./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06f1e7cb4ad4b39445b3c30d820384fbedafa8e52cac3d3c0cb4d178fb229699 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:46:48,505 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:46:48,640 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:46:48,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:46:48,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:46:48,688 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:46:48,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:46:48,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:46:48,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:46:48,696 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:46:48,696 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:46:48,697 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:46:48,698 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:46:48,699 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:46:48,700 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:46:48,700 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:46:48,701 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:46:48,701 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:46:48,701 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:46:48,702 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:46:48,702 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:46:48,703 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:46:48,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:46:48,705 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:46:48,705 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:46:48,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:46:48,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:46:48,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:46:48,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:46:48,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:46:48,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:46:48,709 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:46:48,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:46:48,709 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:46:48,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:46:48,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:46:48,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:46:48,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:46:48,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:46:48,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:46:48,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:46:48,712 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:46:48,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:46:48,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:46:48,713 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:46:48,713 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:46:48,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:46:48,713 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_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06f1e7cb4ad4b39445b3c30d820384fbedafa8e52cac3d3c0cb4d178fb229699 [2023-11-21 19:46:49,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:46:49,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:46:49,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:46:49,127 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:46:49,128 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:46:49,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-11-21 19:46:52,194 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:46:52,490 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:46:52,491 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-11-21 19:46:52,506 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/data/b27049c3f/32bb145b6c48409b8618b7cd1458ec97/FLAG780a2a65d [2023-11-21 19:46:52,521 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/data/b27049c3f/32bb145b6c48409b8618b7cd1458ec97 [2023-11-21 19:46:52,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:46:52,530 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:46:52,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:46:52,534 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:46:52,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:46:52,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:46:52" (1/1) ... [2023-11-21 19:46:52,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5331869a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:52, skipping insertion in model container [2023-11-21 19:46:52,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:46:52" (1/1) ... [2023-11-21 19:46:52,619 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:46:53,028 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_71bf7861-04ab-4002-b8d7-9ead81b347a2/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[11714,11727] [2023-11-21 19:46:53,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:46:53,133 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:46:53,210 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_71bf7861-04ab-4002-b8d7-9ead81b347a2/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[11714,11727] [2023-11-21 19:46:53,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:46:53,278 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:46:53,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53 WrapperNode [2023-11-21 19:46:53,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:46:53,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:46:53,281 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:46:53,281 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:46:53,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,327 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,393 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1031 [2023-11-21 19:46:53,393 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:46:53,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:46:53,394 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:46:53,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:46:53,437 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,438 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,459 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,525 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,528 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,533 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:46:53,547 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:46:53,550 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:46:53,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:46:53,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (1/1) ... [2023-11-21 19:46:53,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:46:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:46:53,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:46:53,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71bf7861-04ab-4002-b8d7-9ead81b347a2/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:46:53,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:46:53,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:46:53,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:46:53,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:46:53,851 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:46:53,853 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:46:54,840 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:46:55,181 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:46:55,182 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:46:55,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:46:55 BoogieIcfgContainer [2023-11-21 19:46:55,184 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:46:55,187 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:46:55,187 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:46:55,191 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:46:55,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:46:52" (1/3) ... [2023-11-21 19:46:55,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3deaa0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:46:55, skipping insertion in model container [2023-11-21 19:46:55,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:53" (2/3) ... [2023-11-21 19:46:55,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3deaa0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:46:55, skipping insertion in model container [2023-11-21 19:46:55,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:46:55" (3/3) ... [2023-11-21 19:46:55,197 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-11-21 19:46:55,214 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:46:55,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:46:55,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:46:55,277 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;@29da055a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:46:55,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:46:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 215 states, 172 states have (on average 1.6453488372093024) internal successors, (283), 214 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-21 19:46:55,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:55,296 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] [2023-11-21 19:46:55,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:55,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:55,303 INFO L85 PathProgramCache]: Analyzing trace with hash 314714078, now seen corresponding path program 1 times [2023-11-21 19:46:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:55,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853518701] [2023-11-21 19:46:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:55,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:46:55,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:55,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853518701] [2023-11-21 19:46:55,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853518701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:55,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:55,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:46:55,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631637926] [2023-11-21 19:46:55,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:55,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:46:55,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:46:56,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:46:56,012 INFO L87 Difference]: Start difference. First operand has 215 states, 172 states have (on average 1.6453488372093024) internal successors, (283), 214 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:56,284 INFO L93 Difference]: Finished difference Result 352 states and 486 transitions. [2023-11-21 19:46:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:46:56,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2023-11-21 19:46:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:56,300 INFO L225 Difference]: With dead ends: 352 [2023-11-21 19:46:56,301 INFO L226 Difference]: Without dead ends: 172 [2023-11-21 19:46:56,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:46:56,312 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 200 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:56,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 554 