./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.07.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.07.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:32:32,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:32:32,402 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:32:32,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:32:32,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:32:32,470 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:32:32,471 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:32:32,471 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:32:32,472 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:32:32,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:32:32,478 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:32:32,479 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:32:32,479 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:32:32,481 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:32:32,481 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:32:32,482 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:32:32,482 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:32:32,483 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:32:32,483 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:32:32,483 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:32:32,484 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:32:32,484 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:32:32,486 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:32:32,486 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:32:32,486 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:32:32,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:32:32,487 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:32:32,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:32:32,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:32:32,488 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:32:32,490 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:32:32,490 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:32:32,490 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:32:32,490 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:32:32,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:32:32,491 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:32:32,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:32:32,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:32:32,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:32:32,492 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:32:32,492 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:32:32,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:32:32,493 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:32:32,493 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:32:32,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:32:32,494 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_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f [2023-11-06 20:32:32,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:32:32,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:32:32,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:32:32,905 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:32:32,905 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:32:32,908 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/systemc/transmitter.07.cil.c [2023-11-06 20:32:36,071 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:32:36,389 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:32:36,390 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/sv-benchmarks/c/systemc/transmitter.07.cil.c [2023-11-06 20:32:36,405 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/data/f71ce2cf4/54703df050a54e2f9e5002d23ebc79d9/FLAG087d3c553 [2023-11-06 20:32:36,419 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/data/f71ce2cf4/54703df050a54e2f9e5002d23ebc79d9 [2023-11-06 20:32:36,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:32:36,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:32:36,425 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:32:36,425 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:32:36,431 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:32:36,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:36,433 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@816b647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36, skipping insertion in model container [2023-11-06 20:32:36,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:36,486 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:32:36,665 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_d12035ad-b361-407d-8b49-bd48cdf9dba9/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2023-11-06 20:32:36,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:32:36,802 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:32:36,819 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_d12035ad-b361-407d-8b49-bd48cdf9dba9/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2023-11-06 20:32:36,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:32:36,895 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:32:36,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36 WrapperNode [2023-11-06 20:32:36,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:32:36,901 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:32:36,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:32:36,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:32:36,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:36,920 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:36,975 INFO L138 Inliner]: procedures = 42, calls = 51, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 564 [2023-11-06 20:32:36,975 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:32:36,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:32:36,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:32:36,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:32:36,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:36,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:36,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:36,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:37,008 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:37,018 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:37,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:37,025 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:37,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:32:37,031 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:32:37,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:32:37,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:32:37,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (1/1) ... [2023-11-06 20:32:37,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:32:37,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:37,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:32:37,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12035ad-b361-407d-8b49-bd48cdf9dba9/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:32:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:32:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-06 20:32:37,123 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-06 20:32:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-06 20:32:37,124 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-06 20:32:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-06 20:32:37,126 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-06 20:32:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-06 20:32:37,127 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-06 20:32:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-06 20:32:37,127 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-06 20:32:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:32:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-06 20:32:37,128 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-06 20:32:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:32:37,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:32:37,259 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:32:37,262 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:32:37,971 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:32:38,327 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:32:38,327 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-06 20:32:38,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:32:38 BoogieIcfgContainer [2023-11-06 20:32:38,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:32:38,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:32:38,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:32:38,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:32:38,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:32:36" (1/3) ... [2023-11-06 20:32:38,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b70fecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:32:38, skipping insertion in model container [2023-11-06 20:32:38,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:36" (2/3) ... [2023-11-06 20:32:38,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b70fecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:32:38, skipping insertion in model container [2023-11-06 20:32:38,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:32:38" (3/3) ... [2023-11-06 20:32:38,344 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.07.cil.c [2023-11-06 20:32:38,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:32:38,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 20:32:38,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:32:38,422 