:13:54,782 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:13:54,786 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:13:54,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:13:52" (1/3) ... [2023-11-19 05:13:54,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c45510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:54, skipping insertion in model container [2023-11-19 05:13:54,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:53" (2/3) ... [2023-11-19 05:13:54,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c45510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:54, skipping insertion in model container [2023-11-19 05:13:54,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:54" (3/3) ... [2023-11-19 05:13:54,794 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-11-19 05:13:54,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:13:54,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:13:54,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:13:54,880 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;@6b9fbb50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:13:54,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:13:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 105 states have (on average 1.6952380952380952) internal successors, (178), 106 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 05:13:54,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:54,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:54,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:54,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash 102892927, now seen corresponding path program 1 times [2023-11-19 05:13:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284220978] [2023-11-19 05:13:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:55,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:55,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284220978] [2023-11-19 05:13:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284220978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:55,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:55,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:13:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049692499] [2023-11-19 05:13:55,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:55,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:13:55,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:55,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:13:55,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:13:55,653 INFO L87 Difference]: Start difference. First operand has 107 states, 105 states have (on average 1.6952380952380952) internal successors, (178), 106 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:55,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:55,817 INFO L93 Difference]: Finished difference Result 294 states and 469 transitions. [2023-11-19 05:13:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:13:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-19 05:13:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:55,830 INFO L225 Difference]: With dead ends: 294 [2023-11-19 05:13:55,831 INFO L226 Difference]: Without dead ends: 220 [2023-11-19 05:13:55,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:13:55,838 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 350 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:55,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 435 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-19 05:13:55,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2023-11-19 05:13:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3488372093023255) internal successors, (290), 215 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 290 transitions. [2023-11-19 05:13:55,889 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 290 transitions. Word has length 42 [2023-11-19 05:13:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:55,890 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 290 transitions. [2023-11-19 05:13:55,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 290 transitions. [2023-11-19 05:13:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:13:55,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:55,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:55,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:13:55,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:55,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1576605676, now seen corresponding path program 1 times [2023-11-19 05:13:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:55,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565802334] [2023-11-19 05:13:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:56,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:56,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565802334] [2023-11-19 05:13:56,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565802334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:56,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:56,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:13:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541174321] [2023-11-19 05:13:56,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:56,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:13:56,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:13:56,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:13:56,124 INFO L87 Difference]: Start difference. First operand 216 states and 290 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:56,381 INFO L93 Difference]: Finished difference Result 487 states and 669 transitions. [2023-11-19 05:13:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:13:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-19 05:13:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:56,385 INFO L225 Difference]: With dead ends: 487 [2023-11-19 05:13:56,386 INFO L226 Difference]: Without dead ends: 310 [2023-11-19 05:13:56,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:13:56,389 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 346 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:56,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 155 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:13:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-19 05:13:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2023-11-19 05:13:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3648208469055374) internal successors, (419), 307 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 419 transitions. [2023-11-19 05:13:56,412 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 419 transitions. Word has length 43 [2023-11-19 05:13:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:56,413 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 419 transitions. [2023-11-19 05:13:56,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 419 transitions. [2023-11-19 05:13:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:13:56,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:56,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:56,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:13:56,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:56,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1069135709, now seen corresponding path program 1 times [2023-11-19 05:13:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:56,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938097282] [2023-11-19 05:13:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:56,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:56,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:56,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938097282] [2023-11-19 05:13:56,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938097282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:56,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:56,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:13:56,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953329796] [2023-11-19 05:13:56,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:56,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:13:56,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:13:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:13:56,570 INFO L87 Difference]: Start difference. First operand 308 states and 419 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:56,740 INFO L93 Difference]: Finished difference Result 743 states and 1035 transitions. [2023-11-19 05:13:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:13:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-19 05:13:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:56,744 INFO L225 Difference]: With dead ends: 743 [2023-11-19 05:13:56,745 INFO L226 Difference]: Without dead ends: 494 [2023-11-19 05:13:56,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:13:56,748 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 329 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:56,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 163 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-11-19 05:13:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 492. [2023-11-19 05:13:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.3808553971486761) internal successors, (678), 491 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 678 transitions. [2023-11-19 05:13:56,769 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 678 transitions. Word has length 43 [2023-11-19 05:13:56,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:56,770 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 678 transitions. [2023-11-19 05:13:56,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 678 transitions. [2023-11-19 05:13:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:13:56,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:56,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:56,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:13:56,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:56,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:56,774 INFO L85 PathProgramCache]: Analyzing trace with hash -794613547, now seen corresponding path program 1 times [2023-11-19 05:13:56,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:56,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90561661] [2023-11-19 05:13:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:56,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:56,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:56,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90561661] [2023-11-19 05:13:56,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90561661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:56,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:56,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:13:56,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444415847] [2023-11-19 05:13:56,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:56,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:13:56,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:56,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:13:56,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:13:56,896 INFO L87 Difference]: Start difference. First operand 492 states and 678 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:57,014 INFO L93 Difference]: Finished difference Result 950 states and 1318 transitions. [2023-11-19 05:13:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:13:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-19 05:13:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:57,018 INFO L225 Difference]: With dead ends: 950 [2023-11-19 05:13:57,018 INFO L226 Difference]: Without dead ends: 492 [2023-11-19 05:13:57,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:13:57,031 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 291 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:57,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 125 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-11-19 05:13:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2023-11-19 05:13:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.3788187372708758) internal successors, (677), 491 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 677 transitions. [2023-11-19 05:13:57,048 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 677 transitions. Word has length 44 [2023-11-19 05:13:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:57,048 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 677 transitions. [2023-11-19 05:13:57,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 677 transitions. [2023-11-19 05:13:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:13:57,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:57,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:13:57,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:57,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1799207693, now seen corresponding path program 1 times [2023-11-19 05:13:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:57,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342350358] [2023-11-19 05:13:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:57,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:57,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342350358] [2023-11-19 05:13:57,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342350358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:57,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:57,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 05:13:57,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651036872] [2023-11-19 05:13:57,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:57,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 05:13:57,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:57,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 05:13:57,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:13:57,532 INFO L87 Difference]: Start difference. First operand 492 states and 677 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:58,115 INFO L93 Difference]: Finished difference Result 1351 states and 1885 transitions. [2023-11-19 05:13:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:13:58,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-19 05:13:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:58,125 INFO L225 Difference]: With dead ends: 1351 [2023-11-19 05:13:58,125 INFO L226 Difference]: Without dead ends: 1139 [2023-11-19 05:13:58,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:13:58,128 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1050 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:58,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 614 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:13:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2023-11-19 05:13:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 772. [2023-11-19 05:13:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.3670557717250325) internal successors, (1054), 771 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1054 transitions. [2023-11-19 05:13:58,155 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1054 transitions. Word has length 44 [2023-11-19 05:13:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:58,156 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1054 transitions. [2023-11-19 05:13:58,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1054 transitions. [2023-11-19 05:13:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:13:58,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:58,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:58,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:13:58,159 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:58,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash 195944659, now seen corresponding path program 1 times [2023-11-19 05:13:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:58,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702085135] [2023-11-19 05:13:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:58,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:58,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702085135] [2023-11-19 05:13:58,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702085135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:58,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:58,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 05:13:58,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055307407] [2023-11-19 05:13:58,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:58,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 05:13:58,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:58,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 05:13:58,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:13:58,727 INFO L87 Difference]: Start difference. First operand 772 states and 1054 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:59,787 INFO L93 Difference]: Finished difference Result 1381 states and 1882 transitions. [2023-11-19 05:13:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 05:13:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-19 05:13:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:59,795 INFO L225 Difference]: With dead ends: 1381 [2023-11-19 05:13:59,795 INFO L226 Difference]: Without dead ends: 1307 [2023-11-19 05:13:59,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2023-11-19 05:13:59,797 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 913 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:59,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 1036 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:13:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2023-11-19 05:13:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1057. [2023-11-19 05:13:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 1.3579545454545454) internal successors, (1434), 1056 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1434 transitions. [2023-11-19 05:13:59,827 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1434 transitions. Word has length 44 [2023-11-19 05:13:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:59,828 INFO L495 AbstractCegarLoop]: Abstraction has 1057 states and 1434 transitions. [2023-11-19 05:13:59,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1434 transitions. [2023-11-19 05:13:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:13:59,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:59,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:59,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:13:59,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:59,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1532498947, now seen corresponding path program 1 times [2023-11-19 05:13:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:59,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285796472] [2023-11-19 05:13:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:00,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:00,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285796472] [2023-11-19 05:14:00,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285796472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:00,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:00,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 05:14:00,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201477189] [2023-11-19 05:14:00,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:00,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 05:14:00,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 05:14:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:14:00,278 INFO L87 Difference]: Start difference. First operand 1057 states and 1434 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:00,854 INFO L93 Difference]: Finished difference Result 3134 states and 4415 transitions. [2023-11-19 05:14:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 05:14:00,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-19 05:14:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:00,871 INFO L225 Difference]: With dead ends: 3134 [2023-11-19 05:14:00,871 INFO L226 Difference]: Without dead ends: 2764 [2023-11-19 05:14:00,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:14:00,873 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 1229 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:00,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1229 Valid, 616 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:14:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2023-11-19 05:14:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 1964. [2023-11-19 05:14:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 1.3744268976057055) internal successors, (2698), 1963 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2698 transitions. [2023-11-19 05:14:00,957 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2698 transitions. Word has length 45 [2023-11-19 05:14:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:00,958 INFO L495 AbstractCegarLoop]: Abstraction has 1964 states and 2698 transitions. [2023-11-19 05:14:00,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2698 transitions. [2023-11-19 05:14:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:14:00,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:00,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:00,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:14:00,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:00,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:00,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1933316935, now seen corresponding path program 1 times [2023-11-19 05:14:00,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:00,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322074814] [2023-11-19 05:14:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:00,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:01,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322074814] [2023-11-19 05:14:01,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322074814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:01,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:01,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 05:14:01,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315481142] [2023-11-19 05:14:01,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 05:14:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 05:14:01,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:14:01,739 INFO L87 Difference]: Start difference. First operand 1964 states and 2698 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:03,058 INFO L93 Difference]: Finished difference Result 4416 states and 6093 transitions. [2023-11-19 05:14:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 05:14:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-19 05:14:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:03,083 INFO L225 Difference]: With dead ends: 4416 [2023-11-19 05:14:03,083 INFO L226 Difference]: Without dead ends: 4348 [2023-11-19 05:14:03,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=559, Unknown=0, NotChecked=0, Total=812 [2023-11-19 05:14:03,086 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 791 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:03,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 953 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:14:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4348 states. [2023-11-19 05:14:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4348 to 1976. [2023-11-19 05:14:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 1.3721518987341772) internal successors, (2710), 1975 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 2710 transitions. [2023-11-19 05:14:03,162 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 2710 transitions. Word has length 46 [2023-11-19 05:14:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:03,163 INFO L495 AbstractCegarLoop]: Abstraction has 1976 states and 2710 transitions. [2023-11-19 05:14:03,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 2710 transitions. [2023-11-19 05:14:03,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:14:03,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:03,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:03,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:14:03,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:03,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1957610103, now seen corresponding path program 1 times [2023-11-19 05:14:03,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:03,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125292558] [2023-11-19 05:14:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:03,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:03,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:03,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125292558] [2023-11-19 05:14:03,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125292558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:03,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:03,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 05:14:03,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767820862] [2023-11-19 05:14:03,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:03,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 05:14:03,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:03,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 05:14:03,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:14:03,746 INFO L87 Difference]: Start difference. First operand 1976 states and 2710 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:04,325 INFO L93 Difference]: Finished difference Result 4488 states and 6203 transitions. [2023-11-19 05:14:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 05:14:04,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-19 05:14:04,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:04,349 INFO L225 Difference]: With dead ends: 4488 [2023-11-19 05:14:04,349 INFO L226 Difference]: Without dead ends: 4084 [2023-11-19 05:14:04,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2023-11-19 05:14:04,354 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 532 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:04,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1133 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:14:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2023-11-19 05:14:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 2789. [2023-11-19 05:14:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 1.3784074605451937) internal successors, (3843), 2788 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 3843 transitions. [2023-11-19 05:14:04,457 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 3843 transitions. Word has length 47 [2023-11-19 05:14:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:04,457 INFO L495 AbstractCegarLoop]: Abstraction has 2789 states and 3843 transitions. [2023-11-19 05:14:04,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 3843 transitions. [2023-11-19 05:14:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:14:04,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:04,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:14:04,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:04,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash -342204841, now seen corresponding path program 1 times [2023-11-19 05:14:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:04,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907916087] [2023-11-19 05:14:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:04,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:05,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907916087] [2023-11-19 05:14:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907916087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:05,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:05,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 05:14:05,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049325288] [2023-11-19 05:14:05,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:05,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 05:14:05,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:05,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 05:14:05,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:14:05,054 INFO L87 Difference]: Start difference. First operand 2789 states and 3843 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:05,560 INFO L93 Difference]: Finished difference Result 4222 states and 5823 transitions. [2023-11-19 05:14:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 05:14:05,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-19 05:14:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:05,591 INFO L225 Difference]: With dead ends: 4222 [2023-11-19 05:14:05,591 INFO L226 Difference]: Without dead ends: 3852 [2023-11-19 05:14:05,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2023-11-19 05:14:05,595 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 335 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:05,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 815 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:14:05,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3852 states. [2023-11-19 05:14:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3852 to 2801. [2023-11-19 05:14:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2800 states have (on average 1.3767857142857143) internal successors, (3855), 2800 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 3855 transitions. [2023-11-19 05:14:05,728 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 3855 transitions. Word has length 47 [2023-11-19 05:14:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:05,728 INFO L495 AbstractCegarLoop]: Abstraction has 2801 states and 3855 transitions. [2023-11-19 05:14:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 3855 transitions. [2023-11-19 05:14:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:14:05,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:05,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:05,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:14:05,730 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:05,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash -64186630, now seen corresponding path program 1 times [2023-11-19 05:14:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:05,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046854713] [2023-11-19 05:14:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:05,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:05,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046854713] [2023-11-19 05:14:05,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046854713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:05,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:05,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:05,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272444434] [2023-11-19 05:14:05,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:05,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:05,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:05,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:05,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:05,787 INFO L87 Difference]: Start difference. First operand 2801 states and 3855 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:05,856 INFO L93 Difference]: Finished difference Result 4945 states and 6864 transitions. [2023-11-19 05:14:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:05,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-19 05:14:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:05,871 INFO L225 Difference]: With dead ends: 4945 [2023-11-19 05:14:05,871 INFO L226 Difference]: Without dead ends: 2714 [2023-11-19 05:14:05,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:05,875 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 70 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:05,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 230 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2023-11-19 05:14:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2650. [2023-11-19 05:14:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2650 states, 2649 states have (on average 1.3744809362023405) internal successors, (3641), 2649 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 3641 transitions. [2023-11-19 05:14:05,954 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 3641 transitions. Word has length 47 [2023-11-19 05:14:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:05,954 INFO L495 AbstractCegarLoop]: Abstraction has 2650 states and 3641 transitions. [2023-11-19 05:14:05,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 3641 transitions. [2023-11-19 05:14:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:14:05,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:05,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:05,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:14:05,956 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:05,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1970918043, now seen corresponding path program 1 times [2023-11-19 05:14:05,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:05,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718692345] [2023-11-19 05:14:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:05,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:06,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:06,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718692345] [2023-11-19 05:14:06,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718692345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:06,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:06,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:06,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480346602] [2023-11-19 05:14:06,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:06,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:06,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:06,010 INFO L87 Difference]: Start difference. First operand 2650 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:06,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:06,077 INFO L93 Difference]: Finished difference Result 4534 states and 6279 transitions. [2023-11-19 05:14:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-19 05:14:06,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:06,090 INFO L225 Difference]: With dead ends: 4534 [2023-11-19 05:14:06,091 INFO L226 Difference]: Without dead ends: 2331 [2023-11-19 05:14:06,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:06,094 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 71 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:06,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 222 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2023-11-19 05:14:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2328. [2023-11-19 05:14:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 1.3712935109583155) internal successors, (3191), 2327 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 3191 transitions. [2023-11-19 05:14:06,165 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 3191 transitions. Word has length 47 [2023-11-19 05:14:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:06,166 INFO L495 AbstractCegarLoop]: Abstraction has 2328 states and 3191 transitions. [2023-11-19 05:14:06,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 3191 transitions. [2023-11-19 05:14:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:14:06,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:06,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:06,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 05:14:06,168 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:06,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash 167722955, now seen corresponding path program 1 times [2023-11-19 05:14:06,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:06,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954270613] [2023-11-19 05:14:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:06,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:10,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:10,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954270613] [2023-11-19 05:14:10,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954270613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:10,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:10,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-11-19 05:14:10,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772189422] [2023-11-19 05:14:10,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:10,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 05:14:10,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 05:14:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-11-19 05:14:10,272 INFO L87 Difference]: Start difference. First operand 2328 states and 3191 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:15,456 INFO L93 Difference]: Finished difference Result 3106 states and 4249 transitions. [2023-11-19 05:14:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 05:14:15,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-19 05:14:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:15,485 INFO L225 Difference]: With dead ends: 3106 [2023-11-19 05:14:15,490 INFO L226 Difference]: Without dead ends: 3042 [2023-11-19 05:14:15,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=494, Invalid=1486, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 05:14:15,494 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 542 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:15,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1641 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 05:14:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2023-11-19 05:14:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2316. [2023-11-19 05:14:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.3727861771058316) internal successors, (3178), 2315 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3178 transitions. [2023-11-19 05:14:15,616 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3178 transitions. Word has length 49 [2023-11-19 05:14:15,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:15,617 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 3178 transitions. [2023-11-19 05:14:15,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3178 transitions. [2023-11-19 05:14:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 05:14:15,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:15,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:15,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 05:14:15,619 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:15,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1679079827, now seen corresponding path program 1 times [2023-11-19 05:14:15,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:15,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109394025] [2023-11-19 05:14:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:15,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:15,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:15,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109394025] [2023-11-19 05:14:15,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109394025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:15,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:15,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:15,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949792738] [2023-11-19 05:14:15,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:15,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:15,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:15,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:15,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:15,757 INFO L87 Difference]: Start difference. First operand 2316 states and 3178 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:15,810 INFO L93 Difference]: Finished difference Result 4747 states and 6560 transitions. [2023-11-19 05:14:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-19 05:14:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:15,818 INFO L225 Difference]: With dead ends: 4747 [2023-11-19 05:14:15,818 INFO L226 Difference]: Without dead ends: 3201 [2023-11-19 05:14:15,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:15,821 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 65 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:15,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 262 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2023-11-19 05:14:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2979. [2023-11-19 05:14:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2978 states have (on average 1.3609805238415045) internal successors, (4053), 2978 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 4053 transitions. [2023-11-19 05:14:15,888 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 4053 transitions. Word has length 54 [2023-11-19 05:14:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:15,888 INFO L495 AbstractCegarLoop]: Abstraction has 2979 states and 4053 transitions. [2023-11-19 05:14:15,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 4053 transitions. [2023-11-19 05:14:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 05:14:15,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:15,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:15,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 05:14:15,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:15,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2132365901, now seen corresponding path program 1 times [2023-11-19 05:14:15,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:15,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465071584] [2023-11-19 05:14:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:16,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:16,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465071584] [2023-11-19 05:14:16,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465071584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:16,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:16,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:16,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637024287] [2023-11-19 05:14:16,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:16,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:16,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:16,015 INFO L87 Difference]: Start difference. First operand 2979 states and 4053 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:16,061 INFO L93 Difference]: Finished difference Result 5946 states and 8124 transitions. [2023-11-19 05:14:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:16,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-19 05:14:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:16,075 INFO L225 Difference]: With dead ends: 5946 [2023-11-19 05:14:16,076 INFO L226 Difference]: Without dead ends: 3740 [2023-11-19 05:14:16,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:16,081 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 62 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:16,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 244 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2023-11-19 05:14:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3428. [2023-11-19 05:14:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 1.3472424861394805) internal successors, (4617), 3427 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 4617 transitions. [2023-11-19 05:14:16,179 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 4617 transitions. Word has length 56 [2023-11-19 05:14:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:16,180 INFO L495 AbstractCegarLoop]: Abstraction has 3428 states and 4617 transitions. [2023-11-19 05:14:16,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 4617 transitions. [2023-11-19 05:14:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 05:14:16,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:16,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:16,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 05:14:16,187 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:16,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 846093606, now seen corresponding path program 1 times [2023-11-19 05:14:16,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:16,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677889392] [2023-11-19 05:14:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:16,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:16,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:16,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677889392] [2023-11-19 05:14:16,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677889392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:16,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:16,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:16,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490653955] [2023-11-19 05:14:16,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:16,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:16,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:16,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:16,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:16,255 INFO L87 Difference]: Start difference. First operand 3428 states and 4617 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:16,298 INFO L93 Difference]: Finished difference Result 4769 states and 6428 transitions. [2023-11-19 05:14:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-19 05:14:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:16,306 INFO L225 Difference]: With dead ends: 4769 [2023-11-19 05:14:16,306 INFO L226 Difference]: Without dead ends: 3772 [2023-11-19 05:14:16,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:16,309 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 58 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:16,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 248 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2023-11-19 05:14:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3705. [2023-11-19 05:14:16,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3704 states have (on average 1.3393628509719222) internal successors, (4961), 3704 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 4961 transitions. [2023-11-19 05:14:16,424 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 4961 transitions. Word has length 59 [2023-11-19 05:14:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:16,425 INFO L495 AbstractCegarLoop]: Abstraction has 3705 states and 4961 transitions. [2023-11-19 05:14:16,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 4961 transitions. [2023-11-19 05:14:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 05:14:16,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:16,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:16,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 05:14:16,427 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:16,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1494975814, now seen corresponding path program 1 times [2023-11-19 05:14:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:16,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257826384] [2023-11-19 05:14:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:16,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:16,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:16,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257826384] [2023-11-19 05:14:16,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257826384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:16,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:16,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:16,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564104367] [2023-11-19 05:14:16,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:16,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:16,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:16,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:16,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:16,564 INFO L87 Difference]: Start difference. First operand 3705 states and 4961 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:16,627 INFO L93 Difference]: Finished difference Result 8244 states and 11096 transitions. [2023-11-19 05:14:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-19 05:14:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:16,637 INFO L225 Difference]: With dead ends: 8244 [2023-11-19 05:14:16,637 INFO L226 Difference]: Without dead ends: 4879 [2023-11-19 05:14:16,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:16,642 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 57 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:16,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 225 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2023-11-19 05:14:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4491. [2023-11-19 05:14:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 4490 states have (on average 1.3251670378619154) internal successors, (5950), 4490 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 5950 transitions. [2023-11-19 05:14:16,738 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 5950 transitions. Word has length 59 [2023-11-19 05:14:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:16,738 INFO L495 AbstractCegarLoop]: Abstraction has 4491 states and 5950 transitions. [2023-11-19 05:14:16,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 5950 transitions. [2023-11-19 05:14:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 05:14:16,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:16,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:16,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 05:14:16,741 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:16,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash -807262722, now seen corresponding path program 1 times [2023-11-19 05:14:16,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:16,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16354779] [2023-11-19 05:14:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:17,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:17,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16354779] [2023-11-19 05:14:17,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16354779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:17,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:17,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:14:17,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724360243] [2023-11-19 05:14:17,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:17,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:14:17,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:14:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:14:17,028 INFO L87 Difference]: Start difference. First operand 4491 states and 5950 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:17,155 INFO L93 Difference]: Finished difference Result 6035 states and 7956 transitions. [2023-11-19 05:14:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:14:17,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-19 05:14:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:17,167 INFO L225 Difference]: With dead ends: 6035 [2023-11-19 05:14:17,167 INFO L226 Difference]: Without dead ends: 6033 [2023-11-19 05:14:17,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:14:17,170 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 268 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:17,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 671 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6033 states. [2023-11-19 05:14:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6033 to 5251. [2023-11-19 05:14:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5251 states, 5250 states have (on average 1.3224761904761906) internal successors, (6943), 5250 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5251 states to 5251 states and 6943 transitions. [2023-11-19 05:14:17,344 INFO L78 Accepts]: Start accepts. Automaton has 5251 states and 6943 transitions. Word has length 64 [2023-11-19 05:14:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:17,345 INFO L495 AbstractCegarLoop]: Abstraction has 5251 states and 6943 transitions. [2023-11-19 05:14:17,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 5251 states and 6943 transitions. [2023-11-19 05:14:17,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 05:14:17,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:17,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 05:14:17,349 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:17,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1377501983, now seen corresponding path program 1 times [2023-11-19 05:14:17,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:17,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770042879] [2023-11-19 05:14:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:17,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:18,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:18,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770042879] [2023-11-19 05:14:18,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770042879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:18,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196428150] [2023-11-19 05:14:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:18,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:18,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:18,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1db5824-bc5f-4bd6-a80f-53b925bd665c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:14:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:18,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-19 05:14:18,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:20,741 INFO L327 TraceCheckSpWp]: Computing backward predicates...