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:46:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-21 19:46:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2023-11-21 19:46:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.3742690058479532) internal successors, (235), 171 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 235 transitions. [2023-11-21 19:46:56,395 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 235 transitions. Word has length 51 [2023-11-21 19:46:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:56,396 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 235 transitions. [2023-11-21 19:46:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 235 transitions. [2023-11-21 19:46:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-21 19:46:56,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:56,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:56,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:46:56,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:56,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1108893757, now seen corresponding path program 1 times [2023-11-21 19:46:56,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:56,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93375944] [2023-11-21 19:46:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:56,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:46:56,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93375944] [2023-11-21 19:46:56,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93375944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:56,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:56,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:46:56,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484656553] [2023-11-21 19:46:56,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:56,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:46:56,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:46:56,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:56,604 INFO L87 Difference]: Start difference. First operand 172 states and 235 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:56,683 INFO L93 Difference]: Finished difference Result 374 states and 534 transitions. [2023-11-21 19:46:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:46:56,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2023-11-21 19:46:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:56,686 INFO L225 Difference]: With dead ends: 374 [2023-11-21 19:46:56,686 INFO L226 Difference]: Without dead ends: 250 [2023-11-21 19:46:56,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:56,689 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 130 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:56,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 371 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:46:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-21 19:46:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2023-11-21 19:46:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.4048582995951417) internal successors, (347), 247 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 347 transitions. [2023-11-21 19:46:56,708 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 347 transitions. Word has length 90 [2023-11-21 19:46:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:56,709 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 347 transitions. [2023-11-21 19:46:56,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 347 transitions. [2023-11-21 19:46:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-21 19:46:56,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:56,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:56,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:46:56,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:56,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1541340416, now seen corresponding path program 1 times [2023-11-21 19:46:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:56,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789675137] [2023-11-21 19:46:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:46:56,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:56,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789675137] [2023-11-21 19:46:56,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789675137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:56,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:56,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:46:56,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119294805] [2023-11-21 19:46:56,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:56,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:46:56,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:56,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:46:56,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:56,874 INFO L87 Difference]: Start difference. First operand 248 states and 347 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:56,985 INFO L93 Difference]: Finished difference Result 580 states and 839 transitions. [2023-11-21 19:46:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:46:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2023-11-21 19:46:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:56,991 INFO L225 Difference]: With dead ends: 580 [2023-11-21 19:46:56,992 INFO L226 Difference]: Without dead ends: 386 [2023-11-21 19:46:56,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:57,001 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 124 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:57,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 367 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:46:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-21 19:46:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2023-11-21 19:46:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.4281984334203655) internal successors, (547), 383 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 547 transitions. [2023-11-21 19:46:57,047 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 547 transitions. Word has length 96 [2023-11-21 19:46:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:57,053 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 547 transitions. [2023-11-21 19:46:57,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 547 transitions. [2023-11-21 19:46:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-21 19:46:57,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:57,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:57,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:46:57,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:57,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:57,059 INFO L85 PathProgramCache]: Analyzing trace with hash 224225481, now seen corresponding path program 1 times [2023-11-21 19:46:57,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:57,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724407385] [2023-11-21 19:46:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:57,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:46:57,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:57,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724407385] [2023-11-21 19:46:57,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724407385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:57,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:57,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:46:57,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894758282] [2023-11-21 19:46:57,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:57,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:46:57,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:57,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:46:57,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:57,272 INFO L87 Difference]: Start difference. First operand 384 states and 547 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:57,346 INFO L93 Difference]: Finished difference Result 950 states and 1384 transitions. [2023-11-21 19:46:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:46:57,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2023-11-21 19:46:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:57,352 INFO L225 Difference]: With dead ends: 950 [2023-11-21 19:46:57,352 INFO L226 Difference]: Without dead ends: 626 [2023-11-21 19:46:57,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:57,365 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 118 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:57,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 363 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:46:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-21 19:46:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 624. [2023-11-21 19:46:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.4414125200642054) internal successors, (898), 623 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 898 transitions. [2023-11-21 19:46:57,409 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 898 transitions. Word has length 102 [2023-11-21 19:46:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:57,413 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 898 transitions. [2023-11-21 19:46:57,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 898 transitions. [2023-11-21 19:46:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-21 19:46:57,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:57,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:57,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:46:57,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:57,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:57,422 INFO L85 PathProgramCache]: Analyzing trace with hash 907045350, now seen corresponding path program 1 times [2023-11-21 19:46:57,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:57,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411771381] [2023-11-21 19:46:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:57,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:46:57,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:57,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411771381] [2023-11-21 19:46:57,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411771381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:57,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:57,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:46:57,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821344662] [2023-11-21 19:46:57,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:57,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:46:57,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:46:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:57,608 INFO L87 Difference]: Start difference. First operand 624 states and 898 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:57,684 INFO L93 Difference]: Finished difference Result 1600 states and 2334 transitions. [2023-11-21 19:46:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:46:57,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2023-11-21 19:46:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:57,690 INFO L225 Difference]: With dead ends: 1600 [2023-11-21 19:46:57,690 INFO L226 Difference]: Without dead ends: 1042 [2023-11-21 19:46:57,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:57,694 