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=LoopsAndPotentialCycles, 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;@1902e91f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:32:38,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 20:32:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 139 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 113 states have internal predecessors, (167), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-06 20:32:38,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 20:32:38,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:38,447 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] [2023-11-06 20:32:38,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:38,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1448030330, now seen corresponding path program 1 times [2023-11-06 20:32:38,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:38,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156171184] [2023-11-06 20:32:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:38,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:38,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156171184] [2023-11-06 20:32:38,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156171184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:38,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:38,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:32:38,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125026234] [2023-11-06 20:32:38,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:38,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:32:38,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:32:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:32:39,022 INFO L87 Difference]: Start difference. First operand has 139 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 113 states have internal predecessors, (167), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:39,373 INFO L93 Difference]: Finished difference Result 400 states and 613 transitions. [2023-11-06 20:32:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:32:39,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-06 20:32:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:39,400 INFO L225 Difference]: With dead ends: 400 [2023-11-06 20:32:39,400 INFO L226 Difference]: Without dead ends: 262 [2023-11-06 20:32:39,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:32:39,410 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 350 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:39,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 550 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:32:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-06 20:32:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 259. [2023-11-06 20:32:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 211 states have (on average 1.4407582938388626) internal successors, (304), 212 states have internal predecessors, (304), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-06 20:32:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 374 transitions. [2023-11-06 20:32:39,548 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 374 transitions. Word has length 57 [2023-11-06 20:32:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:39,549 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 374 transitions. [2023-11-06 20:32:39,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 374 transitions. [2023-11-06 20:32:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 20:32:39,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:39,553 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] [2023-11-06 20:32:39,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:32:39,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:39,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash 953494791, now seen corresponding path program 1 times [2023-11-06 20:32:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:39,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517316696] [2023-11-06 20:32:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:39,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:39,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:39,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517316696] [2023-11-06 20:32:39,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517316696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:39,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:39,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:32:39,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153177496] [2023-11-06 20:32:39,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:39,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:32:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:32:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:32:39,767 INFO L87 Difference]: Start difference. First operand 259 states and 374 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:40,503 INFO L93 Difference]: Finished difference Result 881 states and 1283 transitions. [2023-11-06 20:32:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:32:40,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-06 20:32:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:40,511 INFO L225 Difference]: With dead ends: 881 [2023-11-06 20:32:40,511 INFO L226 Difference]: Without dead ends: 606 [2023-11-06 20:32:40,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:32:40,517 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 720 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:40,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 831 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 20:32:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2023-11-06 20:32:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 594. [2023-11-06 20:32:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 497 states have (on average 1.432595573440644) internal successors, (712), 492 states have internal predecessors, (712), 68 states have call successors, (68), 26 states have call predecessors, (68), 28 states have return successors, (76), 76 states have call predecessors, (76), 68 states have call successors, (76) [2023-11-06 20:32:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 856 transitions. [2023-11-06 20:32:40,626 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 856 transitions. Word has length 57 [2023-11-06 20:32:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:40,627 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 856 transitions. [2023-11-06 20:32:40,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 856 transitions. [2023-11-06 20:32:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 20:32:40,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:40,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:32:40,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:40,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:40,633 INFO L85 PathProgramCache]: Analyzing trace with hash 468320072, now seen corresponding path program 1 times [2023-11-06 20:32:40,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:40,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866240486] [2023-11-06 20:32:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:40,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:40,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:40,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866240486] [2023-11-06 20:32:40,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866240486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:40,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:40,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:32:40,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214991815] [2023-11-06 20:32:40,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:40,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:32:40,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:32:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:32:40,791 INFO L87 Difference]: Start difference. First operand 594 states and 856 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:41,420 INFO L93 Difference]: Finished difference Result 2069 states and 3014 transitions. [2023-11-06 20:32:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:32:41,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-06 20:32:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:41,457 INFO L225 Difference]: With dead ends: 2069 [2023-11-06 20:32:41,458 INFO L226 Difference]: Without dead ends: 1441 [2023-11-06 20:32:41,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:32:41,462 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 720 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:41,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 798 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 20:32:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2023-11-06 20:32:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1117. [2023-11-06 20:32:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 936 states have (on average 1.4337606837606838) internal successors, (1342), 932 states have internal predecessors, (1342), 124 states have call successors, (124), 50 states have call predecessors, (124), 56 states have return successors, (147), 135 states have call predecessors, (147), 124 states have call successors, (147) [2023-11-06 20:32:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1613 transitions. [2023-11-06 20:32:41,588 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1613 transitions. Word has length 57 [2023-11-06 20:32:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:41,588 INFO L495 AbstractCegarLoop]: Abstraction has 1117 states and 1613 transitions. [2023-11-06 20:32:41,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1613 transitions. [2023-11-06 20:32:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 20:32:41,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:41,591 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] [2023-11-06 20:32:41,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:32:41,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:41,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash 991640743, now seen corresponding path program 1 times [2023-11-06 20:32:41,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:41,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404823859] [2023-11-06 20:32:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:41,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:41,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:41,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404823859] [2023-11-06 20:32:41,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404823859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:41,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:41,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:32:41,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020644089] [2023-11-06 20:32:41,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:41,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:32:41,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:41,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:32:41,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:32:41,693 INFO L87 Difference]: Start difference. First operand 1117 states and 1613 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:42,169 INFO L93 Difference]: Finished difference Result 3312 states and 4852 transitions. [2023-11-06 20:32:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:32:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-06 20:32:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:42,190 INFO L225 Difference]: With dead ends: 3312 [2023-11-06 20:32:42,191 INFO L226 Difference]: Without dead ends: 2200 [2023-11-06 20:32:42,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:32:42,197 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 365 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:42,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 548 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:32:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2023-11-06 20:32:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 2188. [2023-11-06 20:32:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 1839 states have (on average 1.420337139749864) internal successors, (2612), 1831 states have internal predecessors, (2612), 236 states have call successors, (236), 100 states have call predecessors, (236), 112 states have return successors, (279), 257 states have call predecessors, (279), 236 states have call successors, (279) [2023-11-06 20:32:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 3127 transitions. [2023-11-06 20:32:42,422 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 3127 transitions. Word has length 57 [2023-11-06 20:32:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:42,423 INFO L495 AbstractCegarLoop]: Abstraction has 2188 states and 3127 transitions. [2023-11-06 20:32:42,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 3127 transitions. [2023-11-06 20:32:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 20:32:42,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:42,427 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] [2023-11-06 20:32:42,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:32:42,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:42,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1910615366, now seen corresponding path program 1 times [2023-11-06 20:32:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:42,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751796319] [2023-11-06 20:32:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:42,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:42,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751796319] [2023-11-06 20:32:42,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751796319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:42,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:42,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:32:42,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634134799] [2023-11-06 20:32:42,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:42,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:32:42,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:42,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:32:42,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:32:42,542 INFO L87 Difference]: Start difference. First operand 2188 states and 3127 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:43,196 INFO L93 Difference]: Finished difference Result 6529 states and 9490 transitions. [2023-11-06 20:32:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:32:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-06 20:32:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:43,231 INFO L225 Difference]: With dead ends: 6529 [2023-11-06 20:32:43,231 INFO L226 Difference]: Without dead ends: 4346 [2023-11-06 20:32:43,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:32:43,243 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 373 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:43,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 550 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:32:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2023-11-06 20:32:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4328. [2023-11-06 20:32:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 3635 states have (on average 1.4033012379642367) internal successors, (5101), 3618 states have internal predecessors, (5101), 468 states have call successors, (468), 200 states have call predecessors, (468), 224 states have return successors, (554), 510 states have call predecessors, (554), 468 states have call successors, (554) [2023-11-06 20:32:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 6123 transitions. [2023-11-06 20:32:43,648 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 6123 transitions. Word has length 57 [2023-11-06 20:32:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:43,648 INFO L495 AbstractCegarLoop]: Abstraction has 4328 states and 6123 transitions. [2023-11-06 20:32:43,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:32:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 6123 transitions. [2023-11-06 20:32:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 20:32:43,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:43,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 20:32:43,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:32:43,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:43,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:43,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1506364891, now seen corresponding path program 1 times [2023-11-06 20:32:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:43,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012800545] [2023-11-06 20:32:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:43,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 20:32:43,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:43,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012800545] [2023-11-06 20:32:43,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012800545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:43,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:43,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:32:43,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316742135] [2023-11-06 20:32:43,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:43,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:32:43,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:32:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:32:43,964 INFO L87 Difference]: Start difference. First operand 4328 states and 6123 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:32:45,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:45,016 INFO L93 Difference]: Finished difference Result 12344 states and 17515 transitions. [2023-11-06 20:32:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:32:45,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2023-11-06 20:32:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:45,083 INFO L225 Difference]: With dead ends: 12344 [2023-11-06 20:32:45,084 INFO L226 Difference]: Without dead ends: 8022 [2023-11-06 20:32:45,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 20:32:45,159 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 560 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:45,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 538 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:32:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8022 states. [2023-11-06 20:32:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8022 to 7240. [2023-11-06 20:32:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7240 states, 6139 states have (on average 1.3935494380192213) internal successors, (8555), 6104 states have internal predecessors, (8555), 716 states have call successors, (716), 336 states have call predecessors, (716), 384 states have return successors, (888), 800 states have call predecessors, (888), 716 states have call successors, (888) [2023-11-06 20:32:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 10159 transitions. [2023-11-06 20:32:45,864 