./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.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54dd2c42579f0de559de8ea2b74ae8f2f84f80b7530dd7d24e9994fd7ce14291 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:58:08,833 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:58:08,896 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:58:08,900 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:58:08,901 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:58:08,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:58:08,924 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:58:08,924 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:58:08,925 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:58:08,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:58:08,926 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:58:08,926 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:58:08,927 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:58:08,927 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:58:08,928 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:58:08,928 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:58:08,929 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:58:08,929 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:58:08,930 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:58:08,930 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:58:08,931 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:58:08,932 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:58:08,932 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:58:08,933 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:58:08,933 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:58:08,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:58:08,934 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:58:08,935 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:58:08,935 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:58:08,935 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:58:08,936 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:58:08,936 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:58:08,936 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:58:08,937 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:58:08,937 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:58:08,937 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:58:08,937 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:58:08,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:58:08,938 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:58:08,938 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:58:08,938 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:58:08,939 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:58:08,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:58:08,939 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:58:08,939 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:58:08,939 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:58:08,940 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:58:08,940 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_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54dd2c42579f0de559de8ea2b74ae8f2f84f80b7530dd7d24e9994fd7ce14291 [2023-12-02 18:58:09,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:58:09,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:58:09,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:58:09,171 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:58:09,172 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:58:09,173 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-12-02 18:58:11,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:58:12,181 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:58:12,181 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-12-02 18:58:12,193 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/data/2c5a4e708/ef416ff478e74520b8267f8798c342eb/FLAGccb2c87b9 [2023-12-02 18:58:12,208 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/data/2c5a4e708/ef416ff478e74520b8267f8798c342eb [2023-12-02 18:58:12,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:58:12,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:58:12,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:58:12,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:58:12,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:58:12,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6939c73b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12, skipping insertion in model container [2023-12-02 18:58:12,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,269 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:58:12,471 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_17bdc977-aeda-444e-91d2-0f97dc49ac17/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-12-02 18:58:12,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:58:12,547 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:58:12,602 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_17bdc977-aeda-444e-91d2-0f97dc49ac17/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-12-02 18:58:12,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:58:12,654 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:58:12,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12 WrapperNode [2023-12-02 18:58:12,655 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:58:12,656 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:58:12,656 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:58:12,656 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:58:12,662 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,716 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 730 [2023-12-02 18:58:12,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:58:12,718 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:58:12,718 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:58:12,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:58:12,725 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,730 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,745 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,753 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,760 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:58:12,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:58:12,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:58:12,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:58:12,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (1/1) ... [2023-12-02 18:58:12,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:58:12,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:58:12,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:58:12,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:58:12,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:58:12,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:58:12,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:58:12,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:58:12,968 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:58:12,970 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:58:13,527 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:58:13,689 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:58:13,689 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 18:58:13,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:58:13 BoogieIcfgContainer [2023-12-02 18:58:13,691 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:58:13,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:58:13,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:58:13,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:58:13,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:58:12" (1/3) ... [2023-12-02 18:58:13,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209388a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:58:13, skipping insertion in model container [2023-12-02 18:58:13,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:58:12" (2/3) ... [2023-12-02 18:58:13,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209388a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:58:13, skipping insertion in model container [2023-12-02 18:58:13,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:58:13" (3/3) ... [2023-12-02 18:58:13,699 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-12-02 18:58:13,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:58:13,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:58:13,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:58:13,766 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;@17f97e31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:58:13,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:58:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 18:58:13,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:13,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:58:13,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:13,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:13,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1138388177, now seen corresponding path program 1 times [2023-12-02 18:58:13,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:13,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340790667] [2023-12-02 18:58:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:13,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:14,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:14,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340790667] [2023-12-02 18:58:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340790667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:14,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:14,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:58:14,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582042393] [2023-12-02 18:58:14,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:14,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:58:14,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:58:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:58:14,324 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 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 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:14,549 INFO L93 Difference]: Finished difference Result 406 states and 650 transitions. [2023-12-02 18:58:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:58:14,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-12-02 18:58:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:14,565 INFO L225 Difference]: With dead ends: 406 [2023-12-02 18:58:14,565 INFO L226 Difference]: Without dead ends: 324 [2023-12-02 18:58:14,568 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 [2023-12-02 18:58:14,572 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 785 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:14,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 644 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:58:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-02 18:58:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 318. [2023-12-02 18:58:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.384858044164038) internal successors, (439), 317 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 439 transitions. [2023-12-02 18:58:14,627 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 439 transitions. Word has length 54 [2023-12-02 18:58:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:14,628 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 439 transitions. [2023-12-02 18:58:14,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 439 transitions. [2023-12-02 18:58:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 18:58:14,631 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:14,631 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] [2023-12-02 18:58:14,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:58:14,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:14,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash -639295051, now seen corresponding path program 1 times [2023-12-02 18:58:14,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:14,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526324999] [2023-12-02 18:58:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:14,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:14,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526324999] [2023-12-02 18:58:14,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526324999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:14,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:14,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:58:14,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684639733] [2023-12-02 18:58:14,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:14,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:58:14,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:58:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:58:14,789 INFO L87 Difference]: Start difference. First operand 318 states and 439 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:15,017 INFO L93 Difference]: Finished difference Result 764 states and 1085 transitions. [2023-12-02 18:58:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:58:15,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 18:58:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:15,022 INFO L225 Difference]: With dead ends: 764 [2023-12-02 18:58:15,022 INFO L226 Difference]: Without dead ends: 496 [2023-12-02 18:58:15,024 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 [2023-12-02 18:58:15,025 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 468 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:15,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 188 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:58:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-12-02 18:58:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 494. [2023-12-02 18:58:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.4137931034482758) internal successors, (697), 493 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 697 transitions. [2023-12-02 18:58:15,054 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 697 transitions. Word has length 55 [2023-12-02 18:58:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:15,055 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 697 transitions. [2023-12-02 18:58:15,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 697 transitions. [2023-12-02 18:58:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 18:58:15,058 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:15,058 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] [2023-12-02 18:58:15,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:58:15,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:15,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1950824429, now seen corresponding path program 1 times [2023-12-02 18:58:15,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:15,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696768175] [2023-12-02 18:58:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:15,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:15,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:15,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696768175] [2023-12-02 18:58:15,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696768175] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:15,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:15,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:58:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723762904] [2023-12-02 18:58:15,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:15,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:58:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:58:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:58:15,204 INFO L87 Difference]: Start difference. First operand 494 states and 697 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:15,414 INFO L93 Difference]: Finished difference Result 1242 states and 1795 transitions. [2023-12-02 18:58:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:58:15,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 18:58:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:15,420 INFO L225 Difference]: With dead ends: 1242 [2023-12-02 18:58:15,420 INFO L226 Difference]: Without dead ends: 848 [2023-12-02 18:58:15,422 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 [2023-12-02 18:58:15,424 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 440 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:15,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 204 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:58:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2023-12-02 18:58:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 846. [2023-12-02 18:58:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.4355029585798817) internal successors, (1213), 845 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1213 transitions. [2023-12-02 18:58:15,457 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1213 transitions. Word has length 55 [2023-12-02 18:58:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:15,457 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1213 transitions. [2023-12-02 18:58:15,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1213 transitions. [2023-12-02 18:58:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 18:58:15,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:15,477 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] [2023-12-02 18:58:15,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:58:15,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:15,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash -237169724, now seen corresponding path program 1 times [2023-12-02 18:58:15,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:15,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091765784] [2023-12-02 18:58:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:15,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:15,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:15,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091765784] [2023-12-02 18:58:15,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091765784] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:15,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:15,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:58:15,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319631827] [2023-12-02 18:58:15,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:15,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:58:15,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:15,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:58:15,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:58:15,589 INFO L87 Difference]: Start difference. First operand 846 states and 1213 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:15,786 INFO L93 Difference]: Finished difference Result 2325 states and 3384 transitions. [2023-12-02 18:58:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:58:15,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 18:58:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:15,795 INFO L225 Difference]: With dead ends: 2325 [2023-12-02 18:58:15,795 INFO L226 Difference]: Without dead ends: 1552 [2023-12-02 18:58:15,796 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 [2023-12-02 18:58:15,797 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 445 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:15,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 196 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:58:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2023-12-02 18:58:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1550. [2023-12-02 18:58:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 1.4441575209812783) internal successors, (2237), 1549 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2237 transitions. [2023-12-02 18:58:15,829 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2237 transitions. Word has length 55 [2023-12-02 18:58:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:15,829 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2237 transitions. [2023-12-02 18:58:15,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2237 transitions. [2023-12-02 18:58:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 18:58:15,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:15,831 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] [2023-12-02 18:58:15,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:58:15,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:15,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:15,832 INFO L85 PathProgramCache]: Analyzing trace with hash 417755622, now seen corresponding path program 1 times [2023-12-02 18:58:15,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:15,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312131913] [2023-12-02 18:58:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:15,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:15,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:15,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312131913] [2023-12-02 18:58:15,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312131913] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:15,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:15,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:58:15,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399554893] [2023-12-02 18:58:15,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:15,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:58:15,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:58:15,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:58:15,945 INFO L87 Difference]: Start difference. First operand 1550 states and 2237 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:16,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:16,127 INFO L93 Difference]: Finished difference Result 4172 states and 6061 transitions. [2023-12-02 18:58:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:58:16,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 18:58:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:16,138 INFO L225 Difference]: With dead ends: 4172 [2023-12-02 18:58:16,138 INFO L226 Difference]: Without dead ends: 2656 [2023-12-02 18:58:16,140 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 [2023-12-02 18:58:16,141 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 461 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:16,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 180 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:58:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2023-12-02 18:58:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2023-12-02 18:58:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 1.4364869958537505) internal successors, (3811), 2653 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3811 transitions. [2023-12-02 18:58:16,192 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3811 transitions. Word has length 55 [2023-12-02 18:58:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:16,192 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 3811 transitions. [2023-12-02 18:58:16,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3811 transitions. [2023-12-02 18:58:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 18:58:16,194 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:16,194 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] [2023-12-02 18:58:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:58:16,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:16,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:16,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1728736293, now seen corresponding path program 1 times [2023-12-02 18:58:16,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:16,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327362836] [2023-12-02 18:58:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:16,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:17,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:17,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327362836] [2023-12-02 18:58:17,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327362836] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:17,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:17,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-12-02 18:58:17,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777751702] [2023-12-02 18:58:17,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:17,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:58:17,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:58:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:58:17,296 INFO L87 Difference]: Start difference. First operand 2654 states and 3811 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2023-12-02 18:58:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:18,060 INFO L93 Difference]: Finished difference Result 5537 states and 7937 transitions. [2023-12-02 18:58:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 18:58:18,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 [2023-12-02 18:58:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:18,083 INFO L225 Difference]: With dead ends: 5537 [2023-12-02 18:58:18,083 INFO L226 Difference]: Without dead ends: 5535 [2023-12-02 18:58:18,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2023-12-02 18:58:18,086 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 724 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:18,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1154 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:58:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2023-12-02 18:58:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4549. [2023-12-02 18:58:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4549 states, 4548 states have (on average 1.4316182937554969) internal successors, (6511), 4548 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 6511 transitions. [2023-12-02 18:58:18,177 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 6511 transitions. Word has length 56 [2023-12-02 18:58:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:18,177 INFO L495 AbstractCegarLoop]: Abstraction has 4549 states and 6511 transitions. [2023-12-02 18:58:18,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2023-12-02 18:58:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 6511 transitions. [2023-12-02 18:58:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 18:58:18,178 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:18,178 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] [2023-12-02 18:58:18,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:58:18,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:18,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash 11095013, now seen corresponding path program 1 times [2023-12-02 18:58:18,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:18,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419820344] [2023-12-02 18:58:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:19,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:19,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419820344] [2023-12-02 18:58:19,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419820344] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:19,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:19,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-12-02 18:58:19,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671070735] [2023-12-02 18:58:19,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:19,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:58:19,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:19,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:58:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:58:19,080 INFO L87 Difference]: Start difference. First operand 4549 states and 6511 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2023-12-02 18:58:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:19,757 INFO L93 Difference]: Finished difference Result 5234 states and 7461 transitions. [2023-12-02 18:58:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 18:58:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 [2023-12-02 18:58:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:19,778 INFO L225 Difference]: With dead ends: 5234 [2023-12-02 18:58:19,778 INFO L226 Difference]: Without dead ends: 5232 [2023-12-02 18:58:19,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-12-02 18:58:19,781 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 839 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:19,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1511 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:58:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2023-12-02 18:58:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 4569. [2023-12-02 18:58:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4568 states have (on average 1.430385288966725) internal successors, (6534), 4568 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 6534 transitions. [2023-12-02 18:58:19,865 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 6534 transitions. Word has length 56 [2023-12-02 18:58:19,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:19,866 INFO L495 AbstractCegarLoop]: Abstraction has 4569 states and 6534 transitions. [2023-12-02 18:58:19,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2023-12-02 18:58:19,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 6534 transitions. [2023-12-02 18:58:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 18:58:19,867 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:19,867 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] [2023-12-02 18:58:19,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 18:58:19,867 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:19,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:19,868 INFO L85 PathProgramCache]: Analyzing trace with hash 372455429, now seen corresponding path program 1 times [2023-12-02 18:58:19,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:19,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610389714] [2023-12-02 18:58:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:19,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:20,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:20,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610389714] [2023-12-02 18:58:20,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610389714] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:20,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:20,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-12-02 18:58:20,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135929942] [2023-12-02 18:58:20,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:20,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:58:20,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:20,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:58:20,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:58:20,738 INFO L87 Difference]: Start difference. First operand 4569 states and 6534 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2023-12-02 18:58:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:21,617 INFO L93 Difference]: Finished difference Result 6659 states and 9508 transitions. [2023-12-02 18:58:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 18:58:21,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 [2023-12-02 18:58:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:21,640 INFO L225 Difference]: With dead ends: 6659 [2023-12-02 18:58:21,640 INFO L226 Difference]: Without dead ends: 5841 [2023-12-02 18:58:21,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-12-02 18:58:21,643 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 705 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:21,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 1937 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:58:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2023-12-02 18:58:21,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 5305. [2023-12-02 18:58:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5305 states, 5304 states have (on average 1.4276018099547512) internal successors, (7572), 5304 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5305 states to 5305 states and 7572 transitions. [2023-12-02 18:58:21,769 INFO L78 Accepts]: Start accepts. Automaton has 5305 states and 7572 transitions. Word has length 56 [2023-12-02 18:58:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:21,769 INFO L495 AbstractCegarLoop]: Abstraction has 5305 states and 7572 transitions. [2023-12-02 18:58:21,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2023-12-02 18:58:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5305 states and 7572 transitions. [2023-12-02 18:58:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 18:58:21,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:21,770 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] [2023-12-02 18:58:21,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 18:58:21,770 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:21,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash 593422405, now seen corresponding path program 1 times [2023-12-02 18:58:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:21,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593442959] [2023-12-02 18:58:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:22,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593442959] [2023-12-02 18:58:22,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593442959] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:22,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:22,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-12-02 18:58:22,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265654851] [2023-12-02 18:58:22,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:22,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 18:58:22,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:22,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 18:58:22,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:58:22,757 INFO L87 Difference]: Start difference. First operand 5305 states and 7572 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2023-12-02 18:58:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:23,572 INFO L93 Difference]: Finished difference Result 9807 states and 14103 transitions. [2023-12-02 18:58:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 18:58:23,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 [2023-12-02 18:58:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:23,600 INFO L225 Difference]: With dead ends: 9807 [2023-12-02 18:58:23,600 INFO L226 Difference]: Without dead ends: 7581 [2023-12-02 18:58:23,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2023-12-02 18:58:23,605 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 676 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:23,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1847 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:58:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2023-12-02 18:58:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 6598. [2023-12-02 18:58:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6598 states, 6597 states have (on average 1.4183719872669396) internal successors, (9357), 6597 states have internal predecessors, (9357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 9357 transitions. [2023-12-02 18:58:23,697 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 9357 transitions. Word has length 56 [2023-12-02 18:58:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:23,698 INFO L495 AbstractCegarLoop]: Abstraction has 6598 states and 9357 transitions. [2023-12-02 18:58:23,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2023-12-02 18:58:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 9357 transitions. [2023-12-02 18:58:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 18:58:23,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:23,699 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] [2023-12-02 18:58:23,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 18:58:23,700 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:23,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash 399951417, now seen corresponding path program 1 times [2023-12-02 18:58:23,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:23,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576626655] [2023-12-02 18:58:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:23,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:24,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:24,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576626655] [2023-12-02 18:58:24,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576626655] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:24,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:24,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-12-02 18:58:24,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317475215] [2023-12-02 18:58:24,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:24,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:58:24,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:24,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:58:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:58:24,529 INFO L87 Difference]: Start difference. First operand 6598 states and 9357 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:25,213 INFO L93 Difference]: Finished difference Result 9473 states and 13469 transitions. [2023-12-02 18:58:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 18:58:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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 58 [2023-12-02 18:58:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:25,226 INFO L225 Difference]: With dead ends: 9473 [2023-12-02 18:58:25,226 INFO L226 Difference]: Without dead ends: 9471 [2023-12-02 18:58:25,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2023-12-02 18:58:25,230 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 673 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:25,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1480 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:58:25,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9471 states. [2023-12-02 18:58:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9471 to 6607. [2023-12-02 18:58:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6607 states, 6606 states have (on average 1.4179533757190432) internal successors, (9367), 6606 states have internal predecessors, (9367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6607 states to 6607 states and 9367 transitions. [2023-12-02 18:58:25,336 INFO L78 Accepts]: Start accepts. Automaton has 6607 states and 9367 transitions. Word has length 58 [2023-12-02 18:58:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:25,337 INFO L495 AbstractCegarLoop]: Abstraction has 6607 states and 9367 transitions. [2023-12-02 18:58:25,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6607 states and 9367 transitions. [2023-12-02 18:58:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 18:58:25,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:25,338 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] [2023-12-02 18:58:25,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 18:58:25,338 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:25,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:25,339 INFO L85 PathProgramCache]: Analyzing trace with hash 761311833, now seen corresponding path program 1 times [2023-12-02 18:58:25,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:25,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403010749] [2023-12-02 18:58:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:25,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:26,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:26,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403010749] [2023-12-02 18:58:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403010749] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:26,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:26,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-12-02 18:58:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330950802] [2023-12-02 18:58:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:26,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:58:26,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:26,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:58:26,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:58:26,257 INFO L87 Difference]: Start difference. First operand 6607 states and 9367 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:26,922 INFO L93 Difference]: Finished difference Result 8716 states and 12362 transitions. [2023-12-02 18:58:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 18:58:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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 58 [2023-12-02 18:58:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:26,934 INFO L225 Difference]: With dead ends: 8716 [2023-12-02 18:58:26,934 INFO L226 Difference]: Without dead ends: 7898 [2023-12-02 18:58:26,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2023-12-02 18:58:26,937 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 638 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:26,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 1328 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:58:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7898 states. [2023-12-02 18:58:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7898 to 6604. [2023-12-02 18:58:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6604 states, 6603 states have (on average 1.4179918218991368) internal successors, (9363), 6603 states have internal predecessors, (9363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6604 states to 6604 states and 9363 transitions. [2023-12-02 18:58:27,020 INFO L78 Accepts]: Start accepts. Automaton has 6604 states and 9363 transitions. Word has length 58 [2023-12-02 18:58:27,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:27,021 INFO L495 AbstractCegarLoop]: Abstraction has 6604 states and 9363 transitions. [2023-12-02 18:58:27,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 6604 states and 9363 transitions. [2023-12-02 18:58:27,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 18:58:27,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:27,022 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] [2023-12-02 18:58:27,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 18:58:27,022 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:27,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:27,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1610868199, now seen corresponding path program 1 times [2023-12-02 18:58:27,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:27,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123727355] [2023-12-02 18:58:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:27,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:27,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:27,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123727355] [2023-12-02 18:58:27,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123727355] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:27,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:27,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-12-02 18:58:27,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929242582] [2023-12-02 18:58:27,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:27,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:58:27,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:58:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:58:27,976 INFO L87 Difference]: Start difference. First operand 6604 states and 9363 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:28,981 INFO L93 Difference]: Finished difference Result 7671 states and 10858 transitions. [2023-12-02 18:58:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 18:58:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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 58 [2023-12-02 18:58:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:28,990 INFO L225 Difference]: With dead ends: 7671 [2023-12-02 18:58:28,990 INFO L226 Difference]: Without dead ends: 7669 [2023-12-02 18:58:28,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-12-02 18:58:28,993 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 595 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:28,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 1845 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:58:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2023-12-02 18:58:29,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 6617. [2023-12-02 18:58:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6617 states, 6616 states have (on average 1.4176239419588876) internal successors, (9379), 6616 states have internal predecessors, (9379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6617 states to 6617 states and 9379 transitions. [2023-12-02 18:58:29,070 INFO L78 Accepts]: Start accepts. Automaton has 6617 states and 9379 transitions. Word has length 58 [2023-12-02 18:58:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:29,070 INFO L495 AbstractCegarLoop]: Abstraction has 6617 states and 9379 transitions. [2023-12-02 18:58:29,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6617 states and 9379 transitions. [2023-12-02 18:58:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 18:58:29,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:29,072 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] [2023-12-02 18:58:29,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 18:58:29,072 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:29,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2002639513, now seen corresponding path program 1 times [2023-12-02 18:58:29,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:29,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295228760] [2023-12-02 18:58:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:29,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:29,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:29,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295228760] [2023-12-02 18:58:29,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295228760] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:29,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:29,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-12-02 18:58:29,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260974032] [2023-12-02 18:58:29,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:29,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 18:58:29,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 18:58:29,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:58:29,943 INFO L87 Difference]: Start difference. First operand 6617 states and 9379 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:30,879 INFO L93 Difference]: Finished difference Result 12211 states and 17401 transitions. [2023-12-02 18:58:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 18:58:30,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 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 58 [2023-12-02 18:58:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:30,887 INFO L225 Difference]: With dead ends: 12211 [2023-12-02 18:58:30,887 INFO L226 Difference]: Without dead ends: 9105 [2023-12-02 18:58:30,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2023-12-02 18:58:30,892 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 660 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:30,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 997 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:58:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2023-12-02 18:58:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 7646. [2023-12-02 18:58:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7646 states, 7645 states have (on average 1.4153041203400916) internal successors, (10820), 7645 states have internal predecessors, (10820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7646 states to 7646 states and 10820 transitions. [2023-12-02 18:58:31,010 INFO L78 Accepts]: Start accepts. Automaton has 7646 states and 10820 transitions. Word has length 58 [2023-12-02 18:58:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:31,011 INFO L495 AbstractCegarLoop]: Abstraction has 7646 states and 10820 transitions. [2023-12-02 18:58:31,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 7646 states and 10820 transitions. [2023-12-02 18:58:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 18:58:31,012 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:31,012 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] [2023-12-02 18:58:31,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 18:58:31,012 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:31,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 284998233, now seen corresponding path program 1 times [2023-12-02 18:58:31,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:31,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925354330] [2023-12-02 18:58:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:31,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:32,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:32,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925354330] [2023-12-02 18:58:32,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925354330] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:32,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:32,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 18:58:32,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267944965] [2023-12-02 18:58:32,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:32,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 18:58:32,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 18:58:32,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-12-02 18:58:32,278 INFO L87 Difference]: Start difference. First operand 7646 states and 10820 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:33,874 INFO L93 Difference]: Finished difference Result 8349 states and 11787 transitions. [2023-12-02 18:58:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 18:58:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 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 58 [2023-12-02 18:58:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:33,881 INFO L225 Difference]: With dead ends: 8349 [2023-12-02 18:58:33,882 INFO L226 Difference]: Without dead ends: 8347 [2023-12-02 18:58:33,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 18:58:33,884 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 811 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:33,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 1358 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 18:58:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8347 states. [2023-12-02 18:58:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8347 to 7649. [2023-12-02 18:58:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7649 states, 7648 states have (on average 1.4152719665271967) internal successors, (10824), 7648 states have internal predecessors, (10824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:33,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7649 states to 7649 states and 10824 transitions. [2023-12-02 18:58:33,984 INFO L78 Accepts]: Start accepts. Automaton has 7649 states and 10824 transitions. Word has length 58 [2023-12-02 18:58:33,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:33,984 INFO L495 AbstractCegarLoop]: Abstraction has 7649 states and 10824 transitions. [2023-12-02 18:58:33,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 7649 states and 10824 transitions. [2023-12-02 18:58:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 18:58:33,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:33,986 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] [2023-12-02 18:58:33,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 18:58:33,986 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:33,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash 646358649, now seen corresponding path program 1 times [2023-12-02 18:58:33,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:33,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782990634] [2023-12-02 18:58:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:33,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:34,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:34,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782990634] [2023-12-02 18:58:34,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782990634] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:34,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:34,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-12-02 18:58:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21184593] [2023-12-02 18:58:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:34,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:58:34,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:58:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:58:34,717 INFO L87 Difference]: Start difference. First operand 7649 states and 10824 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:35,247 INFO L93 Difference]: Finished difference Result 12234 states and 17264 transitions. [2023-12-02 18:58:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 18:58:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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 58 [2023-12-02 18:58:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:35,255 INFO L225 Difference]: With dead ends: 12234 [2023-12-02 18:58:35,255 INFO L226 Difference]: Without dead ends: 11416 [2023-12-02 18:58:35,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-12-02 18:58:35,258 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 667 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:35,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1252 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:58:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11416 states. [2023-12-02 18:58:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11416 to 7655. [2023-12-02 18:58:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7655 states, 7654 states have (on average 1.415207734517899) internal successors, (10832), 7654 states have internal predecessors, (10832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7655 states to 7655 states and 10832 transitions. [2023-12-02 18:58:35,335 INFO L78 Accepts]: Start accepts. Automaton has 7655 states and 10832 transitions. Word has length 58 [2023-12-02 18:58:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:35,335 INFO L495 AbstractCegarLoop]: Abstraction has 7655 states and 10832 transitions. [2023-12-02 18:58:35,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 7655 states and 10832 transitions. [2023-12-02 18:58:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 18:58:35,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:35,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:58:35,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 18:58:35,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:35,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1502387392, now seen corresponding path program 1 times [2023-12-02 18:58:35,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:35,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068799824] [2023-12-02 18:58:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:35,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:35,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068799824] [2023-12-02 18:58:35,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068799824] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:35,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:35,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:58:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246674530] [2023-12-02 18:58:35,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:35,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:58:35,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:35,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:58:35,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:58:35,380 INFO L87 Difference]: Start difference. First operand 7655 states and 10832 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:35,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:35,461 INFO L93 Difference]: Finished difference Result 13616 states and 19311 transitions. [2023-12-02 18:58:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:58:35,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-02 18:58:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:35,468 INFO L225 Difference]: With dead ends: 13616 [2023-12-02 18:58:35,468 INFO L226 Difference]: Without dead ends: 6158 [2023-12-02 18:58:35,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:58:35,475 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 110 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:35,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 303 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:58:35,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6158 states. [2023-12-02 18:58:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6158 to 5967. [2023-12-02 18:58:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5967 states, 5966 states have (on average 1.411163258464633) internal successors, (8419), 5966 states have internal predecessors, (8419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5967 states to 5967 states and 8419 transitions. [2023-12-02 18:58:35,548 INFO L78 Accepts]: Start accepts. Automaton has 5967 states and 8419 transitions. Word has length 59 [2023-12-02 18:58:35,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:35,548 INFO L495 AbstractCegarLoop]: Abstraction has 5967 states and 8419 transitions. [2023-12-02 18:58:35,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 5967 states and 8419 transitions. [2023-12-02 18:58:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 18:58:35,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:35,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:58:35,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 18:58:35,550 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:35,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1492852721, now seen corresponding path program 1 times [2023-12-02 18:58:35,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:35,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516896138] [2023-12-02 18:58:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:35,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:35,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:35,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516896138] [2023-12-02 18:58:35,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516896138] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:35,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:35,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:58:35,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736413715] [2023-12-02 18:58:35,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:35,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:58:35,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:35,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:58:35,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:58:35,586 INFO L87 Difference]: Start difference. First operand 5967 states and 8419 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:35,639 INFO L93 Difference]: Finished difference Result 10280 states and 14557 transitions. [2023-12-02 18:58:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:58:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-02 18:58:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:35,644 INFO L225 Difference]: With dead ends: 10280 [2023-12-02 18:58:35,644 INFO L226 Difference]: Without dead ends: 5712 [2023-12-02 18:58:35,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:58:35,647 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 117 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:35,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 287 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:58:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5712 states. [2023-12-02 18:58:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5712 to 5710. [2023-12-02 18:58:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 1.4076020318794886) internal successors, (8036), 5709 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:35,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 8036 transitions. [2023-12-02 18:58:35,694 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 8036 transitions. Word has length 59 [2023-12-02 18:58:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:35,694 INFO L495 AbstractCegarLoop]: Abstraction has 5710 states and 8036 transitions. [2023-12-02 18:58:35,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 8036 transitions. [2023-12-02 18:58:35,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 18:58:35,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:35,696 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] [2023-12-02 18:58:35,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 18:58:35,696 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:35,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1582018707, now seen corresponding path program 1 times [2023-12-02 18:58:35,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:35,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108970286] [2023-12-02 18:58:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:35,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:37,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:37,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108970286] [2023-12-02 18:58:37,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108970286] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:37,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:37,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-12-02 18:58:37,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265809185] [2023-12-02 18:58:37,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:37,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 18:58:37,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 18:58:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-12-02 18:58:37,896 INFO L87 Difference]: Start difference. First operand 5710 states and 8036 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:41,416 INFO L93 Difference]: Finished difference Result 6390 states and 8967 transitions. [2023-12-02 18:58:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-02 18:58:41,417 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-12-02 18:58:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:41,421 INFO L225 Difference]: With dead ends: 6390 [2023-12-02 18:58:41,421 INFO L226 Difference]: Without dead ends: 6388 [2023-12-02 18:58:41,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 18:58:41,423 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 965 mSDsluCounter, 2295 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:41,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 2543 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 18:58:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6388 states. [2023-12-02 18:58:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6388 to 5710. [2023-12-02 18:58:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 1.4076020318794886) internal successors, (8036), 5709 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 8036 transitions. [2023-12-02 18:58:41,470 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 8036 transitions. Word has length 60 [2023-12-02 18:58:41,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:41,470 INFO L495 AbstractCegarLoop]: Abstraction has 5710 states and 8036 transitions. [2023-12-02 18:58:41,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:41,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 8036 transitions. [2023-12-02 18:58:41,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 18:58:41,471 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:41,471 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] [2023-12-02 18:58:41,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 18:58:41,471 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:41,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1627940781, now seen corresponding path program 1 times [2023-12-02 18:58:41,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:41,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272611412] [2023-12-02 18:58:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:44,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272611412] [2023-12-02 18:58:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272611412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:44,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:44,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-12-02 18:58:44,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396993880] [2023-12-02 18:58:44,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:44,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 18:58:44,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 18:58:44,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-12-02 18:58:44,574 INFO L87 Difference]: Start difference. First operand 5710 states and 8036 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:49,516 INFO L93 Difference]: Finished difference Result 6365 states and 8940 transitions. [2023-12-02 18:58:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 18:58:49,516 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-12-02 18:58:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:49,521 INFO L225 Difference]: With dead ends: 6365 [2023-12-02 18:58:49,521 INFO L226 Difference]: Without dead ends: 6363 [2023-12-02 18:58:49,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=693, Invalid=2387, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 18:58:49,523 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1080 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 3393 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:49,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1901 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3393 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 18:58:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6363 states. [2023-12-02 18:58:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6363 to 5709. [2023-12-02 18:58:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 1.4074982480728802) internal successors, (8034), 5708 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 8034 transitions. [2023-12-02 18:58:49,572 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 8034 transitions. Word has length 60 [2023-12-02 18:58:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:49,572 INFO L495 AbstractCegarLoop]: Abstraction has 5709 states and 8034 transitions. [2023-12-02 18:58:49,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 8034 transitions. [2023-12-02 18:58:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 18:58:49,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:49,573 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] [2023-12-02 18:58:49,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 18:58:49,573 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:49,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:49,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1989301197, now seen corresponding path program 1 times [2023-12-02 18:58:49,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:49,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887544502] [2023-12-02 18:58:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:49,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:51,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:51,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887544502] [2023-12-02 18:58:51,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887544502] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:51,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:51,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-12-02 18:58:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307765163] [2023-12-02 18:58:51,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:51,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 18:58:51,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:51,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 18:58:51,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-12-02 18:58:51,691 INFO L87 Difference]: Start difference. First operand 5709 states and 8034 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:54,957 INFO L93 Difference]: Finished difference Result 7193 states and 10123 transitions. [2023-12-02 18:58:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 18:58:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-12-02 18:58:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:54,962 INFO L225 Difference]: With dead ends: 7193 [2023-12-02 18:58:54,962 INFO L226 Difference]: Without dead ends: 6423 [2023-12-02 18:58:54,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=545, Invalid=1807, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 18:58:54,964 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 989 mSDsluCounter, 1915 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:54,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 2174 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 18:58:54,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6423 states. [2023-12-02 18:58:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6423 to 6061. [2023-12-02 18:58:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6061 states, 6060 states have (on average 1.4057755775577558) internal successors, (8519), 6060 states have internal predecessors, (8519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6061 states to 6061 states and 8519 transitions. [2023-12-02 18:58:55,014 INFO L78 Accepts]: Start accepts. Automaton has 6061 states and 8519 transitions. Word has length 60 [2023-12-02 18:58:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:55,014 INFO L495 AbstractCegarLoop]: Abstraction has 6061 states and 8519 transitions. [2023-12-02 18:58:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6061 states and 8519 transitions. [2023-12-02 18:58:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 18:58:55,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:55,016 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] [2023-12-02 18:58:55,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 18:58:55,016 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:55,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash -382878835, now seen corresponding path program 1 times [2023-12-02 18:58:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:55,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849690961] [2023-12-02 18:58:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:55,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:56,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:56,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849690961] [2023-12-02 18:58:56,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849690961] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:56,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:56,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-12-02 18:58:56,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245895208] [2023-12-02 18:58:56,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:56,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 18:58:56,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:56,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 18:58:56,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-12-02 18:58:56,913 INFO L87 Difference]: Start difference. First operand 6061 states and 8519 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:59,187 INFO L93 Difference]: Finished difference Result 7109 states and 9980 transitions. [2023-12-02 18:58:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 18:58:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-12-02 18:58:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:59,193 INFO L225 Difference]: With dead ends: 7109 [2023-12-02 18:58:59,193 INFO L226 Difference]: Without dead ends: 7107 [2023-12-02 18:58:59,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=472, Invalid=1508, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 18:58:59,195 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 826 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:59,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1329 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1705 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 18:58:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7107 states. [2023-12-02 18:58:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7107 to 6065. [2023-12-02 18:58:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6065 states, 6064 states have (on average 1.4056728232189974) internal successors, (8524), 6064 states have internal predecessors, (8524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6065 states to 6065 states and 8524 transitions. [2023-12-02 18:58:59,246 INFO L78 Accepts]: Start accepts. Automaton has 6065 states and 8524 transitions. Word has length 60 [2023-12-02 18:58:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:59,246 INFO L495 AbstractCegarLoop]: Abstraction has 6065 states and 8524 transitions. [2023-12-02 18:58:59,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6065 states and 8524 transitions. [2023-12-02 18:58:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 18:58:59,247 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:59,247 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] [2023-12-02 18:58:59,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 18:58:59,248 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:59,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash 894962711, now seen corresponding path program 1 times [2023-12-02 18:58:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:59,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170908955] [2023-12-02 18:58:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:59,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:59,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170908955] [2023-12-02 18:58:59,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170908955] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:59,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:59,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:58:59,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988442199] [2023-12-02 18:58:59,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:59,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:58:59,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:58:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:58:59,280 INFO L87 Difference]: Start difference. First operand 6065 states and 8524 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:59,357 INFO L93 Difference]: Finished difference Result 10943 states and 15445 transitions. [2023-12-02 18:58:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:58:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-02 18:58:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:59,362 INFO L225 Difference]: With dead ends: 10943 [2023-12-02 18:58:59,362 INFO L226 Difference]: Without dead ends: 5851 [2023-12-02 18:58:59,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:58:59,366 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 105 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:59,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 291 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:58:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2023-12-02 18:58:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 5847. [2023-12-02 18:58:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5847 states, 5846 states have (on average 1.4031816626753335) internal successors, (8203), 5846 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5847 states to 5847 states and 8203 transitions. [2023-12-02 18:58:59,412 INFO L78 Accepts]: Start accepts. Automaton has 5847 states and 8203 transitions. Word has length 61 [2023-12-02 18:58:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:59,413 INFO L495 AbstractCegarLoop]: Abstraction has 5847 states and 8203 transitions. [2023-12-02 18:58:59,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5847 states and 8203 transitions. [2023-12-02 18:58:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 18:58:59,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:59,414 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] [2023-12-02 18:58:59,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 18:58:59,414 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:59,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash 555276098, now seen corresponding path program 1 times [2023-12-02 18:58:59,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:59,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396224365] [2023-12-02 18:58:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:59,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:58:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:58:59,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:58:59,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396224365] [2023-12-02 18:58:59,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396224365] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:58:59,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:58:59,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:58:59,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026709736] [2023-12-02 18:58:59,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:58:59,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:58:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:58:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:58:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:58:59,453 INFO L87 Difference]: Start difference. First operand 5847 states and 8203 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:58:59,501 INFO L93 Difference]: Finished difference Result 10539 states and 14852 transitions. [2023-12-02 18:58:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:58:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-02 18:58:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:58:59,504 INFO L225 Difference]: With dead ends: 10539 [2023-12-02 18:58:59,504 INFO L226 Difference]: Without dead ends: 5575 [2023-12-02 18:58:59,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:58:59,508 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 106 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:58:59,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 283 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:58:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2023-12-02 18:58:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 5573. [2023-12-02 18:58:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5573 states, 5572 states have (on average 1.400394831299354) internal successors, (7803), 5572 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5573 states to 5573 states and 7803 transitions. [2023-12-02 18:58:59,550 INFO L78 Accepts]: Start accepts. Automaton has 5573 states and 7803 transitions. Word has length 61 [2023-12-02 18:58:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:58:59,550 INFO L495 AbstractCegarLoop]: Abstraction has 5573 states and 7803 transitions. [2023-12-02 18:58:59,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:58:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5573 states and 7803 transitions. [2023-12-02 18:58:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 18:58:59,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:58:59,551 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] [2023-12-02 18:58:59,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 18:58:59,551 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:58:59,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:58:59,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1694720993, now seen corresponding path program 1 times [2023-12-02 18:58:59,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:58:59,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668382921] [2023-12-02 18:58:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:58:59,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:58:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:08,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:08,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668382921] [2023-12-02 18:59:08,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668382921] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:08,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:59:08,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2023-12-02 18:59:08,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366927534] [2023-12-02 18:59:08,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:08,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 18:59:08,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:08,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 18:59:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 18:59:08,046 INFO L87 Difference]: Start difference. First operand 5573 states and 7803 transitions. Second operand has 38 states, 38 states have (on average 1.631578947368421) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:21,039 INFO L93 Difference]: Finished difference Result 6147 states and 8601 transitions. [2023-12-02 18:59:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-02 18:59:21,040 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.631578947368421) internal successors, (62), 37 states have internal predecessors, (62), 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 62 [2023-12-02 18:59:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:21,045 INFO L225 Difference]: With dead ends: 6147 [2023-12-02 18:59:21,045 INFO L226 Difference]: Without dead ends: 6145 [2023-12-02 18:59:21,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=965, Invalid=3457, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 18:59:21,048 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 695 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 3569 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:21,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 2193 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3569 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-02 18:59:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2023-12-02 18:59:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 5561. [2023-12-02 18:59:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5561 states, 5560 states have (on average 1.4012589928057555) internal successors, (7791), 5560 states have internal predecessors, (7791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5561 states to 5561 states and 7791 transitions. [2023-12-02 18:59:21,104 INFO L78 Accepts]: Start accepts. Automaton has 5561 states and 7791 transitions. Word has length 62 [2023-12-02 18:59:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:21,104 INFO L495 AbstractCegarLoop]: Abstraction has 5561 states and 7791 transitions. [2023-12-02 18:59:21,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.631578947368421) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 5561 states and 7791 transitions. [2023-12-02 18:59:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 18:59:21,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:21,105 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:21,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 18:59:21,106 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:21,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash -125231188, now seen corresponding path program 1 times [2023-12-02 18:59:21,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:21,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404078919] [2023-12-02 18:59:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:21,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:21,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:21,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404078919] [2023-12-02 18:59:21,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404078919] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:21,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:59:21,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:59:21,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952712811] [2023-12-02 18:59:21,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:21,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:59:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:21,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:59:21,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:59:21,179 INFO L87 Difference]: Start difference. First operand 5561 states and 7791 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:21,227 INFO L93 Difference]: Finished difference Result 9110 states and 12941 transitions. [2023-12-02 18:59:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:59:21,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-12-02 18:59:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:21,233 INFO L225 Difference]: With dead ends: 9110 [2023-12-02 18:59:21,233 INFO L226 Difference]: Without dead ends: 6932 [2023-12-02 18:59:21,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:59:21,236 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 80 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:21,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 338 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:59:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2023-12-02 18:59:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6533. [2023-12-02 18:59:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 6532 states have (on average 1.4021739130434783) internal successors, (9159), 6532 states have internal predecessors, (9159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 9159 transitions. [2023-12-02 18:59:21,325 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 9159 transitions. Word has length 67 [2023-12-02 18:59:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:21,325 INFO L495 AbstractCegarLoop]: Abstraction has 6533 states and 9159 transitions. [2023-12-02 18:59:21,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 9159 transitions. [2023-12-02 18:59:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 18:59:21,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:21,327 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:21,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 18:59:21,327 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:21,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1880437135, now seen corresponding path program 1 times [2023-12-02 18:59:21,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:21,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527815286] [2023-12-02 18:59:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:21,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:21,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527815286] [2023-12-02 18:59:21,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527815286] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:21,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:59:21,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:59:21,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882149375] [2023-12-02 18:59:21,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:21,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:59:21,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:59:21,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:59:21,399 INFO L87 Difference]: Start difference. First operand 6533 states and 9159 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:21,458 INFO L93 Difference]: Finished difference Result 13043 states and 18433 transitions. [2023-12-02 18:59:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:59:21,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2023-12-02 18:59:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:21,464 INFO L225 Difference]: With dead ends: 13043 [2023-12-02 18:59:21,464 INFO L226 Difference]: Without dead ends: 8837 [2023-12-02 18:59:21,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:59:21,468 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 75 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:21,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 319 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:59:21,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8837 states. [2023-12-02 18:59:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8837 to 8141. [2023-12-02 18:59:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8141 states, 8140 states have (on average 1.3981572481572482) internal successors, (11381), 8140 states have internal predecessors, (11381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8141 states to 8141 states and 11381 transitions. [2023-12-02 18:59:21,546 INFO L78 Accepts]: Start accepts. Automaton has 8141 states and 11381 transitions. Word has length 70 [2023-12-02 18:59:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:21,546 INFO L495 AbstractCegarLoop]: Abstraction has 8141 states and 11381 transitions. [2023-12-02 18:59:21,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8141 states and 11381 transitions. [2023-12-02 18:59:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 18:59:21,548 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:21,549 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:21,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 18:59:21,549 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:21,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:21,549 INFO L85 PathProgramCache]: Analyzing trace with hash 317334392, now seen corresponding path program 1 times [2023-12-02 18:59:21,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:21,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217561112] [2023-12-02 18:59:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:21,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:21,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:21,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217561112] [2023-12-02 18:59:21,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217561112] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:21,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:59:21,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:59:21,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681464808] [2023-12-02 18:59:21,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:21,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:59:21,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:59:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:59:21,650 INFO L87 Difference]: Start difference. First operand 8141 states and 11381 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:21,729 INFO L93 Difference]: Finished difference Result 18819 states and 26439 transitions. [2023-12-02 18:59:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:59:21,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2023-12-02 18:59:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:21,741 INFO L225 Difference]: With dead ends: 18819 [2023-12-02 18:59:21,741 INFO L226 Difference]: Without dead ends: 11873 [2023-12-02 18:59:21,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:59:21,747 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 70 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:21,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 300 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:59:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11873 states. [2023-12-02 18:59:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11873 to 10683. [2023-12-02 18:59:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10683 states, 10682 states have (on average 1.390282718592024) internal successors, (14851), 10682 states have internal predecessors, (14851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10683 states to 10683 states and 14851 transitions. [2023-12-02 18:59:21,839 INFO L78 Accepts]: Start accepts. Automaton has 10683 states and 14851 transitions. Word has length 73 [2023-12-02 18:59:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:21,839 INFO L495 AbstractCegarLoop]: Abstraction has 10683 states and 14851 transitions. [2023-12-02 18:59:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 10683 states and 14851 transitions. [2023-12-02 18:59:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 18:59:21,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:21,841 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:21,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 18:59:21,841 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:21,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:21,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1712434679, now seen corresponding path program 1 times [2023-12-02 18:59:21,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:21,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623320743] [2023-12-02 18:59:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:21,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:21,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:21,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623320743] [2023-12-02 18:59:21,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623320743] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:21,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:59:21,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:59:21,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974315775] [2023-12-02 18:59:21,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:21,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:59:21,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:59:21,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:59:21,928 INFO L87 Difference]: Start difference. First operand 10683 states and 14851 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:22,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:22,006 INFO L93 Difference]: Finished difference Result 25849 states and 36052 transitions. [2023-12-02 18:59:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:59:22,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2023-12-02 18:59:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:22,018 INFO L225 Difference]: With dead ends: 25849 [2023-12-02 18:59:22,018 INFO L226 Difference]: Without dead ends: 15127 [2023-12-02 18:59:22,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:59:22,027 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 65 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:22,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 279 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:59:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15127 states. [2023-12-02 18:59:22,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15127 to 13699. [2023-12-02 18:59:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13699 states, 13698 states have (on average 1.3820995765805226) internal successors, (18932), 13698 states have internal predecessors, (18932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13699 states to 13699 states and 18932 transitions. [2023-12-02 18:59:22,179 INFO L78 Accepts]: Start accepts. Automaton has 13699 states and 18932 transitions. Word has length 76 [2023-12-02 18:59:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:22,179 INFO L495 AbstractCegarLoop]: Abstraction has 13699 states and 18932 transitions. [2023-12-02 18:59:22,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 13699 states and 18932 transitions. [2023-12-02 18:59:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 18:59:22,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:22,182 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:22,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 18:59:22,182 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:22,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash -731989537, now seen corresponding path program 1 times [2023-12-02 18:59:22,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:22,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603635001] [2023-12-02 18:59:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:22,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:59:22,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:22,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603635001] [2023-12-02 18:59:22,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603635001] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:22,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:59:22,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:59:22,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891042710] [2023-12-02 18:59:22,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:22,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:59:22,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:22,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:59:22,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:59:22,350 INFO L87 Difference]: Start difference. First operand 13699 states and 18932 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 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) [2023-12-02 18:59:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:22,686 INFO L93 Difference]: Finished difference Result 46884 states and 64854 transitions. [2023-12-02 18:59:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:59:22,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 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 92 [2023-12-02 18:59:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:22,712 INFO L225 Difference]: With dead ends: 46884 [2023-12-02 18:59:22,712 INFO L226 Difference]: Without dead ends: 33865 [2023-12-02 18:59:22,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:59:22,724 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1119 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:22,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 324 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:59:22,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33865 states. [2023-12-02 18:59:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33865 to 25846. [2023-12-02 18:59:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25846 states, 25845 states have (on average 1.3559682723931128) internal successors, (35045), 25845 states have internal predecessors, (35045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25846 states to 25846 states and 35045 transitions. [2023-12-02 18:59:23,016 INFO L78 Accepts]: Start accepts. Automaton has 25846 states and 35045 transitions. Word has length 92 [2023-12-02 18:59:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:23,016 INFO L495 AbstractCegarLoop]: Abstraction has 25846 states and 35045 transitions. [2023-12-02 18:59:23,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 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) [2023-12-02 18:59:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 25846 states and 35045 transitions. [2023-12-02 18:59:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 18:59:23,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:23,020 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:23,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 18:59:23,021 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:23,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash 885515354, now seen corresponding path program 1 times [2023-12-02 18:59:23,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:23,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381245631] [2023-12-02 18:59:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:24,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:24,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381245631] [2023-12-02 18:59:24,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381245631] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:59:24,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937735878] [2023-12-02 18:59:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:24,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:59:24,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:59:24,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:59:24,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bdc977-aeda-444e-91d2-0f97dc49ac17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:59:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:24,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 110 conjunts are in the unsatisfiable core [2023-12-02 18:59:24,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:59:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:29,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:00:47,741 WARN L293 SmtUtils]: Spent 24.65s on a formula simplification. DAG size of input: 413 DAG size of output: 365 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:02:53,763 WARN L293 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 365 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:08:27,471 WARN L293 SmtUtils]: Spent 6.46s on a formula simplification that was a NOOP. DAG size: 369 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)