./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5 --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 afd688b49db4d2cf9e7e2109162780e9655a2ed2ed733e9c6c0c10bb8df3342c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:56:05,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:56:05,702 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 18:56:05,711 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:56:05,712 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:56:05,753 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:56:05,754 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:56:05,755 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:56:05,756 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:56:05,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:56:05,762 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:56:05,762 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:56:05,763 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:56:05,765 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:56:05,765 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:56:05,766 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:56:05,766 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:56:05,767 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:56:05,767 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:56:05,768 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:56:05,768 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:56:05,769 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:56:05,770 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:56:05,771 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 18:56:05,771 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:56:05,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:56:05,772 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:56:05,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:56:05,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 18:56:05,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:56:05,775 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 18:56:05,775 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:56:05,775 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 18:56:05,776 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:56:05,776 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:56:05,776 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:56:05,777 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:56:05,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:56:05,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:56:05,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:56:05,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 18:56:05,778 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:56:05,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:56:05,779 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:56:05,779 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 18:56:05,780 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:56:05,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:56:05,780 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_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afd688b49db4d2cf9e7e2109162780e9655a2ed2ed733e9c6c0c10bb8df3342c [2023-11-21 18:56:06,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:56:06,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:56:06,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:56:06,168 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:56:06,169 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:56:06,170 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-11-21 18:56:09,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:56:09,728 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:56:09,728 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-11-21 18:56:09,745 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/data/4b0a1fce1/8ae170011eb84bb0a441b99c46ed2024/FLAGe260fb5d6 [2023-11-21 18:56:09,760 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/data/4b0a1fce1/8ae170011eb84bb0a441b99c46ed2024 [2023-11-21 18:56:09,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:56:09,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:56:09,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:56:09,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:56:09,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:56:09,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:56:09" (1/1) ... [2023-11-21 18:56:09,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73505190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:09, skipping insertion in model container [2023-11-21 18:56:09,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:56:09" (1/1) ... [2023-11-21 18:56:09,834 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:56:10,294 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_619ad61b-60bd-4158-b430-129ea5e3946b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2023-11-21 18:56:10,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:56:10,434 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:56:10,549 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_619ad61b-60bd-4158-b430-129ea5e3946b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2023-11-21 18:56:10,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:56:10,630 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:56:10,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10 WrapperNode [2023-11-21 18:56:10,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:56:10,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:56:10,632 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:56:10,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:56:10,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,672 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,775 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1455 [2023-11-21 18:56:10,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:56:10,776 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:56:10,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:56:10,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:56:10,786 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,795 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,819 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,835 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,871 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:56:10,885 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:56:10,885 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:56:10,886 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:56:10,887 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (1/1) ... [2023-11-21 18:56:10,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:56:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:56:10,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:56:10,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_619ad61b-60bd-4158-b430-129ea5e3946b/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:56:10,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:56:10,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 18:56:10,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:56:10,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:56:11,142 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:56:11,145 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:56:12,517 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:56:13,052 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:56:13,052 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 18:56:13,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:56:13 BoogieIcfgContainer [2023-11-21 18:56:13,055 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:56:13,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:56:13,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:56:13,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:56:13,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:56:09" (1/3) ... [2023-11-21 18:56:13,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c48ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:56:13, skipping insertion in model container [2023-11-21 18:56:13,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:10" (2/3) ... [2023-11-21 18:56:13,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c48ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:56:13, skipping insertion in model container [2023-11-21 18:56:13,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:56:13" (3/3) ... [2023-11-21 18:56:13,068 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-11-21 18:56:13,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:56:13,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 18:56:13,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:56:13,181 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;@3bce65c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:56:13,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 18:56:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 324 states, 300 states have (on average 1.5866666666666667) internal successors, (476), 323 states have internal predecessors, (476), 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) [2023-11-21 18:56:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 18:56:13,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:13,225 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] [2023-11-21 18:56:13,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:13,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1572012492, now seen corresponding path program 1 times [2023-11-21 18:56:13,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:13,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859841667] [2023-11-21 18:56:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:13,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:14,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:14,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859841667] [2023-11-21 18:56:14,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859841667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:14,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:14,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:56:14,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642894289] [2023-11-21 18:56:14,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:14,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:56:14,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:14,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:56:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:56:14,142 INFO L87 Difference]: Start difference. First operand has 324 states, 300 states have (on average 1.5866666666666667) internal successors, (476), 323 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2023-11-21 18:56:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:14,472 INFO L93 Difference]: Finished difference Result 603 states and 905 transitions. [2023-11-21 18:56:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:56:14,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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 [2023-11-21 18:56:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:14,504 INFO L225 Difference]: With dead ends: 603 [2023-11-21 18:56:14,504 INFO L226 Difference]: Without dead ends: 300 [2023-11-21 18:56:14,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:56:14,519 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 85 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:14,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1216 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:56:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-21 18:56:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2023-11-21 18:56:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.471571906354515) internal successors, (440), 299 states have internal predecessors, (440), 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) [2023-11-21 18:56:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 440 transitions. [2023-11-21 18:56:14,600 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 440 transitions. Word has length 56 [2023-11-21 18:56:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:14,600 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 440 transitions. [2023-11-21 18:56:14,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2023-11-21 18:56:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 440 transitions. [2023-11-21 18:56:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-21 18:56:14,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:14,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:14,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 18:56:14,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:14,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1478231634, now seen corresponding path program 1 times [2023-11-21 18:56:14,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:14,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108702247] [2023-11-21 18:56:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:14,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:14,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:14,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108702247] [2023-11-21 18:56:14,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108702247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:14,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:14,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:14,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849935105] [2023-11-21 18:56:14,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:14,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:14,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:14,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:14,778 INFO L87 Difference]: Start difference. First operand 300 states and 440 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-11-21 18:56:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:14,949 INFO L93 Difference]: Finished difference Result 733 states and 1093 transitions. [2023-11-21 18:56:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2023-11-21 18:56:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:14,955 INFO L225 Difference]: With dead ends: 733 [2023-11-21 18:56:14,956 INFO L226 Difference]: Without dead ends: 473 [2023-11-21 18:56:14,963 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 [2023-11-21 18:56:14,967 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 338 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:14,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 712 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-11-21 18:56:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2023-11-21 18:56:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.4787234042553192) internal successors, (695), 470 states have internal predecessors, (695), 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) [2023-11-21 18:56:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 695 transitions. [2023-11-21 18:56:14,999 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 695 transitions. Word has length 79 [2023-11-21 18:56:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:15,000 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 695 transitions. [2023-11-21 18:56:15,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-11-21 18:56:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 695 transitions. [2023-11-21 18:56:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-21 18:56:15,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:15,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:15,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 18:56:15,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:15,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash -794695225, now seen corresponding path program 1 times [2023-11-21 18:56:15,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:15,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526383771] [2023-11-21 18:56:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:15,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:15,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:15,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526383771] [2023-11-21 18:56:15,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526383771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:15,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:15,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360065099] [2023-11-21 18:56:15,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:15,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:15,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:15,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:15,156 INFO L87 Difference]: Start difference. First operand 471 states and 695 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:15,295 INFO L93 Difference]: Finished difference Result 1174 states and 1749 transitions. [2023-11-21 18:56:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-11-21 18:56:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:15,300 INFO L225 Difference]: With dead ends: 1174 [2023-11-21 18:56:15,301 INFO L226 Difference]: Without dead ends: 756 [2023-11-21 18:56:15,302 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 [2023-11-21 18:56:15,303 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 332 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:15,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 697 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-11-21 18:56:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 754. [2023-11-21 18:56:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.4767596281540505) internal successors, (1112), 753 states have internal predecessors, (1112), 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) [2023-11-21 18:56:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1112 transitions. [2023-11-21 18:56:15,385 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1112 transitions. Word has length 88 [2023-11-21 18:56:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:15,386 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1112 transitions. [2023-11-21 18:56:15,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1112 transitions. [2023-11-21 18:56:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-21 18:56:15,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:15,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:15,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 18:56:15,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:15,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:15,392 INFO L85 PathProgramCache]: Analyzing trace with hash 961104690, now seen corresponding path program 1 times [2023-11-21 18:56:15,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:15,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902445957] [2023-11-21 18:56:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:15,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:15,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902445957] [2023-11-21 18:56:15,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902445957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:15,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:15,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:15,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430125708] [2023-11-21 18:56:15,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:15,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:15,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:15,543 INFO L87 Difference]: Start difference. First operand 754 states and 1112 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2023-11-21 18:56:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:15,695 INFO L93 Difference]: Finished difference Result 1892 states and 2800 transitions. [2023-11-21 18:56:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:15,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2023-11-21 18:56:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:15,705 INFO L225 Difference]: With dead ends: 1892 [2023-11-21 18:56:15,706 INFO L226 Difference]: Without dead ends: 1204 [2023-11-21 18:56:15,707 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 [2023-11-21 18:56:15,708 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 325 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:15,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 764 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2023-11-21 18:56:15,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1202. [2023-11-21 18:56:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 1.4646128226477935) internal successors, (1759), 1201 states have internal predecessors, (1759), 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) [2023-11-21 18:56:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1759 transitions. [2023-11-21 18:56:15,751 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1759 transitions. Word has length 97 [2023-11-21 18:56:15,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:15,752 INFO L495 AbstractCegarLoop]: Abstraction has 1202 states and 1759 transitions. [2023-11-21 18:56:15,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2023-11-21 18:56:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1759 transitions. [2023-11-21 18:56:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-21 18:56:15,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:15,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:15,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 18:56:15,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:15,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash -169687422, now seen corresponding path program 1 times [2023-11-21 18:56:15,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:15,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973436821] [2023-11-21 18:56:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:15,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:15,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:15,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973436821] [2023-11-21 18:56:15,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973436821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:15,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:15,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:15,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840231177] [2023-11-21 18:56:15,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:15,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:15,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:15,865 INFO L87 Difference]: Start difference. First operand 1202 states and 1759 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-11-21 18:56:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:16,011 INFO L93 Difference]: Finished difference Result 2987 states and 4359 transitions. [2023-11-21 18:56:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:16,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2023-11-21 18:56:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:16,022 INFO L225 Difference]: With dead ends: 2987 [2023-11-21 18:56:16,023 INFO L226 Difference]: Without dead ends: 1864 [2023-11-21 18:56:16,024 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 [2023-11-21 18:56:16,026 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 320 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:16,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 667 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2023-11-21 18:56:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1862. [2023-11-21 18:56:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 1.4390112842557765) internal successors, (2678), 1861 states have internal predecessors, (2678), 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) [2023-11-21 18:56:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2678 transitions. [2023-11-21 18:56:16,087 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2678 transitions. Word has length 106 [2023-11-21 18:56:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:16,088 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2678 transitions. [2023-11-21 18:56:16,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-11-21 18:56:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2678 transitions. [2023-11-21 18:56:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-21 18:56:16,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:16,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:16,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 18:56:16,095 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:16,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1669452797, now seen corresponding path program 1 times [2023-11-21 18:56:16,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:16,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111424123] [2023-11-21 18:56:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:16,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:16,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111424123] [2023-11-21 18:56:16,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111424123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:16,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:16,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 18:56:16,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852768305] [2023-11-21 18:56:16,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:16,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 18:56:16,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:16,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 18:56:16,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-21 18:56:16,468 INFO L87 Difference]: Start difference. First operand 1862 states and 2678 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2023-11-21 18:56:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:16,981 INFO L93 Difference]: Finished difference Result 7785 states and 11104 transitions. [2023-11-21 18:56:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 18:56:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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 115 [2023-11-21 18:56:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:17,021 INFO L225 Difference]: With dead ends: 7785 [2023-11-21 18:56:17,022 INFO L226 Difference]: Without dead ends: 5996 [2023-11-21 18:56:17,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-21 18:56:17,032 INFO L413 NwaCegarLoop]: 736 mSDtfsCounter, 1738 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1738 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:17,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1738 Valid, 1669 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:56:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2023-11-21 18:56:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5990. [2023-11-21 18:56:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 1.4165970946735682) internal successors, (8484), 5989 states have internal predecessors, (8484), 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) [2023-11-21 18:56:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 8484 transitions. [2023-11-21 18:56:17,300 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 8484 transitions. Word has length 115 [2023-11-21 18:56:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:17,301 INFO L495 AbstractCegarLoop]: Abstraction has 5990 states and 8484 transitions. [2023-11-21 18:56:17,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2023-11-21 18:56:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 8484 transitions. [2023-11-21 18:56:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-21 18:56:17,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:17,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:17,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 18:56:17,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:17,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2141000369, now seen corresponding path program 1 times [2023-11-21 18:56:17,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:17,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436168174] [2023-11-21 18:56:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:17,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:17,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436168174] [2023-11-21 18:56:17,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436168174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:17,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:17,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:17,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445615131] [2023-11-21 18:56:17,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:17,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:17,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:17,429 INFO L87 Difference]: Start difference. First operand 5990 states and 8484 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-21 18:56:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:17,603 INFO L93 Difference]: Finished difference Result 14130 states and 19961 transitions. [2023-11-21 18:56:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 117 [2023-11-21 18:56:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:17,653 INFO L225 Difference]: With dead ends: 14130 [2023-11-21 18:56:17,654 INFO L226 Difference]: Without dead ends: 9904 [2023-11-21 18:56:17,660 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 [2023-11-21 18:56:17,663 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 321 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:17,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1003 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9904 states. [2023-11-21 18:56:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9904 to 9902. [2023-11-21 18:56:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9902 states, 9901 states have (on average 1.3982426017573983) internal successors, (13844), 9901 states have internal predecessors, (13844), 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) [2023-11-21 18:56:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9902 states to 9902 states and 13844 transitions. [2023-11-21 18:56:18,023 INFO L78 Accepts]: Start accepts. Automaton has 9902 states and 13844 transitions. Word has length 117 [2023-11-21 18:56:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:18,025 INFO L495 AbstractCegarLoop]: Abstraction has 9902 states and 13844 transitions. [2023-11-21 18:56:18,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-21 18:56:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 9902 states and 13844 transitions. [2023-11-21 18:56:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-21 18:56:18,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:18,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:18,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 18:56:18,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:18,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:18,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1263499217, now seen corresponding path program 1 times [2023-11-21 18:56:18,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:18,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905953557] [2023-11-21 18:56:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:18,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:18,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905953557] [2023-11-21 18:56:18,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905953557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:18,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261194691] [2023-11-21 18:56:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:18,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:18,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:18,227 INFO L87 Difference]: Start difference. First operand 9902 states and 13844 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-21 18:56:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:18,421 INFO L93 Difference]: Finished difference Result 20030 states and 27886 transitions. [2023-11-21 18:56:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:18,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 119 [2023-11-21 18:56:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:18,476 INFO L225 Difference]: With dead ends: 20030 [2023-11-21 18:56:18,476 INFO L226 Difference]: Without dead ends: 14824 [2023-11-21 18:56:18,484 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 [2023-11-21 18:56:18,485 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 284 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:18,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1038 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:18,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14824 states. [2023-11-21 18:56:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14824 to 14822. [2023-11-21 18:56:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14822 states, 14821 states have (on average 1.3780446663517982) internal successors, (20424), 14821 states have internal predecessors, (20424), 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) [2023-11-21 18:56:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14822 states to 14822 states and 20424 transitions. [2023-11-21 18:56:19,051 INFO L78 Accepts]: Start accepts. Automaton has 14822 states and 20424 transitions. Word has length 119 [2023-11-21 18:56:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:19,052 INFO L495 AbstractCegarLoop]: Abstraction has 14822 states and 20424 transitions. [2023-11-21 18:56:19,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-21 18:56:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 14822 states and 20424 transitions. [2023-11-21 18:56:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-21 18:56:19,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:19,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:19,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 18:56:19,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:19,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:19,087 INFO L85 PathProgramCache]: Analyzing trace with hash 663505190, now seen corresponding path program 1 times [2023-11-21 18:56:19,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:19,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524425743] [2023-11-21 18:56:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:19,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:19,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:19,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524425743] [2023-11-21 18:56:19,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524425743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:19,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:19,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:19,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045863945] [2023-11-21 18:56:19,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:19,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:19,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:19,200 INFO L87 Difference]: Start difference. First operand 14822 states and 20424 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-21 18:56:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:19,388 INFO L93 Difference]: Finished difference Result 24156 states and 33012 transitions. [2023-11-21 18:56:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:19,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 119 [2023-11-21 18:56:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:19,429 INFO L225 Difference]: With dead ends: 24156 [2023-11-21 18:56:19,429 INFO L226 Difference]: Without dead ends: 19402 [2023-11-21 18:56:19,440 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 [2023-11-21 18:56:19,441 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 285 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:19,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1029 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19402 states. [2023-11-21 18:56:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19402 to 19400. [2023-11-21 18:56:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19400 states, 19399 states have (on average 1.354399711325326) internal successors, (26274), 19399 states have internal predecessors, (26274), 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) [2023-11-21 18:56:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19400 states to 19400 states and 26274 transitions. [2023-11-21 18:56:20,036 INFO L78 Accepts]: Start accepts. Automaton has 19400 states and 26274 transitions. Word has length 119 [2023-11-21 18:56:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:20,036 INFO L495 AbstractCegarLoop]: Abstraction has 19400 states and 26274 transitions. [2023-11-21 18:56:20,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-21 18:56:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 19400 states and 26274 transitions. [2023-11-21 18:56:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:20,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:20,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:20,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 18:56:20,088 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:20,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash 263874882, now seen corresponding path program 1 times [2023-11-21 18:56:20,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:20,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902106367] [2023-11-21 18:56:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:20,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:20,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:20,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902106367] [2023-11-21 18:56:20,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902106367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:20,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:20,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:56:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892012392] [2023-11-21 18:56:20,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:20,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:56:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:20,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:56:20,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:56:20,311 INFO L87 Difference]: Start difference. First operand 19400 states and 26274 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:21,297 INFO L93 Difference]: Finished difference Result 48067 states and 65348 transitions. [2023-11-21 18:56:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:56:21,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:21,370 INFO L225 Difference]: With dead ends: 48067 [2023-11-21 18:56:21,370 INFO L226 Difference]: Without dead ends: 28702 [2023-11-21 18:56:21,402 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 [2023-11-21 18:56:21,403 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1253 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:21,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 524 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 18:56:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2023-11-21 18:56:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28700. [2023-11-21 18:56:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28700 states, 28699 states have (on average 1.3497682846092198) internal successors, (38737), 28699 states have internal predecessors, (38737), 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) [2023-11-21 18:56:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28700 states to 28700 states and 38737 transitions. [2023-11-21 18:56:22,226 INFO L78 Accepts]: Start accepts. Automaton has 28700 states and 38737 transitions. Word has length 121 [2023-11-21 18:56:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:22,226 INFO L495 AbstractCegarLoop]: Abstraction has 28700 states and 38737 transitions. [2023-11-21 18:56:22,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 28700 states and 38737 transitions. [2023-11-21 18:56:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:22,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:22,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:22,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 18:56:22,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:22,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:22,329 INFO L85 PathProgramCache]: Analyzing trace with hash -977595208, now seen corresponding path program 1 times [2023-11-21 18:56:22,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:22,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205089240] [2023-11-21 18:56:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:22,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:22,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205089240] [2023-11-21 18:56:22,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205089240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:22,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:22,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:22,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482582669] [2023-11-21 18:56:22,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:22,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:22,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:22,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:22,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:22,638 INFO L87 Difference]: Start difference. First operand 28700 states and 38737 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:23,026 INFO L93 Difference]: Finished difference Result 38940 states and 52627 transitions. [2023-11-21 18:56:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:23,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:23,064 INFO L225 Difference]: With dead ends: 38940 [2023-11-21 18:56:23,064 INFO L226 Difference]: Without dead ends: 15040 [2023-11-21 18:56:23,092 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 [2023-11-21 18:56:23,093 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 171 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:23,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 629 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15040 states. [2023-11-21 18:56:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15040 to 12670. [2023-11-21 18:56:23,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12670 states, 12669 states have (on average 1.337279974741495) internal successors, (16942), 12669 states have internal predecessors, (16942), 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) [2023-11-21 18:56:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12670 states to 12670 states and 16942 transitions. [2023-11-21 18:56:23,538 INFO L78 Accepts]: Start accepts. Automaton has 12670 states and 16942 transitions. Word has length 121 [2023-11-21 18:56:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:23,538 INFO L495 AbstractCegarLoop]: Abstraction has 12670 states and 16942 transitions. [2023-11-21 18:56:23,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 12670 states and 16942 transitions. [2023-11-21 18:56:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:23,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:23,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:23,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 18:56:23,560 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:23,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1512494668, now seen corresponding path program 1 times [2023-11-21 18:56:23,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:23,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639329473] [2023-11-21 18:56:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:23,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:23,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639329473] [2023-11-21 18:56:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639329473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:23,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:23,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:23,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118902478] [2023-11-21 18:56:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:23,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:23,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:23,823 INFO L87 Difference]: Start difference. First operand 12670 states and 16942 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:23,968 INFO L93 Difference]: Finished difference Result 17670 states and 23652 transitions. [2023-11-21 18:56:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:23,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:23,984 INFO L225 Difference]: With dead ends: 17670 [2023-11-21 18:56:23,984 INFO L226 Difference]: Without dead ends: 6450 [2023-11-21 18:56:23,992 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 [2023-11-21 18:56:23,993 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 121 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:23,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 594 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:24,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6450 states. [2023-11-21 18:56:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6450 to 6448. [2023-11-21 18:56:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6448 states, 6447 states have (on average 1.3147200248177446) internal successors, (8476), 6447 states have internal predecessors, (8476), 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) [2023-11-21 18:56:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6448 states to 6448 states and 8476 transitions. [2023-11-21 18:56:24,244 INFO L78 Accepts]: Start accepts. Automaton has 6448 states and 8476 transitions. Word has length 121 [2023-11-21 18:56:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:24,244 INFO L495 AbstractCegarLoop]: Abstraction has 6448 states and 8476 transitions. [2023-11-21 18:56:24,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6448 states and 8476 transitions. [2023-11-21 18:56:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:24,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:24,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:24,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 18:56:24,254 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:24,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash -424735835, now seen corresponding path program 1 times [2023-11-21 18:56:24,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:24,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62841565] [2023-11-21 18:56:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:24,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:24,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:24,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62841565] [2023-11-21 18:56:24,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62841565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:24,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:24,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:24,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691595233] [2023-11-21 18:56:24,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:24,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:24,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:24,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:24,476 INFO L87 Difference]: Start difference. First operand 6448 states and 8476 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:24,577 INFO L93 Difference]: Finished difference Result 8539 states and 11214 transitions. [2023-11-21 18:56:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:24,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:24,584 INFO L225 Difference]: With dead ends: 8539 [2023-11-21 18:56:24,585 INFO L226 Difference]: Without dead ends: 3384 [2023-11-21 18:56:24,588 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 [2023-11-21 18:56:24,590 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 75 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:24,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 578 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:56:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2023-11-21 18:56:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3382. [2023-11-21 18:56:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3381 states have (on average 1.2860100561963916) internal successors, (4348), 3381 states have internal predecessors, (4348), 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) [2023-11-21 18:56:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 4348 transitions. [2023-11-21 18:56:24,652 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 4348 transitions. Word has length 121 [2023-11-21 18:56:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:24,652 INFO L495 AbstractCegarLoop]: Abstraction has 3382 states and 4348 transitions. [2023-11-21 18:56:24,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 4348 transitions. [2023-11-21 18:56:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:24,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:24,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:24,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 18:56:24,658 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:24,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1660507144, now seen corresponding path program 1 times [2023-11-21 18:56:24,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:24,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447579915] [2023-11-21 18:56:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:24,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:25,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:25,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447579915] [2023-11-21 18:56:25,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447579915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:25,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:25,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 18:56:25,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578652819] [2023-11-21 18:56:25,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:25,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 18:56:25,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 18:56:25,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 18:56:25,295 INFO L87 Difference]: Start difference. First operand 3382 states and 4348 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:26,079 INFO L93 Difference]: Finished difference Result 9206 states and 11787 transitions. [2023-11-21 18:56:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 18:56:26,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:26,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:26,093 INFO L225 Difference]: With dead ends: 9206 [2023-11-21 18:56:26,093 INFO L226 Difference]: Without dead ends: 6010 [2023-11-21 18:56:26,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-21 18:56:26,098 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 2076 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2076 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:26,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2076 Valid, 453 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 18:56:26,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2023-11-21 18:56:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 4870. [2023-11-21 18:56:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 4869 states have (on average 1.2791127541589649) internal successors, (6228), 4869 states have internal predecessors, (6228), 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) [2023-11-21 18:56:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 6228 transitions. [2023-11-21 18:56:26,202 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 6228 transitions. Word has length 121 [2023-11-21 18:56:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:26,202 INFO L495 AbstractCegarLoop]: Abstraction has 4870 states and 6228 transitions. [2023-11-21 18:56:26,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 6228 transitions. [2023-11-21 18:56:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:26,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:26,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:26,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 18:56:26,211 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:26,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 925901288, now seen corresponding path program 1 times [2023-11-21 18:56:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:26,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725074542] [2023-11-21 18:56:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:26,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:28,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:28,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725074542] [2023-11-21 18:56:28,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725074542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:28,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:28,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-21 18:56:28,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143707555] [2023-11-21 18:56:28,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 18:56:28,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:28,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 18:56:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-21 18:56:28,797 INFO L87 Difference]: Start difference. First operand 4870 states and 6228 transitions. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:33,793 INFO L93 Difference]: Finished difference Result 11458 states and 14599 transitions. [2023-11-21 18:56:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 18:56:33,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:33,812 INFO L225 Difference]: With dead ends: 11458 [2023-11-21 18:56:33,812 INFO L226 Difference]: Without dead ends: 9950 [2023-11-21 18:56:33,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2023-11-21 18:56:33,817 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 2157 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2157 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:33,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2157 Valid, 1728 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1931 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-21 18:56:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9950 states. [2023-11-21 18:56:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9950 to 5204. [2023-11-21 18:56:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5204 states, 5203 states have (on average 1.2754180280607341) internal successors, (6636), 5203 states have internal predecessors, (6636), 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) [2023-11-21 18:56:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5204 states to 5204 states and 6636 transitions. [2023-11-21 18:56:33,925 INFO L78 Accepts]: Start accepts. Automaton has 5204 states and 6636 transitions. Word has length 121 [2023-11-21 18:56:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:33,925 INFO L495 AbstractCegarLoop]: Abstraction has 5204 states and 6636 transitions. [2023-11-21 18:56:33,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5204 states and 6636 transitions. [2023-11-21 18:56:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:33,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:33,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:33,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 18:56:33,934 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:33,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash -463915937, now seen corresponding path program 1 times [2023-11-21 18:56:33,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:33,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003162441] [2023-11-21 18:56:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:33,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:34,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:34,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003162441] [2023-11-21 18:56:34,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003162441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:34,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:34,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:56:34,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166237076] [2023-11-21 18:56:34,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:34,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:56:34,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:34,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:56:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:56:34,188 INFO L87 Difference]: Start difference. First operand 5204 states and 6636 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:34,595 INFO L93 Difference]: Finished difference Result 11197 states and 14264 transitions. [2023-11-21 18:56:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:56:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:34,611 INFO L225 Difference]: With dead ends: 11197 [2023-11-21 18:56:34,612 INFO L226 Difference]: Without dead ends: 6058 [2023-11-21 18:56:34,617 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 [2023-11-21 18:56:34,618 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 902 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:34,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 297 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:56:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2023-11-21 18:56:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 5204. [2023-11-21 18:56:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5204 states, 5203 states have (on average 1.2744570440130694) internal successors, (6631), 5203 states have internal predecessors, (6631), 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) [2023-11-21 18:56:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5204 states to 5204 states and 6631 transitions. [2023-11-21 18:56:34,755 INFO L78 Accepts]: Start accepts. Automaton has 5204 states and 6631 transitions. Word has length 121 [2023-11-21 18:56:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:34,755 INFO L495 AbstractCegarLoop]: Abstraction has 5204 states and 6631 transitions. [2023-11-21 18:56:34,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5204 states and 6631 transitions. [2023-11-21 18:56:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:34,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:34,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:34,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 18:56:34,766 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:34,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1681562044, now seen corresponding path program 1 times [2023-11-21 18:56:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:34,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164200682] [2023-11-21 18:56:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:34,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:35,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164200682] [2023-11-21 18:56:35,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164200682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:35,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:35,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 18:56:35,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31059295] [2023-11-21 18:56:35,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:35,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 18:56:35,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:35,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 18:56:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 18:56:35,329 INFO L87 Difference]: Start difference. First operand 5204 states and 6631 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:36,305 INFO L93 Difference]: Finished difference Result 15097 states and 19386 transitions. [2023-11-21 18:56:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 18:56:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:36,327 INFO L225 Difference]: With dead ends: 15097 [2023-11-21 18:56:36,328 INFO L226 Difference]: Without dead ends: 10262 [2023-11-21 18:56:36,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-21 18:56:36,336 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 2168 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2168 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:36,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2168 Valid, 528 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 18:56:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10262 states. [2023-11-21 18:56:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10262 to 7724. [2023-11-21 18:56:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7724 states, 7723 states have (on average 1.2628512236177651) internal successors, (9753), 7723 states have internal predecessors, (9753), 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) [2023-11-21 18:56:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 9753 transitions. [2023-11-21 18:56:36,544 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 9753 transitions. Word has length 121 [2023-11-21 18:56:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:36,545 INFO L495 AbstractCegarLoop]: Abstraction has 7724 states and 9753 transitions. [2023-11-21 18:56:36,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 9753 transitions. [2023-11-21 18:56:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:36,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:36,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:36,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 18:56:36,559 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:36,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash 104688740, now seen corresponding path program 1 times [2023-11-21 18:56:36,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:36,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482083860] [2023-11-21 18:56:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:36,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:40,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:40,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482083860] [2023-11-21 18:56:40,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482083860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:40,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:40,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-21 18:56:40,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370271156] [2023-11-21 18:56:40,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:40,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-21 18:56:40,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-21 18:56:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-21 18:56:40,591 INFO L87 Difference]: Start difference. First operand 7724 states and 9753 transitions. Second operand has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:43,725 INFO L93 Difference]: Finished difference Result 11386 states and 14288 transitions. [2023-11-21 18:56:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-21 18:56:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:43,743 INFO L225 Difference]: With dead ends: 11386 [2023-11-21 18:56:43,743 INFO L226 Difference]: Without dead ends: 8632 [2023-11-21 18:56:43,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2023-11-21 18:56:43,781 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1702 mSDsluCounter, 2828 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:43,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1702 Valid, 3145 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-21 18:56:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2023-11-21 18:56:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 8049. [2023-11-21 18:56:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8049 states, 8048 states have (on average 1.2601888667992047) internal successors, (10142), 8048 states have internal predecessors, (10142), 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) [2023-11-21 18:56:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8049 states to 8049 states and 10142 transitions. [2023-11-21 18:56:43,961 INFO L78 Accepts]: Start accepts. Automaton has 8049 states and 10142 transitions. Word has length 121 [2023-11-21 18:56:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:43,962 INFO L495 AbstractCegarLoop]: Abstraction has 8049 states and 10142 transitions. [2023-11-21 18:56:43,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 8049 states and 10142 transitions. [2023-11-21 18:56:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:43,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:43,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:43,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 18:56:43,976 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:43,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:43,977 INFO L85 PathProgramCache]: Analyzing trace with hash 612369448, now seen corresponding path program 1 times [2023-11-21 18:56:43,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:43,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006685467] [2023-11-21 18:56:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:43,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:44,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:44,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006685467] [2023-11-21 18:56:44,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006685467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:44,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:44,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:44,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966904275] [2023-11-21 18:56:44,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:44,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:44,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:44,190 INFO L87 Difference]: Start difference. First operand 8049 states and 10142 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:44,278 INFO L93 Difference]: Finished difference Result 10843 states and 13694 transitions. [2023-11-21 18:56:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:44,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:44,287 INFO L225 Difference]: With dead ends: 10843 [2023-11-21 18:56:44,287 INFO L226 Difference]: Without dead ends: 4310 [2023-11-21 18:56:44,292 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 [2023-11-21 18:56:44,293 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 67 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:44,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 455 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:56:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2023-11-21 18:56:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4308. [2023-11-21 18:56:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4308 states, 4307 states have (on average 1.229161829579754) internal successors, (5294), 4307 states have internal predecessors, (5294), 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) [2023-11-21 18:56:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4308 states to 4308 states and 5294 transitions. [2023-11-21 18:56:44,377 INFO L78 Accepts]: Start accepts. Automaton has 4308 states and 5294 transitions. Word has length 121 [2023-11-21 18:56:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:44,378 INFO L495 AbstractCegarLoop]: Abstraction has 4308 states and 5294 transitions. [2023-11-21 18:56:44,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4308 states and 5294 transitions. [2023-11-21 18:56:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:44,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:44,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-21 18:56:44,386 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:44,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2037424765, now seen corresponding path program 1 times [2023-11-21 18:56:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:44,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74494409] [2023-11-21 18:56:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:44,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:44,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:44,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74494409] [2023-11-21 18:56:44,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74494409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:44,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:44,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 18:56:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462022153] [2023-11-21 18:56:44,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:44,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 18:56:44,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 18:56:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 18:56:44,930 INFO L87 Difference]: Start difference. First operand 4308 states and 5294 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:45,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:45,479 INFO L93 Difference]: Finished difference Result 12087 states and 14916 transitions. [2023-11-21 18:56:45,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 18:56:45,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-21 18:56:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:45,492 INFO L225 Difference]: With dead ends: 12087 [2023-11-21 18:56:45,492 INFO L226 Difference]: Without dead ends: 7843 [2023-11-21 18:56:45,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-21 18:56:45,497 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1708 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:45,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1708 Valid, 399 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:56:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7843 states. [2023-11-21 18:56:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7843 to 6301. [2023-11-21 18:56:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6301 states, 6300 states have (on average 1.216984126984127) internal successors, (7667), 6300 states have internal predecessors, (7667), 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) [2023-11-21 18:56:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6301 states to 6301 states and 7667 transitions. [2023-11-21 18:56:45,595 INFO L78 Accepts]: Start accepts. Automaton has 6301 states and 7667 transitions. Word has length 121 [2023-11-21 18:56:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:45,595 INFO L495 AbstractCegarLoop]: Abstraction has 6301 states and 7667 transitions. [2023-11-21 18:56:45,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 6301 states and 7667 transitions. [2023-11-21 18:56:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 18:56:45,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:45,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:45,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-21 18:56:45,603 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:45,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2070176168, now seen corresponding path program 1 times [2023-11-21 18:56:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:45,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361136949] [2023-11-21 18:56:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:48,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:48,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361136949] [2023-11-21 18:56:48,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361136949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:48,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:48,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-21 18:56:48,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27887174] [2023-11-21 18:56:48,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:48,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 18:56:48,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 18:56:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-21 18:56:48,065 INFO L87 Difference]: Start difference. First operand 6301 states and 7667 transitions. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)