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 10159 transitions. Word has length 75 [2023-11-06 20:32:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:45,866 INFO L495 AbstractCegarLoop]: Abstraction has 7240 states and 10159 transitions. [2023-11-06 20:32:45,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:32:45,866 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 10159 transitions. [2023-11-06 20:32:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 20:32:45,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:45,872 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 20:32:45,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:32:45,872 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:45,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:45,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1647017673, now seen corresponding path program 1 times [2023-11-06 20:32:45,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:45,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945072360] [2023-11-06 20:32:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:45,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 20:32:46,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:46,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945072360] [2023-11-06 20:32:46,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945072360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:46,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:46,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:32:46,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082774301] [2023-11-06 20:32:46,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:46,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:32:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:46,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:32:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:32:46,289 INFO L87 Difference]: Start difference. First operand 7240 states and 10159 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:32:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:48,072 INFO L93 Difference]: Finished difference Result 23676 states and 33325 transitions. [2023-11-06 20:32:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:32:48,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 79 [2023-11-06 20:32:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:48,210 INFO L225 Difference]: With dead ends: 23676 [2023-11-06 20:32:48,210 INFO L226 Difference]: Without dead ends: 16442 [2023-11-06 20:32:48,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 20:32:48,242 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 555 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:48,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 455 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:32:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16442 states. [2023-11-06 20:32:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16442 to 14144. [2023-11-06 20:32:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14144 states, 11995 states have (on average 1.3848270112546894) internal successors, (16611), 11932 states have internal predecessors, (16611), 1380 states have call successors, (1380), 672 states have call predecessors, (1380), 768 states have return successors, (1700), 1540 states have call predecessors, (1700), 1380 states have call successors, (1700) [2023-11-06 20:32:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14144 states to 14144 states and 19691 transitions. [2023-11-06 20:32:49,865 INFO L78 Accepts]: Start accepts. Automaton has 14144 states and 19691 transitions. Word has length 79 [2023-11-06 20:32:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:49,866 INFO L495 AbstractCegarLoop]: Abstraction has 14144 states and 19691 transitions. [2023-11-06 20:32:49,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:32:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 14144 states and 19691 transitions. [2023-11-06 20:32:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-06 20:32:49,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:49,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 20:32:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:32:49,881 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:49,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash -454861731, now seen corresponding path program 1 times [2023-11-06 20:32:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:49,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991721201] [2023-11-06 20:32:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 20:32:50,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:50,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991721201] [2023-11-06 20:32:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991721201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:50,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:50,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:32:50,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536018950] [2023-11-06 20:32:50,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:50,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:32:50,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:32:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:32:50,285 INFO L87 Difference]: Start difference. First operand 14144 states and 19691 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:32:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:52,564 INFO L93 Difference]: Finished difference Result 37228 states and 51917 transitions. [2023-11-06 20:32:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:32:52,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2023-11-06 20:32:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:52,671 INFO L225 Difference]: With dead ends: 37228 [2023-11-06 20:32:52,671 INFO L226 Difference]: Without dead ends: 23090 [2023-11-06 20:32:52,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 20:32:52,721 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 515 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:52,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 473 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:32:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23090 states. [2023-11-06 20:32:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23090 to 21216. [2023-11-06 20:32:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21216 states, 17987 states have (on average 1.3767165174848501) internal successors, (24763), 17860 states have internal predecessors, (24763), 2076 states have call successors, (2076), 1024 states have call predecessors, (2076), 1152 states have return successors, (2492), 2332 states have call predecessors, (2492), 2076 states have call successors, (2492) [2023-11-06 20:32:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21216 states to 21216 states and 29331 transitions. [2023-11-06 20:32:55,032 INFO L78 Accepts]: Start accepts. Automaton has 21216 states and 29331 transitions. Word has length 83 [2023-11-06 20:32:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:55,033 INFO L495 AbstractCegarLoop]: Abstraction has 21216 states and 29331 transitions. [2023-11-06 20:32:55,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:32:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 21216 states and 29331 transitions. [2023-11-06 20:32:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-06 20:32:55,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:55,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 20:32:55,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:32:55,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:55,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash -766971589, now seen corresponding path program 1 times [2023-11-06 20:32:55,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:55,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950540729] [2023-11-06 20:32:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:55,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 20:32:55,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:55,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950540729] [2023-11-06 20:32:55,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950540729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:55,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:55,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:32:55,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408941088] [2023-11-06 20:32:55,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:32:55,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:32:55,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:32:55,412 INFO L87 Difference]: Start difference. First operand 21216 states and 29331 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:32:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:59,141 INFO L93 Difference]: Finished difference Result 55292 states and 76597 transitions. [2023-11-06 20:32:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:32:59,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 87 [2023-11-06 20:32:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:59,386 INFO L225 Difference]: With dead ends: 55292 [2023-11-06 20:32:59,387 INFO L226 Difference]: Without dead ends: 34082 [2023-11-06 20:32:59,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 20:32:59,444 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 511 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:59,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 544 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:32:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34082 states.