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 112 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:57,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 359 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:46:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2023-11-21 19:46:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1040. [2023-11-21 19:46:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 1.4446583253128007) internal successors, (1501), 1039 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1501 transitions. [2023-11-21 19:46:57,722 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1501 transitions. Word has length 108 [2023-11-21 19:46:57,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:57,724 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1501 transitions. [2023-11-21 19:46:57,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1501 transitions. [2023-11-21 19:46:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-21 19:46:57,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:57,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:46:57,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:57,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1969865901, now seen corresponding path program 1 times [2023-11-21 19:46:57,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:57,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287114491] [2023-11-21 19:46:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:57,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:46:57,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:57,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287114491] [2023-11-21 19:46:57,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287114491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:57,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:57,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:46:57,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058503019] [2023-11-21 19:46:57,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:57,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:46:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:46:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:57,907 INFO L87 Difference]: Start difference. First operand 1040 states and 1501 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:57,985 INFO L93 Difference]: Finished difference Result 2714 states and 3944 transitions. [2023-11-21 19:46:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:46:57,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2023-11-21 19:46:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:58,001 INFO L225 Difference]: With dead ends: 2714 [2023-11-21 19:46:58,002 INFO L226 Difference]: Without dead ends: 1746 [2023-11-21 19:46:58,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:58,004 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 106 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:58,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 375 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:46:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2023-11-21 19:46:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1744. [2023-11-21 19:46:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 1.4388984509466438) internal successors, (2508), 1743 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2508 transitions. [2023-11-21 19:46:58,075 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2508 transitions. Word has length 114 [2023-11-21 19:46:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:58,077 INFO L495 AbstractCegarLoop]: Abstraction has 1744 states and 2508 transitions. [2023-11-21 19:46:58,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2508 transitions. [2023-11-21 19:46:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-21 19:46:58,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:58,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:58,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:46:58,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:58,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash 287047262, now seen corresponding path program 1 times [2023-11-21 19:46:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537268440] [2023-11-21 19:46:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:58,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:46:58,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:58,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537268440] [2023-11-21 19:46:58,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537268440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:58,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:58,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:46:58,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220373132] [2023-11-21 19:46:58,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:58,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:46:58,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:58,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:46:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:58,272 INFO L87 Difference]: Start difference. First operand 1744 states and 2508 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:58,353 INFO L93 Difference]: Finished difference Result 4564 states and 6574 transitions. [2023-11-21 19:46:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:46:58,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2023-11-21 19:46:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:58,368 INFO L225 Difference]: With dead ends: 4564 [2023-11-21 19:46:58,368 INFO L226 Difference]: Without dead ends: 2898 [2023-11-21 19:46:58,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:58,372 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 100 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:58,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 351 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:46:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2023-11-21 19:46:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2896. [2023-11-21 19:46:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 1.4241796200345422) internal successors, (4123), 2895 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4123 transitions. [2023-11-21 19:46:58,451 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4123 transitions. Word has length 120 [2023-11-21 19:46:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:58,452 INFO L495 AbstractCegarLoop]: Abstraction has 2896 states and 4123 transitions. [2023-11-21 19:46:58,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4123 transitions. [2023-11-21 19:46:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-21 19:46:58,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:58,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:58,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:46:58,460 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:58,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash -806011336, now seen corresponding path program 1 times [2023-11-21 19:46:58,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:58,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138502197] [2023-11-21 19:46:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:58,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:46:58,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:58,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138502197] [2023-11-21 19:46:58,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138502197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:58,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:58,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:46:58,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694298016] [2023-11-21 19:46:58,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:46:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:46:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:46:58,832 INFO L87 Difference]: Start difference. First operand 2896 states and 4123 transitions. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:59,727 INFO L93 Difference]: Finished difference Result 10116 states and 14367 transitions. [2023-11-21 19:46:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 19:46:59,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2023-11-21 19:46:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:59,768 INFO L225 Difference]: With dead ends: 10116 [2023-11-21 19:46:59,768 INFO L226 Difference]: Without dead ends: 7303 [2023-11-21 19:46:59,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-11-21 19:46:59,777 INFO L413 NwaCegarLoop]: 999 mSDtfsCounter, 1179 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 3803 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:59,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 3803 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 19:46:59,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7303 states. [2023-11-21 19:46:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7303 to 3785. [2023-11-21 19:46:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3784 states have (on average 1.391384778012685) internal successors, (5265), 3784 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5265 transitions. [2023-11-21 19:46:59,945 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5265 transitions. Word has length 126 [2023-11-21 19:46:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:59,945 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 5265 transitions. [2023-11-21 19:46:59,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:46:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5265 transitions. [2023-11-21 19:46:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-21 19:46:59,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:59,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:59,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 19:46:59,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:59,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2117463422, now seen corresponding path program 1 times [2023-11-21 19:46:59,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:59,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768710962] [2023-11-21 19:46:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:00,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:00,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768710962] [2023-11-21 19:47:00,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768710962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:00,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:00,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:00,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098864047] [2023-11-21 19:47:00,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:00,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:00,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:00,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:00,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:00,132 INFO L87 Difference]: Start difference. First operand 3785 states and 5265 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:00,256 INFO L93 Difference]: Finished difference Result 9023 states and 12655 transitions. [2023-11-21 19:47:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:00,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2023-11-21 19:47:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:00,285 INFO L225 Difference]: With dead ends: 9023 [2023-11-21 19:47:00,286 INFO L226 Difference]: Without dead ends: 5320 [2023-11-21 19:47:00,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:00,294 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 149 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:00,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 420 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2023-11-21 19:47:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 5318. [2023-11-21 19:47:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5318 states, 5317 states have (on average 1.3953357156291142) internal successors, (7419), 5317 states have internal predecessors, (7419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 7419 transitions. [2023-11-21 19:47:00,452 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 7419 transitions. Word has length 128 [2023-11-21 19:47:00,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:00,453 INFO L495 AbstractCegarLoop]: Abstraction has 5318 states and 7419 transitions. [2023-11-21 19:47:00,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:00,453 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 7419 transitions. [2023-11-21 19:47:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-21 19:47:00,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:00,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:00,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 19:47:00,469 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:00,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash 462293507, now seen corresponding path program 1 times [2023-11-21 19:47:00,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:00,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394807131] [2023-11-21 19:47:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:00,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:01,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:01,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394807131] [2023-11-21 19:47:01,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394807131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:01,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:01,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:47:01,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696214964] [2023-11-21 19:47:01,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:01,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:47:01,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:47:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:47:01,166 INFO L87 Difference]: Start difference. First operand 5318 states and 7419 transitions. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:01,759 INFO L93 Difference]: Finished difference Result 10555 states and 14743 transitions. [2023-11-21 19:47:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:47:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2023-11-21 19:47:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:01,790 INFO L225 Difference]: With dead ends: 10555 [2023-11-21 19:47:01,790 INFO L226 Difference]: Without dead ends: 5320 [2023-11-21 19:47:01,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:47:01,798 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 436 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:01,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 869 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:47:01,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2023-11-21 19:47:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 5318. [2023-11-21 19:47:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5318 states, 5317 states have (on average 1.3945834116983262) internal successors, (7415), 5317 states have internal predecessors, (7415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 7415 transitions. [2023-11-21 19:47:01,938 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 7415 transitions. Word has length 128 [2023-11-21 19:47:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:01,938 INFO L495 AbstractCegarLoop]: Abstraction has 5318 states and 7415 transitions. [2023-11-21 19:47:01,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 7415 transitions. [2023-11-21 19:47:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:01,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:01,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:01,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 19:47:01,951 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:01,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1405144165, now seen corresponding path program 1 times [2023-11-21 19:47:01,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:01,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619489204] [2023-11-21 19:47:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:01,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:02,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619489204] [2023-11-21 19:47:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619489204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:02,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:02,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889768484] [2023-11-21 19:47:02,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:02,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:02,073 INFO L87 Difference]: Start difference. First operand 5318 states and 7415 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:02,388 INFO L93 Difference]: Finished difference Result 13592 states and 18960 transitions. [2023-11-21 19:47:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:02,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:02,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:02,435 INFO L225 Difference]: With dead ends: 13592 [2023-11-21 19:47:02,436 INFO L226 Difference]: Without dead ends: 8867 [2023-11-21 19:47:02,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:02,444 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 133 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:02,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 354 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:47:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2023-11-21 19:47:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 8865. [2023-11-21 19:47:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8865 states, 8864 states have (on average 1.3775947653429603) internal successors, (12211), 8864 states have internal predecessors, (12211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8865 states to 8865 states and 12211 transitions. [2023-11-21 19:47:02,692 INFO L78 Accepts]: Start accepts. Automaton has 8865 states and 12211 transitions. Word has length 129 [2023-11-21 19:47:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:02,692 INFO L495 AbstractCegarLoop]: Abstraction has 8865 states and 12211 transitions. [2023-11-21 19:47:02,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 8865 states and 12211 transitions. [2023-11-21 19:47:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:02,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:02,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:02,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 19:47:02,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:02,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash 32021728, now seen corresponding path program 1 times [2023-11-21 19:47:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484842281] [2023-11-21 19:47:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:02,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:02,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484842281] [2023-11-21 19:47:02,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484842281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:02,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:02,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:02,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961866615] [2023-11-21 19:47:02,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:02,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:02,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:02,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:02,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:02,886 INFO L87 Difference]: Start difference. First operand 8865 states and 12211 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:03,255 INFO L93 Difference]: Finished difference Result 25527 states and 35130 transitions. [2023-11-21 19:47:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:03,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:03,297 INFO L225 Difference]: With dead ends: 25527 [2023-11-21 19:47:03,298 INFO L226 Difference]: Without dead ends: 17525 [2023-11-21 19:47:03,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:03,313 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 133 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:03,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 252 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:47:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17525 states. [2023-11-21 19:47:03,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17525 to 17523. [2023-11-21 19:47:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17523 states, 17522 states have (on average 1.3649126812007761) internal successors, (23916), 17522 states have internal predecessors, (23916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17523 states to 17523 states and 23916 transitions. [2023-11-21 19:47:03,902 INFO L78 Accepts]: Start accepts. Automaton has 17523 states and 23916 transitions. Word has length 129 [2023-11-21 19:47:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:03,902 INFO L495 AbstractCegarLoop]: Abstraction has 17523 states and 23916 transitions. [2023-11-21 19:47:03,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 17523 states and 23916 transitions. [2023-11-21 19:47:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:03,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:03,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:03,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 19:47:03,954 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:03,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:03,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1110932805, now seen corresponding path program 1 times [2023-11-21 19:47:03,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:03,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641940729] [2023-11-21 19:47:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:03,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:04,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:04,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641940729] [2023-11-21 19:47:04,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641940729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:04,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:04,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:04,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451651174] [2023-11-21 19:47:04,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:04,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:04,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:04,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:04,141 INFO L87 Difference]: Start difference. First operand 17523 states and 23916 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:04,544 INFO L93 Difference]: Finished difference Result 42654 states and 58293 transitions. [2023-11-21 19:47:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:04,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:04,612 INFO L225 Difference]: With dead ends: 42654 [2023-11-21 19:47:04,613 INFO L226 Difference]: Without dead ends: 26808 [2023-11-21 19:47:04,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:04,639 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 118 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:04,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 349 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:47:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26808 states. [2023-11-21 19:47:05,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26808 to 26806. [2023-11-21 19:47:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26806 states, 26805 states have (on average 1.357022943480694) internal successors, (36375), 26805 states have internal predecessors, (36375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26806 states to 26806 states and 36375 transitions. [2023-11-21 19:47:05,303 INFO L78 Accepts]: Start accepts. Automaton has 26806 states and 36375 transitions. Word has length 129 [2023-11-21 19:47:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:05,304 INFO L495 AbstractCegarLoop]: Abstraction has 26806 states and 36375 transitions. [2023-11-21 19:47:05,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 26806 states and 36375 transitions. [2023-11-21 19:47:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:05,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:05,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:05,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 19:47:05,528 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:05,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash 758237386, now seen corresponding path program 1 times [2023-11-21 19:47:05,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:05,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28756789] [2023-11-21 19:47:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:05,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:05,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:05,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28756789] [2023-11-21 19:47:05,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28756789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:05,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:05,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:47:05,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178547955] [2023-11-21 19:47:05,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:05,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:05,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:05,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:05,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:05,859 INFO L87 Difference]: Start difference. First operand 26806 states and 36375 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:06,329 INFO L93 Difference]: Finished difference Result 53434 states and 72526 transitions. [2023-11-21 19:47:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:47:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:06,403 INFO L225 Difference]: With dead ends: 53434 [2023-11-21 19:47:06,403 INFO L226 Difference]: Without dead ends: 26806 [2023-11-21 19:47:06,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:47:06,440 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 565 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:06,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 150 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:47:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26806 states. [2023-11-21 19:47:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26806 to 26806. [2023-11-21 19:47:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26806 states, 26805 states have (on average 1.3438910650997948) internal successors, (36023), 26805 states have internal predecessors, (36023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26806 states to 26806 states and 36023 transitions. [2023-11-21 19:47:07,164 INFO L78 Accepts]: Start accepts. Automaton has 26806 states and 36023 transitions. Word has length 129 [2023-11-21 19:47:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:07,165 INFO L495 AbstractCegarLoop]: Abstraction has 26806 states and 36023 transitions. [2023-11-21 19:47:07,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 26806 states and 36023 transitions. [2023-11-21 19:47:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:07,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:07,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:07,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 19:47:07,212 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:07,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash -420539606, now seen corresponding path program 1 times [2023-11-21 19:47:07,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:07,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158350012] [2023-11-21 19:47:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:07,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:07,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158350012] [2023-11-21 19:47:07,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158350012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:07,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:07,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:47:07,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994411176] [2023-11-21 19:47:07,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:07,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:07,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:07,604 INFO L87 Difference]: Start difference. First operand 26806 states and 36023 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:08,079 INFO L93 Difference]: Finished difference Result 41116 states and 55383 transitions. [2023-11-21 19:47:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:47:08,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:08,129 INFO L225 Difference]: With dead ends: 41116 [2023-11-21 19:47:08,130 INFO L226 Difference]: Without dead ends: 20680 [2023-11-21 19:47:08,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:47:08,149 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 610 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:08,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 222 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:47:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2023-11-21 19:47:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 20678. [2023-11-21 19:47:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20678 states, 20677 states have (on average 1.3450694007834791) internal successors, (27812), 20677 states have internal predecessors, (27812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20678 states to 20678 states and 27812 transitions. [2023-11-21 19:47:08,705 INFO L78 Accepts]: Start accepts. Automaton has 20678 states and 27812 transitions. Word has length 129 [2023-11-21 19:47:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:08,705 INFO L495 AbstractCegarLoop]: Abstraction has 20678 states and 27812 transitions. [2023-11-21 19:47:08,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20678 states and 27812 transitions. [2023-11-21 19:47:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:08,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:08,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:08,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 19:47:08,736 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:08,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash -98517216, now seen corresponding path program 1 times [2023-11-21 19:47:08,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:08,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003638923] [2023-11-21 19:47:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:08,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:08,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:08,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003638923] [2023-11-21 19:47:08,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003638923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:08,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:08,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:47:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788037301] [2023-11-21 19:47:08,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:08,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:08,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:08,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:08,933 INFO L87 Difference]: Start difference. First operand 20678 states and 27812 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:09,374 INFO L93 Difference]: Finished difference Result 33072 states and 44619 transitions. [2023-11-21 19:47:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:47:09,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:09,410 INFO L225 Difference]: With dead ends: 33072 [2023-11-21 19:47:09,410 INFO L226 Difference]: Without dead ends: 13532 [2023-11-21 19:47:09,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:47:09,425 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 576 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:09,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 134 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:47:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2023-11-21 19:47:09,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 13532. [2023-11-21 19:47:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13532 states, 13531 states have (on average 1.3391471435961866) internal successors, (18120), 13531 states have internal predecessors, (18120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13532 states to 13532 states and 18120 transitions. [2023-11-21 19:47:09,742 INFO L78 Accepts]: Start accepts. Automaton has 13532 states and 18120 transitions. Word has length 129 [2023-11-21 19:47:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:09,743 INFO L495 AbstractCegarLoop]: Abstraction has 13532 states and 18120 transitions. [2023-11-21 19:47:09,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 13532 states and 18120 transitions. [2023-11-21 19:47:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:09,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:09,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:09,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 19:47:09,771 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:09,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:09,772 INFO L85 PathProgramCache]: Analyzing trace with hash 939837078, now seen corresponding path program 1 times [2023-11-21 19:47:09,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:09,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739692493] [2023-11-21 19:47:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:09,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:10,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:10,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739692493] [2023-11-21 19:47:10,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739692493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:10,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:10,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:47:10,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580789928] [2023-11-21 19:47:10,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:10,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:10,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:10,102 INFO L87 Difference]: Start difference. First operand 13532 states and 18120 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:10,377 INFO L93 Difference]: Finished difference Result 26964 states and 36125 transitions. [2023-11-21 19:47:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:47:10,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:10,411 INFO L225 Difference]: With dead ends: 26964 [2023-11-21 19:47:10,411 INFO L226 Difference]: Without dead ends: 13532 [2023-11-21 19:47:10,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:47:10,421 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 528 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:10,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 158 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:10,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2023-11-21 19:47:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 13532. [2023-11-21 19:47:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13532 states, 13531 states have (on average 1.3243662700465597) internal successors, (17920), 13531 states have internal predecessors, (17920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13532 states to 13532 states and 17920 transitions. [2023-11-21 19:47:10,658 INFO L78 Accepts]: Start accepts. Automaton has 13532 states and 17920 transitions. Word has length 129 [2023-11-21 19:47:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:10,659 INFO L495 AbstractCegarLoop]: Abstraction has 13532 states and 17920 transitions. [2023-11-21 19:47:10,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 13532 states and 17920 transitions. [2023-11-21 19:47:10,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:10,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:10,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:10,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 19:47:10,686 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:10,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash 268734966, now seen corresponding path program 1 times [2023-11-21 19:47:10,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:10,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931690432] [2023-11-21 19:47:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:10,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:10,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:10,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931690432] [2023-11-21 19:47:10,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931690432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:10,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:10,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:47:10,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952652149] [2023-11-21 19:47:10,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:10,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:10,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:10,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:10,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:10,923 INFO L87 Difference]: Start difference. First operand 13532 states and 17920 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:11,196 INFO L93 Difference]: Finished difference Result 26988 states and 35755 transitions. [2023-11-21 19:47:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:47:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:11,225 INFO L225 Difference]: With dead ends: 26988 [2023-11-21 19:47:11,225 INFO L226 Difference]: Without dead ends: 13532 [2023-11-21 19:47:11,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:47:11,234 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 545 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:11,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 142 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2023-11-21 19:47:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 13532. [2023-11-21 19:47:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13532 states, 13531 states have (on average 1.311802527529377) internal successors, (17750), 13531 states have internal predecessors, (17750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13532 states to 13532 states and 17750 transitions. [2023-11-21 19:47:11,487 INFO L78 Accepts]: Start accepts. Automaton has 13532 states and 17750 transitions. Word has length 129 [2023-11-21 19:47:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:11,487 INFO L495 AbstractCegarLoop]: Abstraction has 13532 states and 17750 transitions. [2023-11-21 19:47:11,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 13532 states and 17750 transitions. [2023-11-21 19:47:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:11,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:11,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:11,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 19:47:11,512 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:11,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:11,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1661679808, now seen corresponding path program 1 times [2023-11-21 19:47:11,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:11,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459948145] [2023-11-21 19:47:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:11,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:11,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:11,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459948145] [2023-11-21 19:47:11,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459948145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:11,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:11,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:11,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088013879] [2023-11-21 19:47:11,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:11,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:11,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:11,762 INFO L87 Difference]: Start difference. First operand 13532 states and 17750 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:11,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:11,891 INFO L93 Difference]: Finished difference Result 21760 states and 28660 transitions. [2023-11-21 19:47:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:11,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:11,909 INFO L225 Difference]: With dead ends: 21760 [2023-11-21 19:47:11,909 INFO L226 Difference]: Without dead ends: 9359 [2023-11-21 19:47:11,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:11,917 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 65 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:11,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 339 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:47:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9359 states. [2023-11-21 19:47:12,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9359 to 6133. [2023-11-21 19:47:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6133 states, 6132 states have (on average 1.3139269406392695) internal successors, (8057), 6132 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 8057 transitions. [2023-11-21 19:47:12,051 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 8057 transitions. Word has length 129 [2023-11-21 19:47:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:12,052 INFO L495 AbstractCegarLoop]: Abstraction has 6133 states and 8057 transitions. [2023-11-21 19:47:12,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:12,052 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 8057 transitions. [2023-11-21 19:47:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:12,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:12,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:12,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-21 19:47:12,059 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:12,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash 862152426, now seen corresponding path program 1 times [2023-11-21 19:47:12,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:12,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135642033] [2023-11-21 19:47:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:12,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:12,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:12,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135642033] [2023-11-21 19:47:12,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135642033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:12,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:12,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:12,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612384302] [2023-11-21 19:47:12,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:12,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:12,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:12,242 INFO L87 Difference]: Start difference. First operand 6133 states and 8057 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:12,320 INFO L93 Difference]: Finished difference Result 8817 states and 11569 transitions. [2023-11-21 19:47:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:12,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:12,328 INFO L225 Difference]: With dead ends: 8817 [2023-11-21 19:47:12,328 INFO L226 Difference]: Without dead ends: 3308 [2023-11-21 19:47:12,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:12,333 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 55 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:12,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 333 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:47:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2023-11-21 19:47:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 3306. [2023-11-21 19:47:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 1.291981845688351) internal successors, (4270), 3305 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 4270 transitions. [2023-11-21 19:47:12,400 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 4270 transitions. Word has length 129 [2023-11-21 19:47:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:12,400 INFO L495 AbstractCegarLoop]: Abstraction has 3306 states and 4270 transitions. [2023-11-21 19:47:12,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 4270 transitions. [2023-11-21 19:47:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:12,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:12,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:12,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-21 19:47:12,408 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:12,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1115246778, now seen corresponding path program 1 times [2023-11-21 19:47:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:12,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803875570] [2023-11-21 19:47:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:12,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:12,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:12,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803875570] [2023-11-21 19:47:12,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803875570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:12,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:12,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:12,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052439022] [2023-11-21 19:47:12,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:12,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:12,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:12,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:12,652 INFO L87 Difference]: Start difference. First operand 3306 states and 4270 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:12,720 INFO L93 Difference]: Finished difference Result 4742 states and 6118 transitions. [2023-11-21 19:47:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:12,725 INFO L225 Difference]: With dead ends: 4742 [2023-11-21 19:47:12,725 INFO L226 Difference]: Without dead ends: 1808 [2023-11-21 19:47:12,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:12,729 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 47 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:12,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 328 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:47:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2023-11-21 19:47:12,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1806. [2023-11-21 19:47:12,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 1.2686980609418284) internal successors, (2290), 1805 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2290 transitions. [2023-11-21 19:47:12,771 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2290 transitions. Word has length 129 [2023-11-21 19:47:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:12,772 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2290 transitions. [2023-11-21 19:47:12,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2290 transitions. [2023-11-21 19:47:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:12,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:12,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:12,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-21 19:47:12,777 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:12,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:12,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1324047479, now seen corresponding path program 1 times [2023-11-21 19:47:12,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:12,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492658853] [2023-11-21 19:47:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:12,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:13,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:13,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492658853] [2023-11-21 19:47:13,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492658853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:13,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:13,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:13,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785389868] [2023-11-21 19:47:13,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:13,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:13,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:13,030 INFO L87 Difference]: Start difference. First operand 1806 states and 2290 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:13,085 INFO L93 Difference]: Finished difference Result 2570 states and 3258 transitions. [2023-11-21 19:47:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:13,089 INFO L225 Difference]: With dead ends: 2570 [2023-11-21 19:47:13,089 INFO L226 Difference]: Without dead ends: 1012 [2023-11-21 19:47:13,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:13,093 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 39 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:13,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 323 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:47:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-11-21 19:47:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1010. [2023-11-21 19:47:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 1.2428146679881071) internal successors, (1254), 1009 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1254 transitions. [2023-11-21 19:47:13,115 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1254 transitions. Word has length 129 [2023-11-21 19:47:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:13,116 INFO L495 AbstractCegarLoop]: Abstraction has 1010 states and 1254 transitions. [2023-11-21 19:47:13,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1254 transitions. [2023-11-21 19:47:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:13,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:13,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:13,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-21 19:47:13,120 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:13,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:13,122 INFO L85 PathProgramCache]: Analyzing trace with hash 413772172, now seen corresponding path program 1 times [2023-11-21 19:47:13,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:13,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715634137] [2023-11-21 19:47:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:13,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:13,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:13,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715634137] [2023-11-21 19:47:13,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715634137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:13,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:13,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:13,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299474566] [2023-11-21 19:47:13,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:13,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:13,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:13,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:13,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:13,339 INFO L87 Difference]: Start difference. First operand 1010 states and 1254 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:13,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:13,382 INFO L93 Difference]: Finished difference Result 1402 states and 1744 transitions. [2023-11-21 19:47:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:13,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:13,385 INFO L225 Difference]: With dead ends: 1402 [2023-11-21 19:47:13,385 INFO L226 Difference]: Without dead ends: 584 [2023-11-21 19:47:13,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:13,387 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 35 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:13,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 325 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:47:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-21 19:47:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2023-11-21 19:47:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.2117039586919105) internal successors, (704), 581 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:13,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 704 transitions. [2023-11-21 19:47:13,400 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 704 transitions. Word has length 129 [2023-11-21 19:47:13,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:13,401 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 704 transitions. [2023-11-21 19:47:13,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 704 transitions. [2023-11-21 19:47:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:13,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:13,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:13,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-21 19:47:13,404 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:13,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:13,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2110452683, now seen corresponding path program 1 times [2023-11-21 19:47:13,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:13,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003361253] [2023-11-21 19:47:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:13,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:14,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:14,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003361253] [2023-11-21 19:47:14,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003361253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:14,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:14,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:14,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768895782] [2023-11-21 19:47:14,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:14,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:14,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:14,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:14,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:14,207 INFO L87 Difference]: Start difference. First operand 582 states and 704 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:14,306 INFO L93 Difference]: Finished difference Result 972 states and 1189 transitions. [2023-11-21 19:47:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:14,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:14,310 INFO L225 Difference]: With dead ends: 972 [2023-11-21 19:47:14,311 INFO L226 Difference]: Without dead ends: 582 [2023-11-21 19:47:14,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:14,312 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 83 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:14,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 148 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-11-21 19:47:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2023-11-21 19:47:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.197934595524957) internal successors, (696), 581 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 696 transitions. [2023-11-21 19:47:14,325 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 696 transitions. Word has length 129 [2023-11-21 19:47:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:14,326 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 696 transitions. [2023-11-21 19:47:14,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 696 transitions. [2023-11-21 19:47:14,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 19:47:14,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:14,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:14,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-21 19:47:14,329 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:14,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash -463183738, now seen corresponding path program 1 times [2023-11-21 19:47:14,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:14,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633682171] [2023-11-21 19:47:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:14,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:14,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:14,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633682171] [2023-11-21 19:47:14,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633682171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:14,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:14,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:47:14,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57042707] [2023-11-21 19:47:14,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:14,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:47:14,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:47:14,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:47:14,978 INFO L87 Difference]: Start difference. First operand 582 states and 696 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:15,045 INFO L93 Difference]: Finished difference Result 980 states and 1181 transitions. [2023-11-21 19:47:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:47:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-21 19:47:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:15,048 INFO L225 Difference]: With dead ends: 980 [2023-11-21 19:47:15,048 INFO L226 Difference]: Without dead ends: 582 [2023-11-21 19:47:15,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:15,050 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 1 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:15,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 493 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:47:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-11-21 19:47:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2023-11-21 19:47:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.1841652323580034) internal successors, (688), 581 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 688 transitions. [2023-11-21 19:47:15,065 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 688 transitions. Word has length 129 [2023-11-21 19:47:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:15,065 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 688 transitions. [2023-11-21 19:47:15,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 688 transitions. [2023-11-21 19:47:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-21 19:47:15,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:15,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:15,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-21 19:47:15,070 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:15,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2045150256, now seen corresponding path program 1 times [2023-11-21 19:47:15,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:15,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778346116] [2023-11-21 19:47:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:15,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:15,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778346116] [2023-11-21 19:47:15,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778346116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:15,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:15,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666165777] [2023-11-21 19:47:15,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:15,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:15,205 INFO L87 Difference]: Start difference. First operand 582 states and 688 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:15,255 INFO L93 Difference]: Finished difference Result 976 states and 1169 transitions. [2023-11-21 19:47:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2023-11-21 19:47:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:15,257 INFO L225 Difference]: With dead ends: 976 [2023-11-21 19:47:15,258 INFO L226 Difference]: Without dead ends: 566 [2023-11-21 19:47:15,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:15,259 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:15,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 321 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:47:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-21 19:47:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2023-11-21 19:47:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.1646017699115043) internal successors, (658), 565 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 658 transitions. [2023-11-21 19:47:15,273 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 658 transitions. Word has length 131 [2023-11-21 19:47:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:15,274 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 658 transitions. [2023-11-21 19:47:15,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 658 transitions. [2023-11-21 19:47:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-21 19:47:15,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:15,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:15,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-21 19:47:15,278 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:15,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2105465947, now seen corresponding path program 1 times [2023-11-21 19:47:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:15,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417985239] [2023-11-21 19:47:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:15,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:15,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:15,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417985239] [2023-11-21 19:47:15,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417985239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:15,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:15,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950655052] [2023-11-21 19:47:15,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:15,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:15,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:15,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:15,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:15,516 INFO L87 Difference]: Start difference. First operand 566 states and 658 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:15,561 INFO L93 Difference]: Finished difference Result 776 states and 906 transitions. [2023-11-21 19:47:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:15,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2023-11-21 19:47:15,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:15,563 INFO L225 Difference]: With dead ends: 776 [2023-11-21 19:47:15,563 INFO L226 Difference]: Without dead ends: 364 [2023-11-21 19:47:15,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:15,564 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 29 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:15,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 292 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:47:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-21 19:47:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 362. [2023-11-21 19:47:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.1357340720221607) internal successors, (410), 361 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 410 transitions. [2023-11-21 19:47:15,574 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 410 transitions. Word has length 132 [2023-11-21 19:47:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:15,578 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 410 transitions. [2023-11-21 19:47:15,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 410 transitions. [2023-11-21 19:47:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-21 19:47:15,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:15,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:15,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-21 19:47:15,581 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:15,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:15,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1179359606, now seen corresponding path program 1 times [2023-11-21 19:47:15,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:15,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873118582] [2023-11-21 19:47:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:15,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:16,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:16,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873118582] [2023-11-21 19:47:16,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873118582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:16,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:16,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:47:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145051589] [2023-11-21 19:47:16,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:16,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:47:16,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:47:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:47:16,087 INFO L87 Difference]: Start difference. First operand 362 states and 410 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:16,202 INFO L93 Difference]: Finished difference Result 489 states and 554 transitions. [2023-11-21 19:47:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:47:16,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2023-11-21 19:47:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:16,204 INFO L225 Difference]: With dead ends: 489 [2023-11-21 19:47:16,204 INFO L226 Difference]: Without dead ends: 487 [2023-11-21 19:47:16,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-21 19:47:16,206 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 248 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:16,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 748 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-11-21 19:47:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 366. [2023-11-21 19:47:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.1287671232876713) internal successors, (412), 365 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 412 transitions. [2023-11-21 19:47:16,214 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 412 transitions. Word has length 135 [2023-11-21 19:47:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:16,215 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 412 transitions. [2023-11-21 19:47:16,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 412 transitions. [2023-11-21 19:47:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-21 19:47:16,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:16,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:16,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-21 19:47:16,218 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:16,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1688037032, now seen corresponding path program 1 times [2023-11-21 19:47:16,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:16,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001216108] [2023-11-21 19:47:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat