./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac8e60fb32c268c01bf0cc1d1cd76454411c67e3ab15d16b4eca5e74b982e97f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:05:48,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:05:48,839 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:05:48,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:05:48,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:05:48,879 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:05:48,880 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:05:48,880 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:05:48,881 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:05:48,882 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:05:48,882 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:05:48,883 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:05:48,883 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:05:48,884 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:05:48,896 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:05:48,896 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:05:48,897 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:05:48,897 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:05:48,898 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:05:48,898 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:05:48,899 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:05:48,900 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:05:48,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:05:48,901 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:05:48,901 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:05:48,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:05:48,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:05:48,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:05:48,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:05:48,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:05:48,904 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:05:48,904 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:05:48,904 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:05:48,905 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:05:48,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:05:48,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:05:48,905 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:05:48,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:05:48,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:05:48,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:05:48,906 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:05:48,907 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:05:48,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:05:48,907 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:05:48,907 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:05:48,907 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:05:48,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:05:48,908 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_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac8e60fb32c268c01bf0cc1d1cd76454411c67e3ab15d16b4eca5e74b982e97f [2023-12-02 18:05:49,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:05:49,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:05:49,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:05:49,146 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:05:49,147 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:05:49,148 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2023-12-02 18:05:51,874 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:05:52,088 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:05:52,089 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2023-12-02 18:05:52,098 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/data/045d124e0/6179874cc52c480d84ba9b3fc7bb34f7/FLAG519c35434 [2023-12-02 18:05:52,115 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/data/045d124e0/6179874cc52c480d84ba9b3fc7bb34f7 [2023-12-02 18:05:52,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:05:52,119 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:05:52,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:05:52,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:05:52,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:05:52,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@965cb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52, skipping insertion in model container [2023-12-02 18:05:52,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,172 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:05:52,375 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_560268a5-1021-4c6d-8b03-ea9d1ef6a253/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c[14522,14535] [2023-12-02 18:05:52,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:05:52,388 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:05:52,454 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_560268a5-1021-4c6d-8b03-ea9d1ef6a253/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c[14522,14535] [2023-12-02 18:05:52,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:05:52,473 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:05:52,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52 WrapperNode [2023-12-02 18:05:52,474 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:05:52,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:05:52,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:05:52,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:05:52,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,531 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 492 [2023-12-02 18:05:52,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:05:52,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:05:52,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:05:52,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:05:52,539 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,544 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,544 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,555 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,566 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,572 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:05:52,573 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:05:52,574 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:05:52,574 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:05:52,575 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (1/1) ... [2023-12-02 18:05:52,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:05:52,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:05:52,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:05:52,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:05:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-12-02 18:05:52,634 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-12-02 18:05:52,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:05:52,635 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-12-02 18:05:52,635 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-12-02 18:05:52,635 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-12-02 18:05:52,635 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-12-02 18:05:52,635 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-12-02 18:05:52,636 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-12-02 18:05:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:05:52,636 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:05:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:05:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-12-02 18:05:52,637 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-12-02 18:05:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:05:52,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:05:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-12-02 18:05:52,637 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-12-02 18:05:52,737 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:05:52,739 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:05:53,211 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:05:53,359 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:05:53,359 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:05:53,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:05:53 BoogieIcfgContainer [2023-12-02 18:05:53,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:05:53,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:05:53,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:05:53,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:05:53,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:05:52" (1/3) ... [2023-12-02 18:05:53,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57003cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:05:53, skipping insertion in model container [2023-12-02 18:05:53,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:05:52" (2/3) ... [2023-12-02 18:05:53,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57003cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:05:53, skipping insertion in model container [2023-12-02 18:05:53,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:05:53" (3/3) ... [2023-12-02 18:05:53,368 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2023-12-02 18:05:53,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:05:53,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:05:53,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:05:53,433 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;@7cf7f6a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:05:53,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:05:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 103 states have (on average 1.5339805825242718) internal successors, (158), 105 states have internal predecessors, (158), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-02 18:05:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 18:05:53,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:53,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:53,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:53,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:53,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2005387838, now seen corresponding path program 1 times [2023-12-02 18:05:53,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:53,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524650081] [2023-12-02 18:05:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:53,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:05:53,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:53,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524650081] [2023-12-02 18:05:53,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524650081] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:53,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:05:53,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:05:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331019730] [2023-12-02 18:05:53,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:53,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:05:53,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:05:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:05:53,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:05:53,881 INFO L87 Difference]: Start difference. First operand has 143 states, 103 states have (on average 1.5339805825242718) internal successors, (158), 105 states have internal predecessors, (158), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:05:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:54,018 INFO L93 Difference]: Finished difference Result 286 states and 467 transitions. [2023-12-02 18:05:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:05:54,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-02 18:05:54,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:54,029 INFO L225 Difference]: With dead ends: 286 [2023-12-02 18:05:54,030 INFO L226 Difference]: Without dead ends: 146 [2023-12-02 18:05:54,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:05:54,039 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 5 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:54,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 608 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:05:54,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-02 18:05:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-12-02 18:05:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 106 states have (on average 1.5) internal successors, (159), 107 states have internal predecessors, (159), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-02 18:05:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 221 transitions. [2023-12-02 18:05:54,091 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 221 transitions. Word has length 19 [2023-12-02 18:05:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:54,092 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 221 transitions. [2023-12-02 18:05:54,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:05:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 221 transitions. [2023-12-02 18:05:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 18:05:54,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:54,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:54,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:05:54,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:54,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1026734497, now seen corresponding path program 1 times [2023-12-02 18:05:54,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:54,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183565667] [2023-12-02 18:05:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:54,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:05:54,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:54,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183565667] [2023-12-02 18:05:54,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183565667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:54,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:05:54,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:05:54,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014191409] [2023-12-02 18:05:54,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:54,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:05:54,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:05:54,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:05:54,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:05:54,306 INFO L87 Difference]: Start difference. First operand 146 states and 221 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:05:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:54,375 INFO L93 Difference]: Finished difference Result 294 states and 445 transitions. [2023-12-02 18:05:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:05:54,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-12-02 18:05:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:54,378 INFO L225 Difference]: With dead ends: 294 [2023-12-02 18:05:54,378 INFO L226 Difference]: Without dead ends: 151 [2023-12-02 18:05:54,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:05:54,381 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 6 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:54,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 620 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:05:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-12-02 18:05:54,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-12-02 18:05:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 110 states have (on average 1.481818181818182) internal successors, (163), 111 states have internal predecessors, (163), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-02 18:05:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 225 transitions. [2023-12-02 18:05:54,401 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 225 transitions. Word has length 28 [2023-12-02 18:05:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:54,402 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 225 transitions. [2023-12-02 18:05:54,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:05:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 225 transitions. [2023-12-02 18:05:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 18:05:54,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:54,404 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:54,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:05:54,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:54,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1385687638, now seen corresponding path program 1 times [2023-12-02 18:05:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:54,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236846861] [2023-12-02 18:05:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:54,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:05:54,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:54,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236846861] [2023-12-02 18:05:54,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236846861] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:54,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:05:54,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:05:54,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209435335] [2023-12-02 18:05:54,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:54,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:05:54,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:05:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:05:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:05:54,557 INFO L87 Difference]: Start difference. First operand 151 states and 225 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:05:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:54,630 INFO L93 Difference]: Finished difference Result 304 states and 456 transitions. [2023-12-02 18:05:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:05:54,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2023-12-02 18:05:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:54,633 INFO L225 Difference]: With dead ends: 304 [2023-12-02 18:05:54,633 INFO L226 Difference]: Without dead ends: 156 [2023-12-02 18:05:54,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:05:54,635 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 6 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:54,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 606 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:05:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-02 18:05:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-12-02 18:05:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 114 states have (on average 1.4649122807017543) internal successors, (167), 115 states have internal predecessors, (167), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-02 18:05:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 229 transitions. [2023-12-02 18:05:54,653 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 229 transitions. Word has length 36 [2023-12-02 18:05:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:54,654 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 229 transitions. [2023-12-02 18:05:54,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:05:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 229 transitions. [2023-12-02 18:05:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 18:05:54,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:54,656 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:54,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:05:54,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:54,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:54,657 INFO L85 PathProgramCache]: Analyzing trace with hash -254111626, now seen corresponding path program 1 times [2023-12-02 18:05:54,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:54,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007624187] [2023-12-02 18:05:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:54,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:05:54,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:54,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007624187] [2023-12-02 18:05:54,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007624187] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:54,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:05:54,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:05:54,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439984464] [2023-12-02 18:05:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:54,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:05:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:05:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:05:54,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:05:54,853 INFO L87 Difference]: Start difference. First operand 156 states and 229 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:05:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:54,925 INFO L93 Difference]: Finished difference Result 314 states and 464 transitions. [2023-12-02 18:05:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:05:54,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-12-02 18:05:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:54,928 INFO L225 Difference]: With dead ends: 314 [2023-12-02 18:05:54,928 INFO L226 Difference]: Without dead ends: 161 [2023-12-02 18:05:54,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:05:54,931 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 6 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:54,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 606 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:05:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-02 18:05:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-12-02 18:05:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 118 states have (on average 1.4491525423728813) internal successors, (171), 119 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-02 18:05:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2023-12-02 18:05:54,947 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 44 [2023-12-02 18:05:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:54,947 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2023-12-02 18:05:54,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:05:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2023-12-02 18:05:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 18:05:54,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:54,950 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:05:54,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:05:54,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:54,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1644396367, now seen corresponding path program 1 times [2023-12-02 18:05:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:54,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784408567] [2023-12-02 18:05:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:05:55,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:55,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784408567] [2023-12-02 18:05:55,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784408567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:55,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:05:55,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:05:55,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539859984] [2023-12-02 18:05:55,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:55,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:05:55,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:05:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:05:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:05:55,072 INFO L87 Difference]: Start difference. First operand 161 states and 233 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:05:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:55,135 INFO L93 Difference]: Finished difference Result 323 states and 468 transitions. [2023-12-02 18:05:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:05:55,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-12-02 18:05:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:55,138 INFO L225 Difference]: With dead ends: 323 [2023-12-02 18:05:55,138 INFO L226 Difference]: Without dead ends: 165 [2023-12-02 18:05:55,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:05:55,140 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 5 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:55,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 615 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:05:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-02 18:05:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-12-02 18:05:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 121 states have (on average 1.43801652892562) internal successors, (174), 122 states have internal predecessors, (174), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-02 18:05:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 236 transitions. [2023-12-02 18:05:55,162 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 236 transitions. Word has length 44 [2023-12-02 18:05:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:55,162 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 236 transitions. [2023-12-02 18:05:55,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:05:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 236 transitions. [2023-12-02 18:05:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 18:05:55,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:55,165 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:05:55,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:05:55,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:55,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash 466350294, now seen corresponding path program 1 times [2023-12-02 18:05:55,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:55,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244617429] [2023-12-02 18:05:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:55,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:05:55,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244617429] [2023-12-02 18:05:55,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244617429] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:55,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:05:55,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:05:55,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781333599] [2023-12-02 18:05:55,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:05:55,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:05:55,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:05:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:05:55,348 INFO L87 Difference]: Start difference. First operand 165 states and 236 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 18:05:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:55,408 INFO L93 Difference]: Finished difference Result 333 states and 477 transitions. [2023-12-02 18:05:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:05:55,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2023-12-02 18:05:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:55,411 INFO L225 Difference]: With dead ends: 333 [2023-12-02 18:05:55,411 INFO L226 Difference]: Without dead ends: 171 [2023-12-02 18:05:55,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:05:55,413 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 7 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:55,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 617 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:05:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-12-02 18:05:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-12-02 18:05:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 126 states have (on average 1.4206349206349207) internal successors, (179), 127 states have internal predecessors, (179), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-02 18:05:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 241 transitions. [2023-12-02 18:05:55,425 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 241 transitions. Word has length 52 [2023-12-02 18:05:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:55,426 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 241 transitions. [2023-12-02 18:05:55,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 18:05:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 241 transitions. [2023-12-02 18:05:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 18:05:55,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:55,428 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:55,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:05:55,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:55,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:55,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2121365217, now seen corresponding path program 1 times [2023-12-02 18:05:55,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:55,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731146764] [2023-12-02 18:05:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:55,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:05:55,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:55,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731146764] [2023-12-02 18:05:55,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731146764] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:05:55,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673295895] [2023-12-02 18:05:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:55,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:05:55,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:05:55,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:05:55,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:05:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:56,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:05:56,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:05:56,222 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:05:56,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673295895] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:56,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:05:56,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2023-12-02 18:05:56,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744072881] [2023-12-02 18:05:56,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:56,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:05:56,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:05:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:05:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:05:56,224 INFO L87 Difference]: Start difference. First operand 171 states and 241 transitions. Second operand has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 18:05:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:56,494 INFO L93 Difference]: Finished difference Result 507 states and 707 transitions. [2023-12-02 18:05:56,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:05:56,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 55 [2023-12-02 18:05:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:56,498 INFO L225 Difference]: With dead ends: 507 [2023-12-02 18:05:56,498 INFO L226 Difference]: Without dead ends: 329 [2023-12-02 18:05:56,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:05:56,500 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 197 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:56,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 977 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:05:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-12-02 18:05:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2023-12-02 18:05:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 239 states have (on average 1.4100418410041842) internal successors, (337), 241 states have internal predecessors, (337), 60 states have call successors, (60), 26 states have call predecessors, (60), 26 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2023-12-02 18:05:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 457 transitions. [2023-12-02 18:05:56,522 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 457 transitions. Word has length 55 [2023-12-02 18:05:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:56,522 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 457 transitions. [2023-12-02 18:05:56,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 18:05:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 457 transitions. [2023-12-02 18:05:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 18:05:56,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:56,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:56,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:05:56,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:05:56,725 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:56,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash -98111868, now seen corresponding path program 1 times [2023-12-02 18:05:56,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:56,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610052601] [2023-12-02 18:05:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:05:57,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610052601] [2023-12-02 18:05:57,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610052601] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:05:57,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744863666] [2023-12-02 18:05:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:57,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:05:57,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:05:57,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:05:57,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:05:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:57,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:05:57,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:05:57,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:05:58,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744863666] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:05:58,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121936765] [2023-12-02 18:05:58,097 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2023-12-02 18:05:58,097 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:05:58,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:05:58,105 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:05:58,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:06:04,001 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 132 for LOIs [2023-12-02 18:06:04,185 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2023-12-02 18:06:04,198 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-12-02 18:06:04,272 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:06:10,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2121936765] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:06:10,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:06:10,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2023-12-02 18:06:10,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216227549] [2023-12-02 18:06:10,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:06:10,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 18:06:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:06:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 18:06:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 18:06:10,171 INFO L87 Difference]: Start difference. First operand 326 states and 457 transitions. Second operand has 25 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:06:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:06:13,926 INFO L93 Difference]: Finished difference Result 802 states and 1113 transitions. [2023-12-02 18:06:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 18:06:13,927 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2023-12-02 18:06:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:06:13,932 INFO L225 Difference]: With dead ends: 802 [2023-12-02 18:06:13,932 INFO L226 Difference]: Without dead ends: 479 [2023-12-02 18:06:13,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 18:06:13,934 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 172 mSDsluCounter, 3017 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:06:13,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 3289 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 18:06:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-12-02 18:06:13,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 332. [2023-12-02 18:06:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 243 states have (on average 1.3703703703703705) internal successors, (333), 245 states have internal predecessors, (333), 60 states have call successors, (60), 28 states have call predecessors, (60), 28 states have return successors, (60), 58 states have call predecessors, (60), 60 states have call successors, (60) [2023-12-02 18:06:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 453 transitions. [2023-12-02 18:06:13,999 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 453 transitions. Word has length 57 [2023-12-02 18:06:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:06:13,999 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 453 transitions. [2023-12-02 18:06:13,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:06:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 453 transitions. [2023-12-02 18:06:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 18:06:14,000 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:06:14,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:06:14,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:06:14,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:06:14,201 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:06:14,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:06:14,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1408769380, now seen corresponding path program 1 times [2023-12-02 18:06:14,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:06:14,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580831819] [2023-12-02 18:06:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:14,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:06:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:06:14,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:06:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580831819] [2023-12-02 18:06:14,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580831819] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:06:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341461794] [2023-12-02 18:06:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:14,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:06:14,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:06:14,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:06:14,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:06:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:14,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:06:14,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:06:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:06:15,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:06:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:06:15,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341461794] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:06:15,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [765232541] [2023-12-02 18:06:15,161 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2023-12-02 18:06:15,161 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:06:15,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:06:15,161 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:06:15,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:06:20,307 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 136 for LOIs [2023-12-02 18:06:20,527 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 111 for LOIs [2023-12-02 18:06:20,540 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-12-02 18:06:20,606 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:06:26,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [765232541] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:06:26,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:06:26,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2023-12-02 18:06:26,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805768332] [2023-12-02 18:06:26,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:06:26,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 18:06:26,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:06:26,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 18:06:26,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 18:06:26,496 INFO L87 Difference]: Start difference. First operand 332 states and 453 transitions. Second operand has 25 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:06:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:06:30,017 INFO L93 Difference]: Finished difference Result 662 states and 911 transitions. [2023-12-02 18:06:30,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 18:06:30,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2023-12-02 18:06:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:06:30,020 INFO L225 Difference]: With dead ends: 662 [2023-12-02 18:06:30,020 INFO L226 Difference]: Without dead ends: 483 [2023-12-02 18:06:30,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 18:06:30,022 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 176 mSDsluCounter, 3515 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 3840 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:06:30,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 3840 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 18:06:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-12-02 18:06:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 480. [2023-12-02 18:06:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 350 states have (on average 1.3457142857142856) internal successors, (471), 353 states have internal predecessors, (471), 88 states have call successors, (88), 41 states have call predecessors, (88), 41 states have return successors, (88), 85 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-02 18:06:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 647 transitions. [2023-12-02 18:06:30,110 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 647 transitions. Word has length 57 [2023-12-02 18:06:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:06:30,111 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 647 transitions. [2023-12-02 18:06:30,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:06:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 647 transitions. [2023-12-02 18:06:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 18:06:30,113 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:06:30,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:06:30,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:06:30,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:06:30,314 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:06:30,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:06:30,314 INFO L85 PathProgramCache]: Analyzing trace with hash -662927991, now seen corresponding path program 1 times [2023-12-02 18:06:30,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:06:30,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778281419] [2023-12-02 18:06:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:30,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:06:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:06:30,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:06:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778281419] [2023-12-02 18:06:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778281419] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:06:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844456271] [2023-12-02 18:06:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:30,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:06:30,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:06:30,651 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:06:30,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:06:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:30,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:06:30,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:06:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:06:31,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:06:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:06:31,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844456271] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:06:31,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688537944] [2023-12-02 18:06:31,231 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 18:06:31,231 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:06:31,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:06:31,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:06:31,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:06:36,039 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 131 for LOIs [2023-12-02 18:06:36,254 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 105 for LOIs [2023-12-02 18:06:36,267 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2023-12-02 18:06:36,328 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:06:42,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1688537944] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:06:42,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:06:42,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2023-12-02 18:06:42,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857539109] [2023-12-02 18:06:42,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:06:42,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 18:06:42,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:06:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 18:06:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 18:06:42,965 INFO L87 Difference]: Start difference. First operand 480 states and 647 transitions. Second operand has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:06:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:06:47,235 INFO L93 Difference]: Finished difference Result 808 states and 1102 transitions. [2023-12-02 18:06:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 18:06:47,236 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2023-12-02 18:06:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:06:47,239 INFO L225 Difference]: With dead ends: 808 [2023-12-02 18:06:47,239 INFO L226 Difference]: Without dead ends: 629 [2023-12-02 18:06:47,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 18:06:47,241 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 114 mSDsluCounter, 4222 mSDsCounter, 0 mSdLazyCounter, 2511 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 4551 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:06:47,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 4551 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2511 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-02 18:06:47,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-12-02 18:06:47,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 626. [2023-12-02 18:06:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 455 states have (on average 1.3318681318681318) internal successors, (606), 459 states have internal predecessors, (606), 116 states have call successors, (116), 54 states have call predecessors, (116), 54 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-12-02 18:06:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 838 transitions. [2023-12-02 18:06:47,368 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 838 transitions. Word has length 59 [2023-12-02 18:06:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:06:47,368 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 838 transitions. [2023-12-02 18:06:47,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:06:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 838 transitions. [2023-12-02 18:06:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 18:06:47,370 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:06:47,370 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:06:47,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:06:47,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 18:06:47,570 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:06:47,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:06:47,571 INFO L85 PathProgramCache]: Analyzing trace with hash -958410266, now seen corresponding path program 1 times [2023-12-02 18:06:47,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:06:47,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307749938] [2023-12-02 18:06:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:47,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:06:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:06:47,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:06:47,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307749938] [2023-12-02 18:06:47,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307749938] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:06:47,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:06:47,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:06:47,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285374691] [2023-12-02 18:06:47,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:06:47,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:06:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:06:47,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:06:47,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:06:47,655 INFO L87 Difference]: Start difference. First operand 626 states and 838 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 18:06:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:06:47,810 INFO L93 Difference]: Finished difference Result 1167 states and 1576 transitions. [2023-12-02 18:06:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:06:47,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 61 [2023-12-02 18:06:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:06:47,815 INFO L225 Difference]: With dead ends: 1167 [2023-12-02 18:06:47,815 INFO L226 Difference]: Without dead ends: 642 [2023-12-02 18:06:47,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:06:47,817 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 5 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:06:47,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 615 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:06:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-12-02 18:06:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2023-12-02 18:06:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 467 states have (on average 1.323340471092077) internal successors, (618), 471 states have internal predecessors, (618), 116 states have call successors, (116), 58 states have call predecessors, (116), 58 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-12-02 18:06:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 850 transitions. [2023-12-02 18:06:47,927 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 850 transitions. Word has length 61 [2023-12-02 18:06:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:06:47,927 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 850 transitions. [2023-12-02 18:06:47,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 18:06:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 850 transitions. [2023-12-02 18:06:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 18:06:47,929 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:06:47,929 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] [2023-12-02 18:06:47,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 18:06:47,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:06:47,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:06:47,929 INFO L85 PathProgramCache]: Analyzing trace with hash -821907020, now seen corresponding path program 1 times [2023-12-02 18:06:47,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:06:47,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258306171] [2023-12-02 18:06:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:47,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:06:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:06:48,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:06:48,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258306171] [2023-12-02 18:06:48,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258306171] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:06:48,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871405961] [2023-12-02 18:06:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:48,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:06:48,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:06:48,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:06:48,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:06:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:48,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:06:48,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:06:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:06:48,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:06:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:06:48,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871405961] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:06:48,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [34397452] [2023-12-02 18:06:48,654 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2023-12-02 18:06:48,654 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:06:48,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:06:48,654 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:06:48,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:06:54,348 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 94 for LOIs [2023-12-02 18:06:54,393 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2023-12-02 18:06:54,406 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 89 for LOIs [2023-12-02 18:06:54,458 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 106 for LOIs [2023-12-02 18:06:54,521 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 112 for LOIs [2023-12-02 18:06:54,661 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-12-02 18:06:54,726 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:07:06,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13544#(and (= ~s2s2_old~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (= (+ 2 ~active_side_History_2~0) 0) (<= 1 |#StackHeapBarrier|) (= ~s1p~0 0) (or (and (not (= (mod ~side1Failed_History_1~0 256) 0)) (= (mod ~side2Failed_History_1~0 256) 0) (= (mod ~side1Failed~0 256) 0)) (and (not (= (mod ~side1Failed_History_1~0 256) 0)) (= (mod ~side2Failed_History_1~0 256) 0) (= (mod ~side2Failed~0 256) 0))) (= ~cs1~0 0) (= (+ ~s1s2_old~0 1) 0) (= ~s2s1~0 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (+ ~s1p_old~0 1) 0) (= (+ ~s2p_new~0 1) 0) (= ~s1s1~0 0) (= (+ ~s2s1_new~0 1) 0) (= (+ ~s1p_new~0 1) 0) (= ~s2p_old~0 0) (= (+ ~s1s2_new~0 1) 0) (= ~s2s1_old~0 0) (= (+ ~cs1_new~0 1) 0) (= ~s2s2~0 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (= (+ ~s2s2_new~0 1) 0) (= (+ ~s1s1_new~0 1) 0) (= (+ ~side1_written~0 1) 0) (= (+ 2 ~active_side_History_1~0) 0) (= ~active_side_History_0~0 0) (= assert_~arg 0) (= ~cs2~0 0) (= (+ ~cs2_new~0 1) 0) (= ~s2p~0 0) (= (+ ~s1s1_old~0 1) 0))' at error location [2023-12-02 18:07:06,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:07:06,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:07:06,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2023-12-02 18:07:06,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343036556] [2023-12-02 18:07:06,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:07:06,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 18:07:06,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:07:06,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 18:07:06,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2776, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 18:07:06,192 INFO L87 Difference]: Start difference. First operand 642 states and 850 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 18:07:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:06,760 INFO L93 Difference]: Finished difference Result 1235 states and 1657 transitions. [2023-12-02 18:07:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 18:07:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 65 [2023-12-02 18:07:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:06,765 INFO L225 Difference]: With dead ends: 1235 [2023-12-02 18:07:06,765 INFO L226 Difference]: Without dead ends: 710 [2023-12-02 18:07:06,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 141 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=328, Invalid=3332, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 18:07:06,769 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 257 mSDsluCounter, 3004 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 3298 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:06,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 3298 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:07:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-12-02 18:07:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 642. [2023-12-02 18:07:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 467 states have (on average 1.316916488222698) internal successors, (615), 471 states have internal predecessors, (615), 116 states have call successors, (116), 58 states have call predecessors, (116), 58 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-12-02 18:07:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 847 transitions. [2023-12-02 18:07:06,932 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 847 transitions. Word has length 65 [2023-12-02 18:07:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:06,933 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 847 transitions. [2023-12-02 18:07:06,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 18:07:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 847 transitions. [2023-12-02 18:07:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 18:07:06,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:06,935 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:07:06,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 18:07:07,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 18:07:07,135 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:07:07,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:07,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1382667799, now seen corresponding path program 1 times [2023-12-02 18:07:07,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:07:07,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332014447] [2023-12-02 18:07:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:07,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:07:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:07:07,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:07:07,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332014447] [2023-12-02 18:07:07,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332014447] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:07,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:07:07,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:07:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967387531] [2023-12-02 18:07:07,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:07,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:07:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:07:07,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:07:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:07:07,378 INFO L87 Difference]: Start difference. First operand 642 states and 847 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 18:07:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:08,082 INFO L93 Difference]: Finished difference Result 1284 states and 1766 transitions. [2023-12-02 18:07:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:07:08,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2023-12-02 18:07:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:08,090 INFO L225 Difference]: With dead ends: 1284 [2023-12-02 18:07:08,090 INFO L226 Difference]: Without dead ends: 979 [2023-12-02 18:07:08,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:07:08,092 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 467 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:08,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1402 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:07:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2023-12-02 18:07:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 770. [2023-12-02 18:07:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 558 states have (on average 1.3136200716845878) internal successors, (733), 562 states have internal predecessors, (733), 140 states have call successors, (140), 71 states have call predecessors, (140), 71 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2023-12-02 18:07:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1013 transitions. [2023-12-02 18:07:08,225 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1013 transitions. Word has length 66 [2023-12-02 18:07:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:08,225 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1013 transitions. [2023-12-02 18:07:08,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 18:07:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1013 transitions. [2023-12-02 18:07:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 18:07:08,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:08,226 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:07:08,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 18:07:08,226 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:07:08,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2004961086, now seen corresponding path program 1 times [2023-12-02 18:07:08,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:07:08,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705448444] [2023-12-02 18:07:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:08,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:07:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:07:08,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:07:08,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705448444] [2023-12-02 18:07:08,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705448444] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:08,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:07:08,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:07:08,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24116857] [2023-12-02 18:07:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:08,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:07:08,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:07:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:07:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:07:08,395 INFO L87 Difference]: Start difference. First operand 770 states and 1013 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 18:07:09,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:09,063 INFO L93 Difference]: Finished difference Result 1460 states and 1999 transitions. [2023-12-02 18:07:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:07:09,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2023-12-02 18:07:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:09,070 INFO L225 Difference]: With dead ends: 1460 [2023-12-02 18:07:09,070 INFO L226 Difference]: Without dead ends: 1131 [2023-12-02 18:07:09,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:07:09,072 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 608 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:09,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1774 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:07:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2023-12-02 18:07:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 917. [2023-12-02 18:07:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 662 states have (on average 1.3217522658610272) internal successors, (875), 667 states have internal predecessors, (875), 169 states have call successors, (169), 85 states have call predecessors, (169), 85 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2023-12-02 18:07:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1213 transitions. [2023-12-02 18:07:09,303 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1213 transitions. Word has length 68 [2023-12-02 18:07:09,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:09,304 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1213 transitions. [2023-12-02 18:07:09,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 18:07:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1213 transitions. [2023-12-02 18:07:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 18:07:09,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:09,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:09,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 18:07:09,306 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:07:09,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:09,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2085225438, now seen corresponding path program 1 times [2023-12-02 18:07:09,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:07:09,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298277648] [2023-12-02 18:07:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:09,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:07:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:07:09,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:07:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298277648] [2023-12-02 18:07:09,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298277648] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:07:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456078780] [2023-12-02 18:07:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:09,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:09,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:09,616 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:09,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:07:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:09,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:07:09,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:07:09,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:07:09,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456078780] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:09,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1518007424] [2023-12-02 18:07:09,973 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2023-12-02 18:07:09,973 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:07:09,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:07:09,974 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:07:09,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:07:15,239 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 134 for LOIs [2023-12-02 18:07:15,428 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2023-12-02 18:07:15,441 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2023-12-02 18:07:15,585 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-12-02 18:07:15,649 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:07:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1518007424] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:24,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:07:24,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [8, 9, 9] total 48 [2023-12-02 18:07:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349021377] [2023-12-02 18:07:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:24,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 18:07:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:07:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 18:07:24,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 18:07:24,382 INFO L87 Difference]: Start difference. First operand 917 states and 1213 transitions. Second operand has 37 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 25 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 18:07:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:28,768 INFO L93 Difference]: Finished difference Result 1487 states and 1982 transitions. [2023-12-02 18:07:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 18:07:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 25 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 72 [2023-12-02 18:07:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:28,772 INFO L225 Difference]: With dead ends: 1487 [2023-12-02 18:07:28,773 INFO L226 Difference]: Without dead ends: 906 [2023-12-02 18:07:28,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 172 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=246, Invalid=2304, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 18:07:28,776 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 153 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:28,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 2552 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-02 18:07:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-12-02 18:07:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 903. [2023-12-02 18:07:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 652 states have (on average 1.3205521472392638) internal successors, (861), 657 states have internal predecessors, (861), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2023-12-02 18:07:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1193 transitions. [2023-12-02 18:07:28,985 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1193 transitions. Word has length 72 [2023-12-02 18:07:28,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:28,985 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1193 transitions. [2023-12-02 18:07:28,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 25 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 18:07:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1193 transitions. [2023-12-02 18:07:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 18:07:28,987 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:28,987 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:28,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:07:29,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:29,191 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:07:29,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1143392002, now seen corresponding path program 1 times [2023-12-02 18:07:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:07:29,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025446307] [2023-12-02 18:07:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:07:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:07:29,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:07:29,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025446307] [2023-12-02 18:07:29,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025446307] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:07:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907842720] [2023-12-02 18:07:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:29,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:29,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:29,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:29,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:07:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:29,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:07:29,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:07:29,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:07:29,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907842720] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:29,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:07:29,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 18:07:29,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707065564] [2023-12-02 18:07:29,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:29,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:07:29,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:07:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:07:29,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:07:29,659 INFO L87 Difference]: Start difference. First operand 903 states and 1193 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 18:07:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:30,188 INFO L93 Difference]: Finished difference Result 1710 states and 2306 transitions. [2023-12-02 18:07:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:07:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 72 [2023-12-02 18:07:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:30,194 INFO L225 Difference]: With dead ends: 1710 [2023-12-02 18:07:30,194 INFO L226 Difference]: Without dead ends: 1012 [2023-12-02 18:07:30,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:07:30,197 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 450 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:30,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 1314 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:07:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-12-02 18:07:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 903. [2023-12-02 18:07:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 652 states have (on average 1.3144171779141105) internal successors, (857), 657 states have internal predecessors, (857), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2023-12-02 18:07:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1189 transitions. [2023-12-02 18:07:30,358 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1189 transitions. Word has length 72 [2023-12-02 18:07:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:30,358 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1189 transitions. [2023-12-02 18:07:30,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 18:07:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1189 transitions. [2023-12-02 18:07:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 18:07:30,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:30,360 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2023-12-02 18:07:30,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 18:07:30,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 18:07:30,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:07:30,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:30,561 INFO L85 PathProgramCache]: Analyzing trace with hash -891835408, now seen corresponding path program 1 times [2023-12-02 18:07:30,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:07:30,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873412303] [2023-12-02 18:07:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:30,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:07:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 18:07:30,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:07:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873412303] [2023-12-02 18:07:30,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873412303] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:30,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:07:30,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:07:30,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395717843] [2023-12-02 18:07:30,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:30,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:07:30,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:07:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:07:30,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:07:30,795 INFO L87 Difference]: Start difference. First operand 903 states and 1189 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 18:07:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:31,296 INFO L93 Difference]: Finished difference Result 1190 states and 1639 transitions. [2023-12-02 18:07:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:07:31,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2023-12-02 18:07:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:31,302 INFO L225 Difference]: With dead ends: 1190 [2023-12-02 18:07:31,302 INFO L226 Difference]: Without dead ends: 1188 [2023-12-02 18:07:31,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:07:31,303 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 452 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:31,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1498 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:07:31,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2023-12-02 18:07:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 911. [2023-12-02 18:07:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 656 states have (on average 1.3125) internal successors, (861), 663 states have internal predecessors, (861), 168 states have call successors, (168), 86 states have call predecessors, (168), 86 states have return successors, (168), 161 states have call predecessors, (168), 168 states have call successors, (168) [2023-12-02 18:07:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1197 transitions. [2023-12-02 18:07:31,460 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1197 transitions. Word has length 75 [2023-12-02 18:07:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:31,461 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1197 transitions. [2023-12-02 18:07:31,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 18:07:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1197 transitions. [2023-12-02 18:07:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 18:07:31,462 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:31,462 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2023-12-02 18:07:31,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 18:07:31,463 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:07:31,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:31,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1885537133, now seen corresponding path program 1 times [2023-12-02 18:07:31,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:07:31,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923449815] [2023-12-02 18:07:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:31,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:07:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 18:07:31,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:07:31,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923449815] [2023-12-02 18:07:31,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923449815] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:31,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:07:31,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:07:31,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589528234] [2023-12-02 18:07:31,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:31,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:07:31,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:07:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:07:31,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:07:31,574 INFO L87 Difference]: Start difference. First operand 911 states and 1197 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 18:07:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:31,760 INFO L93 Difference]: Finished difference Result 1575 states and 2081 transitions. [2023-12-02 18:07:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:07:31,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 78 [2023-12-02 18:07:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:31,766 INFO L225 Difference]: With dead ends: 1575 [2023-12-02 18:07:31,766 INFO L226 Difference]: Without dead ends: 899 [2023-12-02 18:07:31,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:07:31,768 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 7 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:31,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 607 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:07:31,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-12-02 18:07:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2023-12-02 18:07:31,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 650 states have (on average 1.2876923076923077) internal successors, (837), 657 states have internal predecessors, (837), 162 states have call successors, (162), 86 states have call predecessors, (162), 86 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2023-12-02 18:07:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1161 transitions. [2023-12-02 18:07:31,975 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1161 transitions. Word has length 78 [2023-12-02 18:07:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:31,975 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1161 transitions. [2023-12-02 18:07:31,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 18:07:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1161 transitions. [2023-12-02 18:07:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 18:07:31,977 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:31,978 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2023-12-02 18:07:31,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 18:07:31,978 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:07:31,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:31,978 INFO L85 PathProgramCache]: Analyzing trace with hash 785908516, now seen corresponding path program 1 times [2023-12-02 18:07:31,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:07:31,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706824408] [2023-12-02 18:07:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:31,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:07:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:07:32,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:07:32,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706824408] [2023-12-02 18:07:32,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706824408] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:07:32,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480559273] [2023-12-02 18:07:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:32,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:32,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:32,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:07:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:32,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:07:32,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:07:33,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:33,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480559273] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:33,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032141243] [2023-12-02 18:07:33,175 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2023-12-02 18:07:33,175 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:07:33,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:07:33,176 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:07:33,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:07:39,739 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 94 for LOIs [2023-12-02 18:07:39,785 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2023-12-02 18:07:39,797 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2023-12-02 18:07:39,944 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 110 for LOIs [2023-12-02 18:07:40,013 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 120 for LOIs [2023-12-02 18:07:40,177 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-12-02 18:07:40,243 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:07:55,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35198#(and (= ~s2s2_old~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (= (+ 2 ~active_side_History_2~0) 0) (<= 1 |#StackHeapBarrier|) (or (and (not (= (mod ~side1Failed_History_0~0 256) 0)) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= (mod ~side2Failed~0 256) 0) (= (mod ~side1Failed_History_1~0 256) 0)) (and (not (= (mod ~side1Failed_History_0~0 256) 0)) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= (mod ~side1Failed~0 256) 0) (= (mod ~side1Failed_History_1~0 256) 0))) (= ~s1p~0 0) (= ~cs1~0 0) (= (+ ~s1s2_old~0 1) 0) (= ~s2s1~0 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (+ ~s1p_old~0 1) 0) (= (+ ~s2p_new~0 1) 0) (= ~s1s1~0 0) (= (+ ~s2s1_new~0 1) 0) (= (+ ~s1p_new~0 1) 0) (= ~s2p_old~0 0) (= (+ ~s1s2_new~0 1) 0) (= ~s2s1_old~0 0) (= (+ ~cs1_new~0 1) 0) (= ~s2s2~0 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (= (+ ~s2s2_new~0 1) 0) (= (+ ~s1s1_new~0 1) 0) (= (+ ~side1_written~0 1) 0) (= (+ 2 ~active_side_History_1~0) 0) (= ~active_side_History_0~0 0) (= assert_~arg 0) (= ~cs2~0 0) (= (+ ~cs2_new~0 1) 0) (= ~s2p~0 0) (= (+ ~s1s1_old~0 1) 0))' at error location [2023-12-02 18:07:55,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:07:55,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:07:55,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2023-12-02 18:07:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740489100] [2023-12-02 18:07:55,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:07:55,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 18:07:55,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:07:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 18:07:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=4215, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 18:07:55,091 INFO L87 Difference]: Start difference. First operand 899 states and 1161 transitions. Second operand has 20 states, 15 states have (on average 5.733333333333333) internal successors, (86), 18 states have internal predecessors, (86), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2023-12-02 18:07:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:55,968 INFO L93 Difference]: Finished difference Result 2053 states and 2782 transitions. [2023-12-02 18:07:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 18:07:55,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 5.733333333333333) internal successors, (86), 18 states have internal predecessors, (86), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 80 [2023-12-02 18:07:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:55,975 INFO L225 Difference]: With dead ends: 2053 [2023-12-02 18:07:55,975 INFO L226 Difference]: Without dead ends: 1314 [2023-12-02 18:07:55,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 177 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=532, Invalid=5168, Unknown=0, NotChecked=0, Total=5700 [2023-12-02 18:07:55,978 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 300 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 3416 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:55,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 3416 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:07:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2023-12-02 18:07:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 878. [2023-12-02 18:07:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 635 states have (on average 1.2803149606299213) internal successors, (813), 642 states have internal predecessors, (813), 156 states have call successors, (156), 86 states have call predecessors, (156), 86 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2023-12-02 18:07:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1125 transitions. [2023-12-02 18:07:56,230 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1125 transitions. Word has length 80 [2023-12-02 18:07:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:56,230 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1125 transitions. [2023-12-02 18:07:56,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 5.733333333333333) internal successors, (86), 18 states have internal predecessors, (86), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2023-12-02 18:07:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1125 transitions. [2023-12-02 18:07:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 18:07:56,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:56,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 18:07:56,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:07:56,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:56,438 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:07:56,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:56,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1353253714, now seen corresponding path program 1 times [2023-12-02 18:07:56,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:07:56,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722019080] [2023-12-02 18:07:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:56,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:07:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:07:56,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:07:56,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722019080] [2023-12-02 18:07:56,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722019080] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:07:56,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528596861] [2023-12-02 18:07:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:56,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:56,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:56,657 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:56,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:07:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:56,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:07:56,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:07:56,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:56,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528596861] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948056718] [2023-12-02 18:07:56,995 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2023-12-02 18:07:56,995 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:07:56,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:07:56,995 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:07:56,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:08:02,602 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 134 for LOIs [2023-12-02 18:08:02,788 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 111 for LOIs [2023-12-02 18:08:02,800 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2023-12-02 18:08:02,949 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 111 for LOIs [2023-12-02 18:08:03,067 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-12-02 18:08:03,140 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:08:14,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [948056718] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:08:14,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:08:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [8, 9, 9] total 54 [2023-12-02 18:08:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847053516] [2023-12-02 18:08:14,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:08:14,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-02 18:08:14,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:08:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-02 18:08:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2565, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 18:08:14,314 INFO L87 Difference]: Start difference. First operand 878 states and 1125 transitions. Second operand has 43 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 29 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 18:08:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:19,762 INFO L93 Difference]: Finished difference Result 1493 states and 1940 transitions. [2023-12-02 18:08:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-02 18:08:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 29 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 80 [2023-12-02 18:08:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:19,767 INFO L225 Difference]: With dead ends: 1493 [2023-12-02 18:08:19,767 INFO L226 Difference]: Without dead ends: 921 [2023-12-02 18:08:19,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 190 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=320, Invalid=2872, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 18:08:19,769 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 294 mSDsluCounter, 4018 mSDsCounter, 0 mSdLazyCounter, 2980 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 4301 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:19,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 4301 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2980 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 18:08:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-12-02 18:08:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 881. [2023-12-02 18:08:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 637 states have (on average 1.2794348508634223) internal successors, (815), 644 states have internal predecessors, (815), 157 states have call successors, (157), 86 states have call predecessors, (157), 86 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2023-12-02 18:08:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1129 transitions. [2023-12-02 18:08:19,929 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1129 transitions. Word has length 80 [2023-12-02 18:08:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:19,930 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1129 transitions. [2023-12-02 18:08:19,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 29 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 18:08:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1129 transitions. [2023-12-02 18:08:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 18:08:19,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:19,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 18:08:19,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 18:08:20,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:08:20,132 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:20,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1687632617, now seen corresponding path program 1 times [2023-12-02 18:08:20,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:20,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462942005] [2023-12-02 18:08:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:20,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:08:20,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462942005] [2023-12-02 18:08:20,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462942005] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:08:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028569050] [2023-12-02 18:08:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:20,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:08:20,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:08:20,426 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:08:20,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:08:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:20,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:08:20,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:08:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:08:20,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:08:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:08:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028569050] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:08:20,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899110614] [2023-12-02 18:08:20,758 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2023-12-02 18:08:20,759 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:08:20,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:08:20,759 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:08:20,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:08:26,425 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 129 for LOIs [2023-12-02 18:08:26,613 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 105 for LOIs [2023-12-02 18:08:26,626 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 86 for LOIs [2023-12-02 18:08:26,770 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 107 for LOIs [2023-12-02 18:08:26,885 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2023-12-02 18:08:26,948 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:08:38,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1899110614] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:08:38,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:08:38,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2023-12-02 18:08:38,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947001194] [2023-12-02 18:08:38,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:08:38,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-02 18:08:38,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:08:38,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-02 18:08:38,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2779, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 18:08:38,761 INFO L87 Difference]: Start difference. First operand 881 states and 1129 transitions. Second operand has 45 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 31 states have internal predecessors, (47), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 18:08:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:44,839 INFO L93 Difference]: Finished difference Result 1496 states and 1944 transitions. [2023-12-02 18:08:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-02 18:08:44,839 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 31 states have internal predecessors, (47), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 82 [2023-12-02 18:08:44,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:44,843 INFO L225 Difference]: With dead ends: 1496 [2023-12-02 18:08:44,843 INFO L226 Difference]: Without dead ends: 924 [2023-12-02 18:08:44,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=324, Invalid=3098, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 18:08:44,846 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 150 mSDsluCounter, 4905 mSDsCounter, 0 mSdLazyCounter, 3702 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 5220 SdHoareTripleChecker+Invalid, 3743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:44,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 5220 Invalid, 3743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3702 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-12-02 18:08:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2023-12-02 18:08:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 884. [2023-12-02 18:08:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 639 states have (on average 1.2785602503912363) internal successors, (817), 646 states have internal predecessors, (817), 158 states have call successors, (158), 86 states have call predecessors, (158), 86 states have return successors, (158), 151 states have call predecessors, (158), 158 states have call successors, (158) [2023-12-02 18:08:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1133 transitions. [2023-12-02 18:08:45,008 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1133 transitions. Word has length 82 [2023-12-02 18:08:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:45,008 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1133 transitions. [2023-12-02 18:08:45,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 31 states have internal predecessors, (47), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 18:08:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1133 transitions. [2023-12-02 18:08:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 18:08:45,009 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:45,009 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:08:45,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:08:45,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 18:08:45,210 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:45,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1095195683, now seen corresponding path program 1 times [2023-12-02 18:08:45,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:45,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225027614] [2023-12-02 18:08:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 18:08:45,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:45,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225027614] [2023-12-02 18:08:45,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225027614] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:08:45,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:08:45,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:08:45,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153245502] [2023-12-02 18:08:45,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:08:45,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:08:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:08:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:08:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:08:45,320 INFO L87 Difference]: Start difference. First operand 884 states and 1133 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-12-02 18:08:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:45,533 INFO L93 Difference]: Finished difference Result 1509 states and 1951 transitions. [2023-12-02 18:08:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:08:45,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 87 [2023-12-02 18:08:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:45,538 INFO L225 Difference]: With dead ends: 1509 [2023-12-02 18:08:45,538 INFO L226 Difference]: Without dead ends: 872 [2023-12-02 18:08:45,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:08:45,540 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 7 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:45,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 589 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:08:45,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2023-12-02 18:08:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2023-12-02 18:08:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 633 states have (on average 1.2527646129541865) internal successors, (793), 640 states have internal predecessors, (793), 152 states have call successors, (152), 86 states have call predecessors, (152), 86 states have return successors, (152), 145 states have call predecessors, (152), 152 states have call successors, (152) [2023-12-02 18:08:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1097 transitions. [2023-12-02 18:08:45,713 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1097 transitions. Word has length 87 [2023-12-02 18:08:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:45,713 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1097 transitions. [2023-12-02 18:08:45,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-12-02 18:08:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1097 transitions. [2023-12-02 18:08:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 18:08:45,714 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:45,714 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-12-02 18:08:45,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 18:08:45,714 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:45,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash 184290023, now seen corresponding path program 1 times [2023-12-02 18:08:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:45,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881782990] [2023-12-02 18:08:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:45,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:08:45,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:45,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881782990] [2023-12-02 18:08:45,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881782990] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:08:45,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269886561] [2023-12-02 18:08:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:45,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:08:45,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:08:45,997 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:08:45,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:08:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:46,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:08:46,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:08:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:08:46,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:08:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:08:46,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269886561] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:08:46,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218948488] [2023-12-02 18:08:46,326 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2023-12-02 18:08:46,326 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:08:46,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:08:46,326 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:08:46,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:08:52,429 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 136 for LOIs [2023-12-02 18:08:52,647 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 111 for LOIs [2023-12-02 18:08:52,660 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2023-12-02 18:08:52,809 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 136 for LOIs [2023-12-02 18:08:53,570 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-12-02 18:08:53,635 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:09:07,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [218948488] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:09:07,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:09:07,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2023-12-02 18:09:07,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986256270] [2023-12-02 18:09:07,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:09:07,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-02 18:09:07,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:09:07,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-02 18:09:07,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2948, Unknown=0, NotChecked=0, Total=3306 [2023-12-02 18:09:07,039 INFO L87 Difference]: Start difference. First operand 872 states and 1097 transitions. Second operand has 47 states, 38 states have (on average 1.263157894736842) internal successors, (48), 32 states have internal predecessors, (48), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 18:09:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:09:13,270 INFO L93 Difference]: Finished difference Result 1466 states and 1867 transitions. [2023-12-02 18:09:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-02 18:09:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 38 states have (on average 1.263157894736842) internal successors, (48), 32 states have internal predecessors, (48), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 87 [2023-12-02 18:09:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:09:13,275 INFO L225 Difference]: With dead ends: 1466 [2023-12-02 18:09:13,275 INFO L226 Difference]: Without dead ends: 902 [2023-12-02 18:09:13,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 207 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=381, Invalid=3279, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 18:09:13,277 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 194 mSDsluCounter, 4744 mSDsCounter, 0 mSdLazyCounter, 3745 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 5019 SdHoareTripleChecker+Invalid, 3796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:09:13,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 5019 Invalid, 3796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3745 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-12-02 18:09:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2023-12-02 18:09:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 859. [2023-12-02 18:09:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 624 states have (on average 1.25) internal successors, (780), 631 states have internal predecessors, (780), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2023-12-02 18:09:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1076 transitions. [2023-12-02 18:09:13,433 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1076 transitions. Word has length 87 [2023-12-02 18:09:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:09:13,434 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1076 transitions. [2023-12-02 18:09:13,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 38 states have (on average 1.263157894736842) internal successors, (48), 32 states have internal predecessors, (48), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 18:09:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1076 transitions. [2023-12-02 18:09:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 18:09:13,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:09:13,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-12-02 18:09:13,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 18:09:13,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 18:09:13,636 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:09:13,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:09:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1736401996, now seen corresponding path program 1 times [2023-12-02 18:09:13,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:09:13,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735900610] [2023-12-02 18:09:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:09:13,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:09:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:09:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:09:13,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:09:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735900610] [2023-12-02 18:09:13,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735900610] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:09:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881752730] [2023-12-02 18:09:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:09:13,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:09:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:09:13,929 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:09:13,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 18:09:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:09:14,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:09:14,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:09:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:09:14,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:09:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:09:14,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881752730] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:09:14,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [658562052] [2023-12-02 18:09:14,317 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2023-12-02 18:09:14,317 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:09:14,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:09:14,317 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:09:14,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:09:20,404 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 129 for LOIs [2023-12-02 18:09:20,586 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 105 for LOIs [2023-12-02 18:09:20,599 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 86 for LOIs [2023-12-02 18:09:20,749 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 132 for LOIs [2023-12-02 18:09:21,490 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2023-12-02 18:09:21,551 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:09:36,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [658562052] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:09:36,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:09:36,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [8, 9, 9] total 60 [2023-12-02 18:09:36,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517151104] [2023-12-02 18:09:36,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:09:36,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 18:09:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:09:36,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 18:09:36,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=3178, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 18:09:36,207 INFO L87 Difference]: Start difference. First operand 859 states and 1076 transitions. Second operand has 49 states, 40 states have (on average 1.25) internal successors, (50), 34 states have internal predecessors, (50), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 18:09:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:09:42,270 INFO L93 Difference]: Finished difference Result 1496 states and 1913 transitions. [2023-12-02 18:09:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 18:09:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 40 states have (on average 1.25) internal successors, (50), 34 states have internal predecessors, (50), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 89 [2023-12-02 18:09:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:09:42,275 INFO L225 Difference]: With dead ends: 1496 [2023-12-02 18:09:42,275 INFO L226 Difference]: Without dead ends: 932 [2023-12-02 18:09:42,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 211 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 18:09:42,277 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 434 mSDsluCounter, 4517 mSDsCounter, 0 mSdLazyCounter, 3522 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 4805 SdHoareTripleChecker+Invalid, 3660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:09:42,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 4805 Invalid, 3660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3522 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-12-02 18:09:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2023-12-02 18:09:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 859. [2023-12-02 18:09:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 624 states have (on average 1.25) internal successors, (780), 631 states have internal predecessors, (780), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2023-12-02 18:09:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1076 transitions. [2023-12-02 18:09:42,437 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1076 transitions. Word has length 89 [2023-12-02 18:09:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:09:42,437 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1076 transitions. [2023-12-02 18:09:42,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 40 states have (on average 1.25) internal successors, (50), 34 states have internal predecessors, (50), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 18:09:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1076 transitions. [2023-12-02 18:09:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 18:09:42,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:09:42,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-12-02 18:09:42,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 18:09:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 18:09:42,640 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:09:42,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:09:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 434611353, now seen corresponding path program 1 times [2023-12-02 18:09:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:09:42,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573106141] [2023-12-02 18:09:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:09:42,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:09:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:09:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:09:42,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:09:42,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573106141] [2023-12-02 18:09:42,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573106141] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:09:42,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186681314] [2023-12-02 18:09:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:09:42,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:09:42,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:09:42,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:09:42,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 18:09:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:09:42,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:09:42,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:09:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:09:43,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:09:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:09:43,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186681314] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:09:43,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603496811] [2023-12-02 18:09:43,142 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-12-02 18:09:43,142 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:09:43,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:09:43,143 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:09:43,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:09:49,171 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 127 for LOIs [2023-12-02 18:09:49,325 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 105 for LOIs [2023-12-02 18:09:49,337 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 86 for LOIs [2023-12-02 18:09:49,481 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 132 for LOIs [2023-12-02 18:09:50,226 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2023-12-02 18:09:50,288 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:10:04,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1603496811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:04,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:04,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [8, 9, 9] total 60 [2023-12-02 18:10:04,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898841846] [2023-12-02 18:10:04,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:04,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 18:10:04,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:04,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 18:10:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=3178, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 18:10:04,723 INFO L87 Difference]: Start difference. First operand 859 states and 1076 transitions. Second operand has 49 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 34 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 18:10:11,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:11,400 INFO L93 Difference]: Finished difference Result 1486 states and 1896 transitions. [2023-12-02 18:10:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 18:10:11,401 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 34 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 93 [2023-12-02 18:10:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:11,406 INFO L225 Difference]: With dead ends: 1486 [2023-12-02 18:10:11,406 INFO L226 Difference]: Without dead ends: 922 [2023-12-02 18:10:11,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 18:10:11,409 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 244 mSDsluCounter, 5652 mSDsCounter, 0 mSdLazyCounter, 4209 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 5941 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 4209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:11,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 5941 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 4209 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-12-02 18:10:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2023-12-02 18:10:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 846. [2023-12-02 18:10:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 615 states have (on average 1.2471544715447154) internal successors, (767), 622 states have internal predecessors, (767), 144 states have call successors, (144), 86 states have call predecessors, (144), 86 states have return successors, (144), 137 states have call predecessors, (144), 144 states have call successors, (144) [2023-12-02 18:10:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1055 transitions. [2023-12-02 18:10:11,579 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1055 transitions. Word has length 93 [2023-12-02 18:10:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:11,580 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1055 transitions. [2023-12-02 18:10:11,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 34 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 18:10:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1055 transitions. [2023-12-02 18:10:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 18:10:11,582 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:11,582 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 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] [2023-12-02 18:10:11,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 18:10:11,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 18:10:11,783 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:10:11,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:11,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1889940269, now seen corresponding path program 1 times [2023-12-02 18:10:11,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:11,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724543711] [2023-12-02 18:10:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:11,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 18:10:11,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:11,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724543711] [2023-12-02 18:10:11,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724543711] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:11,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:11,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:10:11,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614270716] [2023-12-02 18:10:11,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:11,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:10:11,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:10:11,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:10:11,890 INFO L87 Difference]: Start difference. First operand 846 states and 1055 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 18:10:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:12,101 INFO L93 Difference]: Finished difference Result 1411 states and 1786 transitions. [2023-12-02 18:10:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:10:12,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 103 [2023-12-02 18:10:12,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:12,106 INFO L225 Difference]: With dead ends: 1411 [2023-12-02 18:10:12,106 INFO L226 Difference]: Without dead ends: 834 [2023-12-02 18:10:12,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:10:12,108 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 7 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:12,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 577 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-12-02 18:10:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 784. [2023-12-02 18:10:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 573 states have (on average 1.212914485165794) internal successors, (695), 580 states have internal predecessors, (695), 130 states have call successors, (130), 80 states have call predecessors, (130), 80 states have return successors, (130), 123 states have call predecessors, (130), 130 states have call successors, (130) [2023-12-02 18:10:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 955 transitions. [2023-12-02 18:10:12,255 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 955 transitions. Word has length 103 [2023-12-02 18:10:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:12,255 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 955 transitions. [2023-12-02 18:10:12,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 18:10:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 955 transitions. [2023-12-02 18:10:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 18:10:12,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:12,257 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:12,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 18:10:12,257 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:10:12,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1582484413, now seen corresponding path program 1 times [2023-12-02 18:10:12,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:12,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194758263] [2023-12-02 18:10:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:12,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 18:10:12,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:12,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194758263] [2023-12-02 18:10:12,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194758263] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:12,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:12,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:10:12,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374428593] [2023-12-02 18:10:12,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:12,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:10:12,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:10:12,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:10:12,362 INFO L87 Difference]: Start difference. First operand 784 states and 955 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-12-02 18:10:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:12,553 INFO L93 Difference]: Finished difference Result 1254 states and 1557 transitions. [2023-12-02 18:10:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:10:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 119 [2023-12-02 18:10:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:12,557 INFO L225 Difference]: With dead ends: 1254 [2023-12-02 18:10:12,557 INFO L226 Difference]: Without dead ends: 772 [2023-12-02 18:10:12,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:10:12,558 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 6 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:12,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 568 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-12-02 18:10:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 756. [2023-12-02 18:10:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 553 states have (on average 1.1916817359855334) internal successors, (659), 560 states have internal predecessors, (659), 124 states have call successors, (124), 78 states have call predecessors, (124), 78 states have return successors, (124), 117 states have call predecessors, (124), 124 states have call successors, (124) [2023-12-02 18:10:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 907 transitions. [2023-12-02 18:10:12,703 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 907 transitions. Word has length 119 [2023-12-02 18:10:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:12,703 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 907 transitions. [2023-12-02 18:10:12,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-12-02 18:10:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 907 transitions. [2023-12-02 18:10:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 18:10:12,705 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:12,705 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2023-12-02 18:10:12,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 18:10:12,706 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:10:12,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -461796259, now seen corresponding path program 1 times [2023-12-02 18:10:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:12,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446447975] [2023-12-02 18:10:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:12,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 18:10:13,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:13,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446447975] [2023-12-02 18:10:13,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446447975] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:13,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268960430] [2023-12-02 18:10:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:13,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:13,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:13,357 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:13,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 18:10:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:13,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:10:13,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:10:13,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 18:10:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268960430] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538494952] [2023-12-02 18:10:13,762 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-12-02 18:10:13,762 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:13,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:10:13,762 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:10:13,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:10:21,304 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 134 for LOIs [2023-12-02 18:10:21,485 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2023-12-02 18:10:21,497 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2023-12-02 18:10:22,147 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-12-02 18:10:22,210 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:10:32,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [538494952] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:32,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:32,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [9, 9, 9] total 57 [2023-12-02 18:10:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931060229] [2023-12-02 18:10:32,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:32,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 18:10:32,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 18:10:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2796, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 18:10:32,896 INFO L87 Difference]: Start difference. First operand 756 states and 907 transitions. Second operand has 39 states, 32 states have (on average 1.71875) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-02 18:10:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:36,841 INFO L93 Difference]: Finished difference Result 1296 states and 1572 transitions. [2023-12-02 18:10:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 18:10:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 1.71875) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 128 [2023-12-02 18:10:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:36,845 INFO L225 Difference]: With dead ends: 1296 [2023-12-02 18:10:36,845 INFO L226 Difference]: Without dead ends: 788 [2023-12-02 18:10:36,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 333 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=413, Invalid=3009, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 18:10:36,847 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 103 mSDsluCounter, 2182 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:36,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2340 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 18:10:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2023-12-02 18:10:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 756. [2023-12-02 18:10:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 553 states have (on average 1.1898734177215189) internal successors, (658), 560 states have internal predecessors, (658), 124 states have call successors, (124), 78 states have call predecessors, (124), 78 states have return successors, (124), 117 states have call predecessors, (124), 124 states have call successors, (124) [2023-12-02 18:10:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 906 transitions. [2023-12-02 18:10:36,993 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 906 transitions. Word has length 128 [2023-12-02 18:10:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:36,994 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 906 transitions. [2023-12-02 18:10:36,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 1.71875) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-02 18:10:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 906 transitions. [2023-12-02 18:10:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 18:10:36,995 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:36,995 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2023-12-02 18:10:37,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 18:10:37,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 18:10:37,196 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:10:37,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1069362131, now seen corresponding path program 1 times [2023-12-02 18:10:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:37,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854566294] [2023-12-02 18:10:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:37,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 18:10:37,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:37,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854566294] [2023-12-02 18:10:37,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854566294] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:37,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629884664] [2023-12-02 18:10:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:37,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:37,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:37,849 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:37,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 18:10:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:37,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 18:10:37,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 18:10:38,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 18:10:38,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629884664] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:38,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1822667826] [2023-12-02 18:10:38,951 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2023-12-02 18:10:38,951 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:38,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:10:38,951 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:10:38,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:10:50,376 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 154 for LOIs [2023-12-02 18:10:51,273 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2023-12-02 18:10:51,286 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 93 for LOIs [2023-12-02 18:10:51,433 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 109 for LOIs [2023-12-02 18:10:51,505 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 120 for LOIs [2023-12-02 18:10:51,665 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 105 for LOIs [2023-12-02 18:10:51,749 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:11:08,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1822667826] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:11:08,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:11:08,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [9, 11, 9] total 75 [2023-12-02 18:11:08,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632574410] [2023-12-02 18:11:08,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:11:08,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-02 18:11:08,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:11:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-02 18:11:08,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=4700, Unknown=0, NotChecked=0, Total=5550 [2023-12-02 18:11:08,316 INFO L87 Difference]: Start difference. First operand 756 states and 906 transitions. Second operand has 52 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 36 states have internal predecessors, (57), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 18:11:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:11:18,608 INFO L93 Difference]: Finished difference Result 1393 states and 1692 transitions. [2023-12-02 18:11:18,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-02 18:11:18,609 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 36 states have internal predecessors, (57), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 136 [2023-12-02 18:11:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:11:18,613 INFO L225 Difference]: With dead ends: 1393 [2023-12-02 18:11:18,614 INFO L226 Difference]: Without dead ends: 894 [2023-12-02 18:11:18,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 338 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3375 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=1336, Invalid=7594, Unknown=0, NotChecked=0, Total=8930 [2023-12-02 18:11:18,617 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 193 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 3777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:11:18,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 3439 Invalid, 3777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3706 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-12-02 18:11:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-12-02 18:11:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 868. [2023-12-02 18:11:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 637 states have (on average 1.1821036106750393) internal successors, (753), 644 states have internal predecessors, (753), 140 states have call successors, (140), 90 states have call predecessors, (140), 90 states have return successors, (140), 133 states have call predecessors, (140), 140 states have call successors, (140) [2023-12-02 18:11:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1033 transitions. [2023-12-02 18:11:18,822 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1033 transitions. Word has length 136 [2023-12-02 18:11:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:11:18,822 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1033 transitions. [2023-12-02 18:11:18,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 36 states have internal predecessors, (57), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 18:11:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1033 transitions. [2023-12-02 18:11:18,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 18:11:18,824 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:11:18,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:11:18,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 18:11:19,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:19,025 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:11:19,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:11:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash 437519117, now seen corresponding path program 1 times [2023-12-02 18:11:19,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:11:19,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563053383] [2023-12-02 18:11:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:19,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:11:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 18:11:19,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:11:19,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563053383] [2023-12-02 18:11:19,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563053383] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:11:19,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175891735] [2023-12-02 18:11:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:19,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:19,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:11:19,404 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:11:19,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560268a5-1021-4c6d-8b03-ea9d1ef6a253/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 18:11:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:19,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 18:11:19,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:11:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 65 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 18:11:19,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:11:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 18:11:20,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175891735] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:11:20,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712179808] [2023-12-02 18:11:20,297 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2023-12-02 18:11:20,298 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:11:20,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:11:20,298 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:11:20,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs