./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1fa78b32466948213cdbfc05d3adcde2ac2fc14323ec3ac2f4b441976452676 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:18:34,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:18:34,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:18:34,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:18:34,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:18:34,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:18:34,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:18:34,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:18:34,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:18:34,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:18:34,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:18:34,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:18:34,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:18:34,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:18:34,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:18:34,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:18:34,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:18:34,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:18:34,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:18:34,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:18:34,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:18:34,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:18:34,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:18:34,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:18:34,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:18:34,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:18:34,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:18:34,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:18:34,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:18:34,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:18:34,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:18:34,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:18:34,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:18:34,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:18:34,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:18:34,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:18:34,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:18:34,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:18:34,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:18:34,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:18:34,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:18:34,143 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:18:34,174 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:18:34,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:18:34,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:18:34,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:18:34,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:18:34,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:18:34,176 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:18:34,176 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:18:34,176 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:18:34,177 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:18:34,177 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:18:34,177 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:18:34,177 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:18:34,177 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:18:34,177 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:18:34,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:18:34,178 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:18:34,178 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:18:34,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:18:34,179 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:18:34,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:18:34,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:18:34,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:18:34,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:18:34,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:18:34,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:18:34,180 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:18:34,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:18:34,180 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:18:34,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:18:34,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:18:34,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:18:34,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:18:34,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:18:34,181 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:18:34,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:18:34,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:18:34,181 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:18:34,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:18:34,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:18:34,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:18:34,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1fa78b32466948213cdbfc05d3adcde2ac2fc14323ec3ac2f4b441976452676 [2022-12-14 14:18:34,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:18:34,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:18:34,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:18:34,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:18:34,392 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:18:34,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c [2022-12-14 14:18:37,066 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:18:37,262 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:18:37,263 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c [2022-12-14 14:18:37,270 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/data/8241837fa/0295bc437eab4474bd8d18155ab7cc29/FLAG1fc27c109 [2022-12-14 14:18:37,280 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/data/8241837fa/0295bc437eab4474bd8d18155ab7cc29 [2022-12-14 14:18:37,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:18:37,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:18:37,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:18:37,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:18:37,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:18:37,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4659105e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37, skipping insertion in model container [2022-12-14 14:18:37,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:18:37,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:18:37,478 WARN L237 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_aedbab77-eb5a-4102-90ef-274b96875ae0/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c[14595,14608] [2022-12-14 14:18:37,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:18:37,489 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:18:37,531 WARN L237 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_aedbab77-eb5a-4102-90ef-274b96875ae0/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c[14595,14608] [2022-12-14 14:18:37,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:18:37,543 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:18:37,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37 WrapperNode [2022-12-14 14:18:37,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:18:37,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:18:37,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:18:37,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:18:37,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,581 INFO L138 Inliner]: procedures = 32, calls = 47, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 483 [2022-12-14 14:18:37,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:18:37,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:18:37,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:18:37,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:18:37,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,605 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:18:37,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:18:37,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:18:37,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:18:37,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (1/1) ... [2022-12-14 14:18:37,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:18:37,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:18:37,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:18:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:18:37,669 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-12-14 14:18:37,669 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-12-14 14:18:37,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:18:37,669 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-12-14 14:18:37,669 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-12-14 14:18:37,669 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-12-14 14:18:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-12-14 14:18:37,670 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 14:18:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 14:18:37,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:18:37,670 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-12-14 14:18:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-12-14 14:18:37,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:18:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:18:37,671 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-12-14 14:18:37,671 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-12-14 14:18:37,751 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:18:37,753 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:18:38,132 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:18:38,263 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:18:38,263 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 14:18:38,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:18:38 BoogieIcfgContainer [2022-12-14 14:18:38,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:18:38,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:18:38,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:18:38,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:18:38,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:18:37" (1/3) ... [2022-12-14 14:18:38,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c679fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:18:38, skipping insertion in model container [2022-12-14 14:18:38,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:18:37" (2/3) ... [2022-12-14 14:18:38,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c679fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:18:38, skipping insertion in model container [2022-12-14 14:18:38,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:18:38" (3/3) ... [2022-12-14 14:18:38,274 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c [2022-12-14 14:18:38,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:18:38,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:18:38,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:18:38,339 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@225c8084, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:18:38,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:18:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 105 states have (on average 1.5238095238095237) internal successors, (160), 106 states have internal predecessors, (160), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 14:18:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 14:18:38,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:38,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:18:38,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:38,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1098235099, now seen corresponding path program 1 times [2022-12-14 14:18:38,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:38,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432722574] [2022-12-14 14:18:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:38,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:18:38,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:38,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432722574] [2022-12-14 14:18:38,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432722574] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:38,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:18:38,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:18:38,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239777072] [2022-12-14 14:18:38,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:38,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:18:38,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:18:38,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:18:38,710 INFO L87 Difference]: Start difference. First operand has 142 states, 105 states have (on average 1.5238095238095237) internal successors, (160), 106 states have internal predecessors, (160), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) 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) [2022-12-14 14:18:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:18:38,800 INFO L93 Difference]: Finished difference Result 285 states and 463 transitions. [2022-12-14 14:18:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:18:38,802 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 [2022-12-14 14:18:38,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:18:38,809 INFO L225 Difference]: With dead ends: 285 [2022-12-14 14:18:38,809 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 14:18:38,812 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 [2022-12-14 14:18:38,814 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 5 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:18:38,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 596 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:18:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 14:18:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-12-14 14:18:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 108 states have internal predecessors, (161), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 14:18:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 219 transitions. [2022-12-14 14:18:38,852 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 219 transitions. Word has length 19 [2022-12-14 14:18:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:18:38,852 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 219 transitions. [2022-12-14 14:18:38,852 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) [2022-12-14 14:18:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 219 transitions. [2022-12-14 14:18:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 14:18:38,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:38,854 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] [2022-12-14 14:18:38,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:18:38,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:38,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:38,854 INFO L85 PathProgramCache]: Analyzing trace with hash -360818056, now seen corresponding path program 1 times [2022-12-14 14:18:38,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:38,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545375312] [2022-12-14 14:18:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:38,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:18:38,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:38,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545375312] [2022-12-14 14:18:38,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545375312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:38,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:18:38,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:18:38,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868789068] [2022-12-14 14:18:38,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:38,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:18:38,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:38,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:18:38,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:18:38,953 INFO L87 Difference]: Start difference. First operand 145 states and 219 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:18:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:18:39,185 INFO L93 Difference]: Finished difference Result 405 states and 624 transitions. [2022-12-14 14:18:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:18:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-12-14 14:18:39,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:18:39,188 INFO L225 Difference]: With dead ends: 405 [2022-12-14 14:18:39,189 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 14:18:39,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:18:39,191 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 524 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:18:39,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 552 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:18:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 14:18:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 171. [2022-12-14 14:18:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 132 states have (on average 1.4848484848484849) internal successors, (196), 132 states have internal predecessors, (196), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 14:18:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 256 transitions. [2022-12-14 14:18:39,220 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 256 transitions. Word has length 30 [2022-12-14 14:18:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:18:39,220 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 256 transitions. [2022-12-14 14:18:39,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:18:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 256 transitions. [2022-12-14 14:18:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 14:18:39,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:39,222 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] [2022-12-14 14:18:39,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:18:39,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:39,223 INFO L85 PathProgramCache]: Analyzing trace with hash 836378265, now seen corresponding path program 1 times [2022-12-14 14:18:39,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:39,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418556977] [2022-12-14 14:18:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:39,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:18:39,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:39,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418556977] [2022-12-14 14:18:39,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418556977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:39,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:18:39,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:18:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327115620] [2022-12-14 14:18:39,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:39,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:18:39,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:18:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:18:39,323 INFO L87 Difference]: Start difference. First operand 171 states and 256 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:18:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:18:39,532 INFO L93 Difference]: Finished difference Result 405 states and 622 transitions. [2022-12-14 14:18:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:18:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-12-14 14:18:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:18:39,535 INFO L225 Difference]: With dead ends: 405 [2022-12-14 14:18:39,535 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 14:18:39,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:18:39,537 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 520 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:18:39,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 555 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:18:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 14:18:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 171. [2022-12-14 14:18:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 14:18:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 255 transitions. [2022-12-14 14:18:39,567 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 255 transitions. Word has length 31 [2022-12-14 14:18:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:18:39,567 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 255 transitions. [2022-12-14 14:18:39,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:18:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 255 transitions. [2022-12-14 14:18:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 14:18:39,568 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:39,569 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] [2022-12-14 14:18:39,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:18:39,569 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2101054727, now seen corresponding path program 1 times [2022-12-14 14:18:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:39,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612266173] [2022-12-14 14:18:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:39,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:18:39,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:39,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612266173] [2022-12-14 14:18:39,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612266173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:39,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:18:39,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:18:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968681474] [2022-12-14 14:18:39,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:39,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:18:39,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:18:39,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:18:39,712 INFO L87 Difference]: Start difference. First operand 171 states and 255 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-12-14 14:18:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:18:39,766 INFO L93 Difference]: Finished difference Result 318 states and 477 transitions. [2022-12-14 14:18:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:18:39,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 33 [2022-12-14 14:18:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:18:39,768 INFO L225 Difference]: With dead ends: 318 [2022-12-14 14:18:39,768 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 14:18:39,769 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 [2022-12-14 14:18:39,770 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 6 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 608 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 [2022-12-14 14:18:39,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 608 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:18:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 14:18:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-12-14 14:18:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 136 states have (on average 1.463235294117647) internal successors, (199), 136 states have internal predecessors, (199), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 14:18:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 259 transitions. [2022-12-14 14:18:39,787 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 259 transitions. Word has length 33 [2022-12-14 14:18:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:18:39,788 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 259 transitions. [2022-12-14 14:18:39,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-12-14 14:18:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 259 transitions. [2022-12-14 14:18:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 14:18:39,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:39,789 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] [2022-12-14 14:18:39,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:18:39,790 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:39,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1631170125, now seen corresponding path program 1 times [2022-12-14 14:18:39,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:39,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681037110] [2022-12-14 14:18:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:39,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:18:39,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681037110] [2022-12-14 14:18:39,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681037110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:39,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:18:39,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:18:39,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804777826] [2022-12-14 14:18:39,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:39,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:18:39,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:18:39,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:18:39,953 INFO L87 Difference]: Start difference. First operand 176 states and 259 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-12-14 14:18:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:18:40,013 INFO L93 Difference]: Finished difference Result 328 states and 488 transitions. [2022-12-14 14:18:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:18:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 41 [2022-12-14 14:18:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:18:40,015 INFO L225 Difference]: With dead ends: 328 [2022-12-14 14:18:40,015 INFO L226 Difference]: Without dead ends: 181 [2022-12-14 14:18:40,016 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 [2022-12-14 14:18:40,017 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 6 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:18:40,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 594 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:18:40,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-14 14:18:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-12-14 14:18:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 140 states have (on average 1.45) internal successors, (203), 140 states have internal predecessors, (203), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 14:18:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 263 transitions. [2022-12-14 14:18:40,034 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 263 transitions. Word has length 41 [2022-12-14 14:18:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:18:40,034 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 263 transitions. [2022-12-14 14:18:40,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-12-14 14:18:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 263 transitions. [2022-12-14 14:18:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 14:18:40,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:40,036 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, 1, 1, 1, 1, 1] [2022-12-14 14:18:40,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:18:40,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:40,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1958121417, now seen corresponding path program 1 times [2022-12-14 14:18:40,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:40,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824406864] [2022-12-14 14:18:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:40,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:18:40,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824406864] [2022-12-14 14:18:40,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824406864] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:40,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:18:40,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:18:40,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990424026] [2022-12-14 14:18:40,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:40,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:18:40,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:18:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:18:40,185 INFO L87 Difference]: Start difference. First operand 181 states and 263 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-12-14 14:18:40,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:18:40,233 INFO L93 Difference]: Finished difference Result 337 states and 492 transitions. [2022-12-14 14:18:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:18:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 49 [2022-12-14 14:18:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:18:40,234 INFO L225 Difference]: With dead ends: 337 [2022-12-14 14:18:40,234 INFO L226 Difference]: Without dead ends: 185 [2022-12-14 14:18:40,235 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 [2022-12-14 14:18:40,236 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 5 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:18:40,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 603 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:18:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-14 14:18:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-12-14 14:18:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 143 states have (on average 1.4405594405594406) internal successors, (206), 143 states have internal predecessors, (206), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 14:18:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2022-12-14 14:18:40,248 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 49 [2022-12-14 14:18:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:18:40,248 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2022-12-14 14:18:40,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-12-14 14:18:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2022-12-14 14:18:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 14:18:40,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:40,249 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:18:40,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:18:40,250 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash 438337886, now seen corresponding path program 1 times [2022-12-14 14:18:40,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:40,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902709581] [2022-12-14 14:18:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:18:40,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:40,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902709581] [2022-12-14 14:18:40,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902709581] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:40,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:18:40,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:18:40,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488701592] [2022-12-14 14:18:40,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:40,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:18:40,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:18:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:18:40,363 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-12-14 14:18:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:18:40,418 INFO L93 Difference]: Finished difference Result 346 states and 502 transitions. [2022-12-14 14:18:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:18:40,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 49 [2022-12-14 14:18:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:18:40,419 INFO L225 Difference]: With dead ends: 346 [2022-12-14 14:18:40,419 INFO L226 Difference]: Without dead ends: 190 [2022-12-14 14:18:40,420 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 [2022-12-14 14:18:40,421 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 6 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:18:40,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 594 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:18:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-14 14:18:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-12-14 14:18:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 147 states have (on average 1.4285714285714286) internal successors, (210), 147 states have internal predecessors, (210), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 14:18:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 270 transitions. [2022-12-14 14:18:40,433 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 270 transitions. Word has length 49 [2022-12-14 14:18:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:18:40,434 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 270 transitions. [2022-12-14 14:18:40,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-12-14 14:18:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 270 transitions. [2022-12-14 14:18:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 14:18:40,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:40,435 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, 1, 1, 1, 1, 1] [2022-12-14 14:18:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:18:40,435 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash -98740126, now seen corresponding path program 1 times [2022-12-14 14:18:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992929451] [2022-12-14 14:18:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:40,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 14:18:40,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:40,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992929451] [2022-12-14 14:18:40,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992929451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:40,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:18:40,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:18:40,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269723788] [2022-12-14 14:18:40,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:40,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:18:40,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:18:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:18:40,568 INFO L87 Difference]: Start difference. First operand 190 states and 270 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-12-14 14:18:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:18:40,613 INFO L93 Difference]: Finished difference Result 357 states and 509 transitions. [2022-12-14 14:18:40,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:18:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 57 [2022-12-14 14:18:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:18:40,615 INFO L225 Difference]: With dead ends: 357 [2022-12-14 14:18:40,615 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 14:18:40,615 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 [2022-12-14 14:18:40,616 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 7 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:18:40,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 605 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:18:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 14:18:40,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-12-14 14:18:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 152 states have (on average 1.4144736842105263) internal successors, (215), 152 states have internal predecessors, (215), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 14:18:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 275 transitions. [2022-12-14 14:18:40,625 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 275 transitions. Word has length 57 [2022-12-14 14:18:40,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:18:40,625 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 275 transitions. [2022-12-14 14:18:40,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-12-14 14:18:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 275 transitions. [2022-12-14 14:18:40,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 14:18:40,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:40,626 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, 1] [2022-12-14 14:18:40,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:18:40,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:40,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash -146721335, now seen corresponding path program 1 times [2022-12-14 14:18:40,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:40,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026956009] [2022-12-14 14:18:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:40,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:18:40,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:40,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026956009] [2022-12-14 14:18:40,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026956009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:18:40,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123741978] [2022-12-14 14:18:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:40,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:18:40,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:18:40,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:18:40,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:18:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:40,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 14:18:40,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:18:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:18:41,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:18:41,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123741978] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:41,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:18:41,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-12-14 14:18:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407175362] [2022-12-14 14:18:41,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:41,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:18:41,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:18:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:18:41,178 INFO L87 Difference]: Start difference. First operand 196 states and 275 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 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) [2022-12-14 14:18:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:18:41,460 INFO L93 Difference]: Finished difference Result 569 states and 790 transitions. [2022-12-14 14:18:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 14:18:41,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 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 60 [2022-12-14 14:18:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:18:41,462 INFO L225 Difference]: With dead ends: 569 [2022-12-14 14:18:41,462 INFO L226 Difference]: Without dead ends: 376 [2022-12-14 14:18:41,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-12-14 14:18:41,463 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 208 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:18:41,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1261 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:18:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-12-14 14:18:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 372. [2022-12-14 14:18:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 286 states have (on average 1.4055944055944056) internal successors, (402), 287 states have internal predecessors, (402), 59 states have call successors, (59), 26 states have call predecessors, (59), 26 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2022-12-14 14:18:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 520 transitions. [2022-12-14 14:18:41,496 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 520 transitions. Word has length 60 [2022-12-14 14:18:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:18:41,496 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 520 transitions. [2022-12-14 14:18:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 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) [2022-12-14 14:18:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 520 transitions. [2022-12-14 14:18:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 14:18:41,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:18:41,497 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, 1, 1, 1] [2022-12-14 14:18:41,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:18:41,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:18:41,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:18:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:18:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -218754164, now seen corresponding path program 1 times [2022-12-14 14:18:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:18:41,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222317544] [2022-12-14 14:18:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:41,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:18:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:18:41,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:18:41,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222317544] [2022-12-14 14:18:41,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222317544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:18:41,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824013723] [2022-12-14 14:18:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:18:41,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:18:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:18:41,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:18:41,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:18:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:18:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 14:18:42,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:18:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:18:42,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:18:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:18:42,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824013723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:18:42,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583206910] [2022-12-14 14:18:42,478 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 14:18:42,478 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:18:42,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:18:42,485 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:18:42,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:18:45,014 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 14:18:45,036 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 14:18:45,052 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 14:18:45,095 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:18:57,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1583206910] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:18:57,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:18:57,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 14:18:57,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333562741] [2022-12-14 14:18:57,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:18:57,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 14:18:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:18:57,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 14:18:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 14:18:57,265 INFO L87 Difference]: Start difference. First operand 372 states and 520 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:19:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:19:02,234 INFO L93 Difference]: Finished difference Result 804 states and 1134 transitions. [2022-12-14 14:19:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 14:19:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-12-14 14:19:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:19:02,238 INFO L225 Difference]: With dead ends: 804 [2022-12-14 14:19:02,238 INFO L226 Difference]: Without dead ends: 457 [2022-12-14 14:19:02,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 14:19:02,239 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 147 mSDsluCounter, 3041 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 3326 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:19:02,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 3326 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2046 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 14:19:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-12-14 14:19:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 434. [2022-12-14 14:19:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 330 states have (on average 1.378787878787879) internal successors, (455), 331 states have internal predecessors, (455), 74 states have call successors, (74), 29 states have call predecessors, (74), 29 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-12-14 14:19:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 603 transitions. [2022-12-14 14:19:02,282 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 603 transitions. Word has length 62 [2022-12-14 14:19:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:19:02,283 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 603 transitions. [2022-12-14 14:19:02,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:19:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 603 transitions. [2022-12-14 14:19:02,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 14:19:02,284 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:19:02,284 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, 1, 1, 1] [2022-12-14 14:19:02,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 14:19:02,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 14:19:02,484 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:19:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:19:02,485 INFO L85 PathProgramCache]: Analyzing trace with hash -255386307, now seen corresponding path program 1 times [2022-12-14 14:19:02,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:19:02,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592612220] [2022-12-14 14:19:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:19:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:19:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:19:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:19:02,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:19:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592612220] [2022-12-14 14:19:02,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592612220] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:19:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095601979] [2022-12-14 14:19:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:19:02,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:19:02,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:19:02,729 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:19:02,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:19:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:19:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 14:19:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:19:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:19:02,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:19:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:19:03,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095601979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:19:03,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276697408] [2022-12-14 14:19:03,105 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 14:19:03,105 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:19:03,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:19:03,106 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:19:03,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:19:04,502 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 14:19:04,524 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 14:19:04,540 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 14:19:04,583 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:19:17,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1276697408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:19:17,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:19:17,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 14:19:17,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156891191] [2022-12-14 14:19:17,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:19:17,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 14:19:17,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:19:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 14:19:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 14:19:17,047 INFO L87 Difference]: Start difference. First operand 434 states and 603 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:19:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:19:20,872 INFO L93 Difference]: Finished difference Result 847 states and 1189 transitions. [2022-12-14 14:19:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 14:19:20,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-12-14 14:19:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:19:20,874 INFO L225 Difference]: With dead ends: 847 [2022-12-14 14:19:20,874 INFO L226 Difference]: Without dead ends: 507 [2022-12-14 14:19:20,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 14:19:20,875 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 60 mSDsluCounter, 2501 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2769 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:19:20,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2769 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 14:19:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-12-14 14:19:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 484. [2022-12-14 14:19:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 363 states have (on average 1.3636363636363635) internal successors, (495), 364 states have internal predecessors, (495), 88 states have call successors, (88), 32 states have call predecessors, (88), 32 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2022-12-14 14:19:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 671 transitions. [2022-12-14 14:19:20,938 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 671 transitions. Word has length 62 [2022-12-14 14:19:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:19:20,939 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 671 transitions. [2022-12-14 14:19:20,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:19:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 671 transitions. [2022-12-14 14:19:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 14:19:20,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:19:20,939 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, 1, 1, 1, 1, 1] [2022-12-14 14:19:20,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 14:19:21,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 14:19:21,141 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:19:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:19:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash -759458240, now seen corresponding path program 1 times [2022-12-14 14:19:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:19:21,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404286360] [2022-12-14 14:19:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:19:21,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:19:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:19:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:19:21,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:19:21,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404286360] [2022-12-14 14:19:21,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404286360] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:19:21,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457448021] [2022-12-14 14:19:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:19:21,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:19:21,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:19:21,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:19:21,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:19:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:19:21,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 14:19:21,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:19:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:19:21,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:19:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:19:21,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457448021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:19:21,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428731970] [2022-12-14 14:19:21,741 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-12-14 14:19:21,741 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:19:21,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:19:21,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:19:21,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:19:23,794 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 14:19:23,815 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 14:19:23,831 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 14:19:23,872 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:19:37,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1428731970] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:19:37,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:19:37,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2022-12-14 14:19:37,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653449365] [2022-12-14 14:19:37,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:19:37,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 14:19:37,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:19:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 14:19:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 14:19:37,793 INFO L87 Difference]: Start difference. First operand 484 states and 671 transitions. Second operand has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:19:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:19:42,920 INFO L93 Difference]: Finished difference Result 897 states and 1260 transitions. [2022-12-14 14:19:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 14:19:42,921 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2022-12-14 14:19:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:19:42,922 INFO L225 Difference]: With dead ends: 897 [2022-12-14 14:19:42,922 INFO L226 Difference]: Without dead ends: 557 [2022-12-14 14:19:42,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 14:19:42,923 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 69 mSDsluCounter, 3739 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 4039 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:19:42,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 4039 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-12-14 14:19:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-12-14 14:19:42,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 508. [2022-12-14 14:19:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 379 states have (on average 1.345646437994723) internal successors, (510), 380 states have internal predecessors, (510), 94 states have call successors, (94), 34 states have call predecessors, (94), 34 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-12-14 14:19:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 698 transitions. [2022-12-14 14:19:43,001 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 698 transitions. Word has length 64 [2022-12-14 14:19:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:19:43,001 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 698 transitions. [2022-12-14 14:19:43,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:19:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 698 transitions. [2022-12-14 14:19:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 14:19:43,002 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:19:43,002 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] [2022-12-14 14:19:43,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:19:43,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:19:43,203 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:19:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:19:43,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2061388763, now seen corresponding path program 1 times [2022-12-14 14:19:43,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:19:43,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823094619] [2022-12-14 14:19:43,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:19:43,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:19:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:19:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:19:43,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:19:43,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823094619] [2022-12-14 14:19:43,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823094619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:19:43,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:19:43,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:19:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300257265] [2022-12-14 14:19:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:19:43,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:19:43,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:19:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:19:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:19:43,290 INFO L87 Difference]: Start difference. First operand 508 states and 698 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-12-14 14:19:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:19:43,422 INFO L93 Difference]: Finished difference Result 908 states and 1274 transitions. [2022-12-14 14:19:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:19:43,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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 66 [2022-12-14 14:19:43,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:19:43,424 INFO L225 Difference]: With dead ends: 908 [2022-12-14 14:19:43,424 INFO L226 Difference]: Without dead ends: 516 [2022-12-14 14:19:43,425 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 [2022-12-14 14:19:43,426 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 5 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:19:43,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 603 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:19:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-12-14 14:19:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2022-12-14 14:19:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 385 states have (on average 1.3402597402597403) internal successors, (516), 386 states have internal predecessors, (516), 94 states have call successors, (94), 36 states have call predecessors, (94), 36 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-12-14 14:19:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 704 transitions. [2022-12-14 14:19:43,504 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 704 transitions. Word has length 66 [2022-12-14 14:19:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:19:43,504 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 704 transitions. [2022-12-14 14:19:43,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-12-14 14:19:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 704 transitions. [2022-12-14 14:19:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 14:19:43,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:19:43,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:19:43,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 14:19:43,505 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:19:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:19:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1192951908, now seen corresponding path program 1 times [2022-12-14 14:19:43,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:19:43,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461908866] [2022-12-14 14:19:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:19:43,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:19:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:19:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:19:43,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:19:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461908866] [2022-12-14 14:19:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461908866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:19:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303174638] [2022-12-14 14:19:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:19:43,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:19:43,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:19:43,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:19:43,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:19:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:19:43,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 14:19:43,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:19:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:19:43,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:19:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:19:44,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303174638] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:19:44,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290144487] [2022-12-14 14:19:44,069 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-12-14 14:19:44,069 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:19:44,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:19:44,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:19:44,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:19:47,439 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-12-14 14:19:47,637 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 14:19:47,653 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 182 for LOIs [2022-12-14 14:19:47,770 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-12-14 14:19:47,803 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 14:19:47,853 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 14:19:47,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:20:24,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15834#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s2p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s2s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s1s1_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256)))) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (not (= (mod ~side2Failed~0 256) 0)) (= assert_~arg |assert_#in~arg|) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side1_written~0 1) (= ~s1s2~0 0) (= ~nomsg~0 ~s2p_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256))) ~s1s2_old~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= ~s1p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256)))) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~nomsg~0 ~side2_written~0) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (= ~nomsg~0 ~s2s2_new~0) (= (mod ~side1Failed~0 256) 0) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256))) ~s2s1_old~0) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 14:20:24,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:20:24,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:20:24,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-12-14 14:20:24,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920312005] [2022-12-14 14:20:24,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:20:24,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 14:20:24,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:20:24,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 14:20:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 14:20:24,332 INFO L87 Difference]: Start difference. First operand 516 states and 704 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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) [2022-12-14 14:20:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:20:24,818 INFO L93 Difference]: Finished difference Result 1240 states and 1722 transitions. [2022-12-14 14:20:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 14:20:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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 70 [2022-12-14 14:20:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:20:24,821 INFO L225 Difference]: With dead ends: 1240 [2022-12-14 14:20:24,821 INFO L226 Difference]: Without dead ends: 856 [2022-12-14 14:20:24,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=397, Invalid=3143, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 14:20:24,823 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 298 mSDsluCounter, 2700 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:20:24,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 3030 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:20:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-12-14 14:20:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 533. [2022-12-14 14:20:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 395 states have (on average 1.2936708860759494) internal successors, (511), 397 states have internal predecessors, (511), 92 states have call successors, (92), 45 states have call predecessors, (92), 45 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 14:20:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 695 transitions. [2022-12-14 14:20:24,921 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 695 transitions. Word has length 70 [2022-12-14 14:20:24,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:20:24,922 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 695 transitions. [2022-12-14 14:20:24,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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) [2022-12-14 14:20:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 695 transitions. [2022-12-14 14:20:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 14:20:24,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:20:24,923 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, 1, 1, 1] [2022-12-14 14:20:24,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:20:25,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 14:20:25,125 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:20:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:20:25,126 INFO L85 PathProgramCache]: Analyzing trace with hash 995649641, now seen corresponding path program 1 times [2022-12-14 14:20:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:20:25,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425539187] [2022-12-14 14:20:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:20:25,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:20:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:20:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:20:25,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:20:25,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425539187] [2022-12-14 14:20:25,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425539187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:20:25,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:20:25,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 14:20:25,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95724384] [2022-12-14 14:20:25,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:20:25,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:20:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:20:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:20:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:20:25,353 INFO L87 Difference]: Start difference. First operand 533 states and 695 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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) [2022-12-14 14:20:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:20:25,955 INFO L93 Difference]: Finished difference Result 1175 states and 1614 transitions. [2022-12-14 14:20:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:20:25,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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 71 [2022-12-14 14:20:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:20:25,958 INFO L225 Difference]: With dead ends: 1175 [2022-12-14 14:20:25,958 INFO L226 Difference]: Without dead ends: 880 [2022-12-14 14:20:25,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:20:25,959 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 519 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:20:25,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 2263 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:20:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-12-14 14:20:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 672. [2022-12-14 14:20:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 497 states have (on average 1.3058350100603622) internal successors, (649), 500 states have internal predecessors, (649), 116 states have call successors, (116), 58 states have call predecessors, (116), 58 states have return successors, (116), 113 states have call predecessors, (116), 116 states have call successors, (116) [2022-12-14 14:20:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 881 transitions. [2022-12-14 14:20:26,076 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 881 transitions. Word has length 71 [2022-12-14 14:20:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:20:26,076 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 881 transitions. [2022-12-14 14:20:26,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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) [2022-12-14 14:20:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 881 transitions. [2022-12-14 14:20:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 14:20:26,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:20:26,077 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, 1, 1, 1, 1, 1] [2022-12-14 14:20:26,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 14:20:26,077 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:20:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:20:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2088870191, now seen corresponding path program 1 times [2022-12-14 14:20:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:20:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287331958] [2022-12-14 14:20:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:20:26,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:20:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:20:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:20:26,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:20:26,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287331958] [2022-12-14 14:20:26,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287331958] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:20:26,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:20:26,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 14:20:26,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350754295] [2022-12-14 14:20:26,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:20:26,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:20:26,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:20:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:20:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:20:26,225 INFO L87 Difference]: Start difference. First operand 672 states and 881 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-12-14 14:20:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:20:26,992 INFO L93 Difference]: Finished difference Result 1545 states and 2127 transitions. [2022-12-14 14:20:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:20:26,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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 73 [2022-12-14 14:20:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:20:26,995 INFO L225 Difference]: With dead ends: 1545 [2022-12-14 14:20:26,996 INFO L226 Difference]: Without dead ends: 1215 [2022-12-14 14:20:26,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:20:26,998 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 589 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:20:26,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 1677 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:20:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-12-14 14:20:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 928. [2022-12-14 14:20:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 680 states have (on average 1.313235294117647) internal successors, (893), 685 states have internal predecessors, (893), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-12-14 14:20:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1223 transitions. [2022-12-14 14:20:27,158 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1223 transitions. Word has length 73 [2022-12-14 14:20:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:20:27,158 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1223 transitions. [2022-12-14 14:20:27,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-12-14 14:20:27,159 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1223 transitions. [2022-12-14 14:20:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 14:20:27,159 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:20:27,159 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, 1, 1, 1, 1, 1] [2022-12-14 14:20:27,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 14:20:27,159 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:20:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:20:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2043276635, now seen corresponding path program 1 times [2022-12-14 14:20:27,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:20:27,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72999052] [2022-12-14 14:20:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:20:27,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:20:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:20:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:20:27,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:20:27,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72999052] [2022-12-14 14:20:27,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72999052] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:20:27,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108374489] [2022-12-14 14:20:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:20:27,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:20:27,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:20:27,349 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:20:27,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:20:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:20:27,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 14:20:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:20:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:20:27,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:20:27,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108374489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:20:27,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:20:27,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 14:20:27,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18397705] [2022-12-14 14:20:27,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:20:27,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:20:27,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:20:27,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:20:27,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:20:27,528 INFO L87 Difference]: Start difference. First operand 928 states and 1223 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 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) [2022-12-14 14:20:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:20:28,058 INFO L93 Difference]: Finished difference Result 1787 states and 2419 transitions. [2022-12-14 14:20:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:20:28,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 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 77 [2022-12-14 14:20:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:20:28,061 INFO L225 Difference]: With dead ends: 1787 [2022-12-14 14:20:28,061 INFO L226 Difference]: Without dead ends: 1093 [2022-12-14 14:20:28,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-12-14 14:20:28,063 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 488 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:20:28,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1668 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:20:28,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-12-14 14:20:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 928. [2022-12-14 14:20:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 680 states have (on average 1.3073529411764706) internal successors, (889), 685 states have internal predecessors, (889), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-12-14 14:20:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1219 transitions. [2022-12-14 14:20:28,233 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1219 transitions. Word has length 77 [2022-12-14 14:20:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:20:28,233 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1219 transitions. [2022-12-14 14:20:28,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 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) [2022-12-14 14:20:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1219 transitions. [2022-12-14 14:20:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 14:20:28,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:20:28,234 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, 1, 1, 1, 1, 1] [2022-12-14 14:20:28,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:20:28,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 14:20:28,435 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:20:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:20:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash 377498506, now seen corresponding path program 1 times [2022-12-14 14:20:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:20:28,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171009621] [2022-12-14 14:20:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:20:28,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:20:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:20:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:20:28,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:20:28,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171009621] [2022-12-14 14:20:28,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171009621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:20:28,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856788844] [2022-12-14 14:20:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:20:28,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:20:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:20:28,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:20:28,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:20:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:20:28,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:20:28,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:20:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:20:28,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:20:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 14:20:28,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856788844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:20:28,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985210268] [2022-12-14 14:20:28,897 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-12-14 14:20:28,897 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:20:28,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:20:28,898 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:20:28,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:20:31,852 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 14:20:31,873 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 14:20:31,889 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 14:20:31,959 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 14:20:32,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:20:52,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1985210268] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:20:52,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:20:52,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-12-14 14:20:52,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300517969] [2022-12-14 14:20:52,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:20:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 14:20:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:20:52,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 14:20:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 14:20:52,783 INFO L87 Difference]: Start difference. First operand 928 states and 1219 transitions. Second operand has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 14:20:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:20:58,348 INFO L93 Difference]: Finished difference Result 1491 states and 1979 transitions. [2022-12-14 14:20:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 14:20:58,349 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 77 [2022-12-14 14:20:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:20:58,351 INFO L225 Difference]: With dead ends: 1491 [2022-12-14 14:20:58,351 INFO L226 Difference]: Without dead ends: 914 [2022-12-14 14:20:58,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 14:20:58,353 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 101 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:20:58,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 3111 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2512 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 14:20:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-12-14 14:20:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 914. [2022-12-14 14:20:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 670 states have (on average 1.3059701492537314) internal successors, (875), 675 states have internal predecessors, (875), 162 states have call successors, (162), 81 states have call predecessors, (162), 81 states have return successors, (162), 157 states have call predecessors, (162), 162 states have call successors, (162) [2022-12-14 14:20:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1199 transitions. [2022-12-14 14:20:58,513 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1199 transitions. Word has length 77 [2022-12-14 14:20:58,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:20:58,513 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1199 transitions. [2022-12-14 14:20:58,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 14:20:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1199 transitions. [2022-12-14 14:20:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 14:20:58,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:20:58,514 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, 1, 1, 1, 1, 1] [2022-12-14 14:20:58,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 14:20:58,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 14:20:58,715 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:20:58,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:20:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash -871381226, now seen corresponding path program 1 times [2022-12-14 14:20:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:20:58,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114368833] [2022-12-14 14:20:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:20:58,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:20:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:20:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 14:20:58,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:20:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114368833] [2022-12-14 14:20:58,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114368833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:20:58,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:20:58,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:20:58,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786561506] [2022-12-14 14:20:58,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:20:58,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:20:58,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:20:58,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:20:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:20:58,837 INFO L87 Difference]: Start difference. First operand 914 states and 1199 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 14:20:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:20:59,187 INFO L93 Difference]: Finished difference Result 1203 states and 1647 transitions. [2022-12-14 14:20:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:20:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 80 [2022-12-14 14:20:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:20:59,192 INFO L225 Difference]: With dead ends: 1203 [2022-12-14 14:20:59,192 INFO L226 Difference]: Without dead ends: 1201 [2022-12-14 14:20:59,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:20:59,193 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 157 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:20:59,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1470 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:20:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-12-14 14:20:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 915. [2022-12-14 14:20:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 669 states have (on average 1.3064275037369208) internal successors, (874), 675 states have internal predecessors, (874), 163 states have call successors, (163), 82 states have call predecessors, (163), 82 states have return successors, (163), 157 states have call predecessors, (163), 163 states have call successors, (163) [2022-12-14 14:20:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1200 transitions. [2022-12-14 14:20:59,375 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1200 transitions. Word has length 80 [2022-12-14 14:20:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:20:59,376 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1200 transitions. [2022-12-14 14:20:59,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 14:20:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1200 transitions. [2022-12-14 14:20:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 14:20:59,377 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:20:59,377 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, 1, 1, 1, 1, 1] [2022-12-14 14:20:59,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 14:20:59,377 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:20:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:20:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash 146318770, now seen corresponding path program 1 times [2022-12-14 14:20:59,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:20:59,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700909039] [2022-12-14 14:20:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:20:59,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:20:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:20:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 14:20:59,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:20:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700909039] [2022-12-14 14:20:59,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700909039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:20:59,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:20:59,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:20:59,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749583120] [2022-12-14 14:20:59,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:20:59,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:20:59,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:20:59,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:20:59,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:20:59,492 INFO L87 Difference]: Start difference. First operand 915 states and 1200 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-12-14 14:20:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:20:59,687 INFO L93 Difference]: Finished difference Result 1568 states and 2072 transitions. [2022-12-14 14:20:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:20:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 83 [2022-12-14 14:20:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:20:59,690 INFO L225 Difference]: With dead ends: 1568 [2022-12-14 14:20:59,690 INFO L226 Difference]: Without dead ends: 903 [2022-12-14 14:20:59,691 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 [2022-12-14 14:20:59,691 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 7 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 595 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 [2022-12-14 14:20:59,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 595 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:20:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-12-14 14:20:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 903. [2022-12-14 14:20:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 663 states have (on average 1.2820512820512822) internal successors, (850), 669 states have internal predecessors, (850), 157 states have call successors, (157), 82 states have call predecessors, (157), 82 states have return successors, (157), 151 states have call predecessors, (157), 157 states have call successors, (157) [2022-12-14 14:20:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1164 transitions. [2022-12-14 14:20:59,872 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1164 transitions. Word has length 83 [2022-12-14 14:20:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:20:59,872 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1164 transitions. [2022-12-14 14:20:59,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-12-14 14:20:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1164 transitions. [2022-12-14 14:20:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 14:20:59,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:20:59,874 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, 1, 1, 1] [2022-12-14 14:20:59,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 14:20:59,875 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:20:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:20:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash 571782379, now seen corresponding path program 1 times [2022-12-14 14:20:59,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:20:59,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76332456] [2022-12-14 14:20:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:20:59,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:20:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:21:00,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76332456] [2022-12-14 14:21:00,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76332456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:21:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428715982] [2022-12-14 14:21:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:00,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:21:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:21:00,136 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:21:00,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:21:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:00,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:21:00,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:21:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:21:00,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:21:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:21:00,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428715982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:21:00,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1367120849] [2022-12-14 14:21:00,390 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 14:21:00,390 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:21:00,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:21:00,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:21:00,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:21:03,693 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 14:21:03,714 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 14:21:03,730 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 14:21:03,814 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 152 for LOIs [2022-12-14 14:21:03,858 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 14:21:03,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:21:32,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1367120849] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:32,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:21:32,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-12-14 14:21:32,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247309324] [2022-12-14 14:21:32,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:32,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 14:21:32,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:32,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 14:21:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 14:21:32,094 INFO L87 Difference]: Start difference. First operand 903 states and 1164 transitions. Second operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 14:21:40,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:40,008 INFO L93 Difference]: Finished difference Result 1517 states and 1987 transitions. [2022-12-14 14:21:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 14:21:40,009 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 85 [2022-12-14 14:21:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:40,011 INFO L225 Difference]: With dead ends: 1517 [2022-12-14 14:21:40,011 INFO L226 Difference]: Without dead ends: 945 [2022-12-14 14:21:40,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 14:21:40,013 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 138 mSDsluCounter, 4168 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 4441 SdHoareTripleChecker+Invalid, 3641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:40,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 4441 Invalid, 3641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-12-14 14:21:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-12-14 14:21:40,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 906. [2022-12-14 14:21:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 665 states have (on average 1.281203007518797) internal successors, (852), 671 states have internal predecessors, (852), 158 states have call successors, (158), 82 states have call predecessors, (158), 82 states have return successors, (158), 152 states have call predecessors, (158), 158 states have call successors, (158) [2022-12-14 14:21:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1168 transitions. [2022-12-14 14:21:40,183 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1168 transitions. Word has length 85 [2022-12-14 14:21:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:40,184 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1168 transitions. [2022-12-14 14:21:40,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 14:21:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1168 transitions. [2022-12-14 14:21:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 14:21:40,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:40,185 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, 1, 1, 1, 1, 1] [2022-12-14 14:21:40,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 14:21:40,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 14:21:40,386 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:40,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash -405377104, now seen corresponding path program 1 times [2022-12-14 14:21:40,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:40,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145131569] [2022-12-14 14:21:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:21:40,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:40,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145131569] [2022-12-14 14:21:40,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145131569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:21:40,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345677559] [2022-12-14 14:21:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:40,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:21:40,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:21:40,766 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:21:40,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:21:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:40,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 14:21:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:21:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 14:21:41,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:21:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 14:21:41,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345677559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:21:41,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662980180] [2022-12-14 14:21:41,174 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 14:21:41,174 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:21:41,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:21:41,174 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:21:41,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:21:44,766 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 241 for LOIs [2022-12-14 14:21:44,965 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 14:21:44,982 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-12-14 14:21:45,070 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 157 for LOIs [2022-12-14 14:21:45,104 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-12-14 14:21:45,148 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 14:21:45,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:22:24,480 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41609#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (<= 0 ~manual_selection_History_2~0) (= ~side2_written~0 0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 14:22:24,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:22:24,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:22:24,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2022-12-14 14:22:24,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090275121] [2022-12-14 14:22:24,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:22:24,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 14:22:24,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:22:24,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 14:22:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=3893, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 14:22:24,482 INFO L87 Difference]: Start difference. First operand 906 states and 1168 transitions. Second operand has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 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) [2022-12-14 14:22:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:22:25,609 INFO L93 Difference]: Finished difference Result 2117 states and 2893 transitions. [2022-12-14 14:22:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 14:22:25,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 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 85 [2022-12-14 14:22:25,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:22:25,613 INFO L225 Difference]: With dead ends: 2117 [2022-12-14 14:22:25,613 INFO L226 Difference]: Without dead ends: 1389 [2022-12-14 14:22:25,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 187 SyntacticMatches, 15 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 14:22:25,615 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 278 mSDsluCounter, 4692 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 5041 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:22:25,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 5041 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:22:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-12-14 14:22:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 885. [2022-12-14 14:22:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 650 states have (on average 1.2738461538461539) internal successors, (828), 656 states have internal predecessors, (828), 152 states have call successors, (152), 82 states have call predecessors, (152), 82 states have return successors, (152), 146 states have call predecessors, (152), 152 states have call successors, (152) [2022-12-14 14:22:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1132 transitions. [2022-12-14 14:22:25,795 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1132 transitions. Word has length 85 [2022-12-14 14:22:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:22:25,795 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1132 transitions. [2022-12-14 14:22:25,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 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) [2022-12-14 14:22:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1132 transitions. [2022-12-14 14:22:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 14:22:25,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:22:25,796 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, 1, 1, 1, 1, 1] [2022-12-14 14:22:25,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 14:22:25,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:25,998 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:22:25,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:22:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1347774391, now seen corresponding path program 1 times [2022-12-14 14:22:25,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:22:25,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421794233] [2022-12-14 14:22:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:26,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:22:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:22:26,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:22:26,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421794233] [2022-12-14 14:22:26,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421794233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:22:26,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085494952] [2022-12-14 14:22:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:26,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:26,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:22:26,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:22:26,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:22:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:26,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:22:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:22:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:22:26,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:22:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:22:26,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085494952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:22:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809298915] [2022-12-14 14:22:26,469 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 14:22:26,469 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:22:26,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:22:26,470 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:22:26,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:22:29,397 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 14:22:29,419 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 14:22:29,435 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-12-14 14:22:29,502 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 14:22:29,545 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 14:22:29,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:23:00,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [809298915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:23:00,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:23:00,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-12-14 14:23:00,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324002305] [2022-12-14 14:23:00,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:23:00,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 14:23:00,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:23:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 14:23:00,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2722, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 14:23:00,111 INFO L87 Difference]: Start difference. First operand 885 states and 1132 transitions. Second operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 14:23:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:23:08,810 INFO L93 Difference]: Finished difference Result 1481 states and 1928 transitions. [2022-12-14 14:23:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 14:23:08,810 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 87 [2022-12-14 14:23:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:23:08,813 INFO L225 Difference]: With dead ends: 1481 [2022-12-14 14:23:08,813 INFO L226 Difference]: Without dead ends: 920 [2022-12-14 14:23:08,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 203 SyntacticMatches, 14 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=265, Invalid=2927, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 14:23:08,814 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 174 mSDsluCounter, 4766 mSDsCounter, 0 mSdLazyCounter, 4000 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 5042 SdHoareTripleChecker+Invalid, 4050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:23:08,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 5042 Invalid, 4050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4000 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-12-14 14:23:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-12-14 14:23:08,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 888. [2022-12-14 14:23:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 652 states have (on average 1.2730061349693251) internal successors, (830), 658 states have internal predecessors, (830), 153 states have call successors, (153), 82 states have call predecessors, (153), 82 states have return successors, (153), 147 states have call predecessors, (153), 153 states have call successors, (153) [2022-12-14 14:23:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1136 transitions. [2022-12-14 14:23:08,992 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1136 transitions. Word has length 87 [2022-12-14 14:23:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:23:08,992 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1136 transitions. [2022-12-14 14:23:08,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 14:23:08,992 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1136 transitions. [2022-12-14 14:23:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 14:23:08,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:23:08,993 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] [2022-12-14 14:23:08,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 14:23:09,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:23:09,194 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:23:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:23:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1650904977, now seen corresponding path program 1 times [2022-12-14 14:23:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:23:09,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253692634] [2022-12-14 14:23:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:23:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:23:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:23:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:23:09,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:23:09,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253692634] [2022-12-14 14:23:09,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253692634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:23:09,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990345479] [2022-12-14 14:23:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:23:09,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:23:09,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:23:09,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:23:09,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 14:23:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:23:09,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:23:09,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:23:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:23:09,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:23:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:23:09,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990345479] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:23:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251573979] [2022-12-14 14:23:09,604 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 14:23:09,605 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:23:09,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:23:09,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:23:09,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:23:12,688 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 14:23:12,709 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 14:23:12,725 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 14:23:12,810 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-12-14 14:23:13,156 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 14:23:13,199 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:23:48,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1251573979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:23:48,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:23:48,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 14:23:48,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601473283] [2022-12-14 14:23:48,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:23:48,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 14:23:48,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:23:48,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 14:23:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 14:23:48,429 INFO L87 Difference]: Start difference. First operand 888 states and 1136 transitions. Second operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 14:23:56,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:23:56,418 INFO L93 Difference]: Finished difference Result 1471 states and 1911 transitions. [2022-12-14 14:23:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 14:23:56,419 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 92 [2022-12-14 14:23:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:23:56,421 INFO L225 Difference]: With dead ends: 1471 [2022-12-14 14:23:56,421 INFO L226 Difference]: Without dead ends: 910 [2022-12-14 14:23:56,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 14:23:56,423 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 67 mSDsluCounter, 3999 mSDsCounter, 0 mSdLazyCounter, 3665 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 4236 SdHoareTripleChecker+Invalid, 3675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:23:56,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 4236 Invalid, 3675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3665 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-14 14:23:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-12-14 14:23:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 875. [2022-12-14 14:23:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 643 states have (on average 1.270606531881804) internal successors, (817), 649 states have internal predecessors, (817), 149 states have call successors, (149), 82 states have call predecessors, (149), 82 states have return successors, (149), 143 states have call predecessors, (149), 149 states have call successors, (149) [2022-12-14 14:23:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1115 transitions. [2022-12-14 14:23:56,602 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1115 transitions. Word has length 92 [2022-12-14 14:23:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:23:56,603 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 1115 transitions. [2022-12-14 14:23:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 14:23:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1115 transitions. [2022-12-14 14:23:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 14:23:56,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:23:56,604 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, 1, 1, 1, 1, 1] [2022-12-14 14:23:56,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 14:23:56,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:23:56,804 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:23:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:23:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1177367930, now seen corresponding path program 1 times [2022-12-14 14:23:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:23:56,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295163287] [2022-12-14 14:23:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:23:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:23:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:23:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 14:23:56,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:23:56,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295163287] [2022-12-14 14:23:56,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295163287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:23:56,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:23:56,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:23:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673973387] [2022-12-14 14:23:56,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:23:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:23:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:23:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:23:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:23:56,903 INFO L87 Difference]: Start difference. First operand 875 states and 1115 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, (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) [2022-12-14 14:23:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:23:57,133 INFO L93 Difference]: Finished difference Result 1489 states and 1921 transitions. [2022-12-14 14:23:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:23:57,134 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, (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 92 [2022-12-14 14:23:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:23:57,136 INFO L225 Difference]: With dead ends: 1489 [2022-12-14 14:23:57,136 INFO L226 Difference]: Without dead ends: 863 [2022-12-14 14:23:57,137 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 [2022-12-14 14:23:57,137 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 7 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:23:57,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 577 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:23:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-12-14 14:23:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-12-14 14:23:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 637 states have (on average 1.2448979591836735) internal successors, (793), 643 states have internal predecessors, (793), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-12-14 14:23:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1079 transitions. [2022-12-14 14:23:57,317 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1079 transitions. Word has length 92 [2022-12-14 14:23:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:23:57,317 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1079 transitions. [2022-12-14 14:23:57,317 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, (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) [2022-12-14 14:23:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1079 transitions. [2022-12-14 14:23:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 14:23:57,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:23:57,319 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, 1] [2022-12-14 14:23:57,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 14:23:57,319 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:23:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:23:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1073479715, now seen corresponding path program 1 times [2022-12-14 14:23:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:23:57,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063949066] [2022-12-14 14:23:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:23:57,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:23:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:23:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:23:57,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:23:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063949066] [2022-12-14 14:23:57,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063949066] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:23:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460084709] [2022-12-14 14:23:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:23:57,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:23:57,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:23:57,493 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:23:57,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 14:23:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:23:57,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:23:57,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:23:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:23:57,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:23:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:23:57,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460084709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:23:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116267375] [2022-12-14 14:23:57,734 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-12-14 14:23:57,735 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:23:57,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:23:57,735 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:23:57,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:24:00,632 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 14:24:00,653 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 14:24:00,669 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-12-14 14:24:01,002 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 193 for LOIs [2022-12-14 14:24:01,341 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 14:24:01,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:24:36,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1116267375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:24:36,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:24:36,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 14:24:36,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138819921] [2022-12-14 14:24:36,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:24:36,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 14:24:36,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:24:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 14:24:36,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 14:24:36,913 INFO L87 Difference]: Start difference. First operand 863 states and 1079 transitions. Second operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 14:24:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:24:46,150 INFO L93 Difference]: Finished difference Result 1451 states and 1851 transitions. [2022-12-14 14:24:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 14:24:46,151 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 94 [2022-12-14 14:24:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:24:46,153 INFO L225 Difference]: With dead ends: 1451 [2022-12-14 14:24:46,153 INFO L226 Difference]: Without dead ends: 895 [2022-12-14 14:24:46,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 225 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 14:24:46,155 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 236 mSDsluCounter, 5117 mSDsCounter, 0 mSdLazyCounter, 4281 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 5394 SdHoareTripleChecker+Invalid, 4354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 4281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:24:46,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 5394 Invalid, 4354 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [73 Valid, 4281 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-12-14 14:24:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-12-14 14:24:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 863. [2022-12-14 14:24:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 637 states have (on average 1.2433281004709575) internal successors, (792), 643 states have internal predecessors, (792), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-12-14 14:24:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1078 transitions. [2022-12-14 14:24:46,334 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1078 transitions. Word has length 94 [2022-12-14 14:24:46,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:24:46,334 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1078 transitions. [2022-12-14 14:24:46,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 14:24:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1078 transitions. [2022-12-14 14:24:46,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 14:24:46,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:24:46,335 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, 1, 1, 1, 1, 1] [2022-12-14 14:24:46,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 14:24:46,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 14:24:46,537 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:24:46,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:24:46,538 INFO L85 PathProgramCache]: Analyzing trace with hash 181114096, now seen corresponding path program 1 times [2022-12-14 14:24:46,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:24:46,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452493400] [2022-12-14 14:24:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:24:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:24:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:24:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:24:46,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:24:46,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452493400] [2022-12-14 14:24:46,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452493400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:24:46,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406686774] [2022-12-14 14:24:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:24:46,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:24:46,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:24:46,749 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:24:46,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 14:24:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:24:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:24:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:24:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:24:46,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:24:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:24:47,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406686774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:24:47,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546152087] [2022-12-14 14:24:47,032 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-12-14 14:24:47,032 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:24:47,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:24:47,033 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:24:47,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:24:50,637 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 14:24:50,658 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 14:24:50,680 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-12-14 14:24:50,747 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-12-14 14:24:51,087 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 14:24:51,128 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:25:27,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [546152087] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:25:27,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:25:27,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2022-12-14 14:25:27,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697232461] [2022-12-14 14:25:27,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:25:27,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 14:25:27,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:25:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 14:25:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 14:25:27,962 INFO L87 Difference]: Start difference. First operand 863 states and 1078 transitions. Second operand has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 14:25:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:25:37,159 INFO L93 Difference]: Finished difference Result 1438 states and 1829 transitions. [2022-12-14 14:25:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 14:25:37,160 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 98 [2022-12-14 14:25:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:25:37,162 INFO L225 Difference]: With dead ends: 1438 [2022-12-14 14:25:37,162 INFO L226 Difference]: Without dead ends: 885 [2022-12-14 14:25:37,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 14:25:37,163 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 140 mSDsluCounter, 4774 mSDsCounter, 0 mSdLazyCounter, 4198 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 5036 SdHoareTripleChecker+Invalid, 4241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:25:37,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 5036 Invalid, 4241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 4198 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-12-14 14:25:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-12-14 14:25:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 850. [2022-12-14 14:25:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 628 states have (on average 1.2404458598726114) internal successors, (779), 634 states have internal predecessors, (779), 139 states have call successors, (139), 82 states have call predecessors, (139), 82 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2022-12-14 14:25:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1057 transitions. [2022-12-14 14:25:37,344 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1057 transitions. Word has length 98 [2022-12-14 14:25:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:25:37,344 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1057 transitions. [2022-12-14 14:25:37,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 14:25:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1057 transitions. [2022-12-14 14:25:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 14:25:37,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:25:37,345 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, 1, 1, 1, 1, 1] [2022-12-14 14:25:37,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 14:25:37,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 14:25:37,547 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:25:37,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:25:37,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1013565637, now seen corresponding path program 1 times [2022-12-14 14:25:37,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:25:37,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284599704] [2022-12-14 14:25:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:25:37,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:25:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:25:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 14:25:37,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:25:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284599704] [2022-12-14 14:25:37,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284599704] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:25:37,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:25:37,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:25:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096173175] [2022-12-14 14:25:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:25:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:25:37,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:25:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:25:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:25:37,671 INFO L87 Difference]: Start difference. First operand 850 states and 1057 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-12-14 14:25:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:25:37,880 INFO L93 Difference]: Finished difference Result 1404 states and 1776 transitions. [2022-12-14 14:25:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:25:37,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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 108 [2022-12-14 14:25:37,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:25:37,882 INFO L225 Difference]: With dead ends: 1404 [2022-12-14 14:25:37,882 INFO L226 Difference]: Without dead ends: 838 [2022-12-14 14:25:37,883 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 [2022-12-14 14:25:37,883 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 7 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:25:37,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 565 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:25:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-12-14 14:25:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 788. [2022-12-14 14:25:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 586 states have (on average 1.2064846416382253) internal successors, (707), 592 states have internal predecessors, (707), 125 states have call successors, (125), 76 states have call predecessors, (125), 76 states have return successors, (125), 119 states have call predecessors, (125), 125 states have call successors, (125) [2022-12-14 14:25:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 957 transitions. [2022-12-14 14:25:38,051 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 957 transitions. Word has length 108 [2022-12-14 14:25:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:25:38,052 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 957 transitions. [2022-12-14 14:25:38,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-12-14 14:25:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 957 transitions. [2022-12-14 14:25:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 14:25:38,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:25:38,053 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, 1, 1, 1, 1, 1] [2022-12-14 14:25:38,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 14:25:38,053 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:25:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:25:38,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1777222196, now seen corresponding path program 1 times [2022-12-14 14:25:38,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:25:38,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780873019] [2022-12-14 14:25:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:25:38,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:25:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:25:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 14:25:38,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:25:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780873019] [2022-12-14 14:25:38,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780873019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:25:38,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:25:38,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:25:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965819577] [2022-12-14 14:25:38,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:25:38,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:25:38,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:25:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:25:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:25:38,143 INFO L87 Difference]: Start difference. First operand 788 states and 957 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-12-14 14:25:38,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:25:38,338 INFO L93 Difference]: Finished difference Result 1247 states and 1547 transitions. [2022-12-14 14:25:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:25:38,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 124 [2022-12-14 14:25:38,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:25:38,341 INFO L225 Difference]: With dead ends: 1247 [2022-12-14 14:25:38,341 INFO L226 Difference]: Without dead ends: 776 [2022-12-14 14:25:38,342 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 [2022-12-14 14:25:38,342 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 6 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:25:38,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 556 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:25:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-12-14 14:25:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 752. [2022-12-14 14:25:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 560 states have (on average 1.1839285714285714) internal successors, (663), 566 states have internal predecessors, (663), 118 states have call successors, (118), 73 states have call predecessors, (118), 73 states have return successors, (118), 112 states have call predecessors, (118), 118 states have call successors, (118) [2022-12-14 14:25:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 899 transitions. [2022-12-14 14:25:38,507 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 899 transitions. Word has length 124 [2022-12-14 14:25:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:25:38,508 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 899 transitions. [2022-12-14 14:25:38,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-12-14 14:25:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 899 transitions. [2022-12-14 14:25:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 14:25:38,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:25:38,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:25:38,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 14:25:38,509 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:25:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:25:38,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1204661699, now seen corresponding path program 1 times [2022-12-14 14:25:38,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:25:38,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947889854] [2022-12-14 14:25:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:25:38,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:25:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:25:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 14:25:38,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:25:38,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947889854] [2022-12-14 14:25:38,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947889854] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:25:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928870904] [2022-12-14 14:25:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:25:38,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:25:38,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:25:38,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:25:38,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 14:25:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:25:38,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:25:38,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:25:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 14:25:38,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:25:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 14:25:38,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928870904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:25:38,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487620242] [2022-12-14 14:25:38,990 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-12-14 14:25:38,990 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:25:38,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:25:38,991 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:25:38,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:25:45,737 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-12-14 14:25:45,841 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 14:25:45,858 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 14:25:45,947 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-12-14 14:25:45,980 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-12-14 14:25:46,378 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 194 for LOIs [2022-12-14 14:25:46,792 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:26:31,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69562#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 14:26:31,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:26:31,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:26:31,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-12-14 14:26:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291027439] [2022-12-14 14:26:31,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:26:31,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 14:26:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:26:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 14:26:31,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 14:26:31,472 INFO L87 Difference]: Start difference. First operand 752 states and 899 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 14:26:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:26:32,401 INFO L93 Difference]: Finished difference Result 1990 states and 2523 transitions. [2022-12-14 14:26:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 14:26:32,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) Word has length 134 [2022-12-14 14:26:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:26:32,405 INFO L225 Difference]: With dead ends: 1990 [2022-12-14 14:26:32,405 INFO L226 Difference]: Without dead ends: 1405 [2022-12-14 14:26:32,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 14:26:32,407 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 512 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:26:32,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1998 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:26:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-12-14 14:26:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1055. [2022-12-14 14:26:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 782 states have (on average 1.1777493606138107) internal successors, (921), 791 states have internal predecessors, (921), 166 states have call successors, (166), 106 states have call predecessors, (166), 106 states have return successors, (166), 157 states have call predecessors, (166), 166 states have call successors, (166) [2022-12-14 14:26:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1253 transitions. [2022-12-14 14:26:32,643 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1253 transitions. Word has length 134 [2022-12-14 14:26:32,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:26:32,643 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1253 transitions. [2022-12-14 14:26:32,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 14:26:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1253 transitions. [2022-12-14 14:26:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 14:26:32,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:26:32,645 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:26:32,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 14:26:32,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:26:32,846 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:26:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:26:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1365408653, now seen corresponding path program 1 times [2022-12-14 14:26:32,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:26:32,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032350640] [2022-12-14 14:26:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:26:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:26:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:26:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 14:26:34,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:26:34,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032350640] [2022-12-14 14:26:34,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032350640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:26:34,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800876617] [2022-12-14 14:26:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:26:34,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:26:34,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:26:34,987 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:26:34,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 14:26:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:26:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 14:26:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:26:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 14:26:35,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:26:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 14:26:36,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800876617] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:26:36,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183275212] [2022-12-14 14:26:36,281 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-12-14 14:26:36,281 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:26:36,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:26:36,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:26:36,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:26:44,399 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 92 for LOIs [2022-12-14 14:26:44,496 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 14:26:44,522 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 14:26:44,643 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 152 for LOIs [2022-12-14 14:26:44,700 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 123 for LOIs [2022-12-14 14:26:44,886 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 197 for LOIs [2022-12-14 14:26:45,485 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:27:45,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74485#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 14:27:45,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:27:45,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:27:45,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-12-14 14:27:45,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266195870] [2022-12-14 14:27:45,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:27:45,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 14:27:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:27:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 14:27:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 14:27:45,041 INFO L87 Difference]: Start difference. First operand 1055 states and 1253 transitions. Second operand has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-12-14 14:27:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:27:50,898 INFO L93 Difference]: Finished difference Result 2584 states and 3365 transitions. [2022-12-14 14:27:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 14:27:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) Word has length 142 [2022-12-14 14:27:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:27:50,905 INFO L225 Difference]: With dead ends: 2584 [2022-12-14 14:27:50,906 INFO L226 Difference]: Without dead ends: 1738 [2022-12-14 14:27:50,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 330 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=2492, Invalid=16414, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 14:27:50,908 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 841 mSDsluCounter, 12269 mSDsCounter, 0 mSdLazyCounter, 5528 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 12702 SdHoareTripleChecker+Invalid, 5730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 5528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:27:50,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 12702 Invalid, 5730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 5528 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 14:27:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2022-12-14 14:27:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 983. [2022-12-14 14:27:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 734 states have (on average 1.1961852861035422) internal successors, (878), 745 states have internal predecessors, (878), 151 states have call successors, (151), 97 states have call predecessors, (151), 97 states have return successors, (151), 140 states have call predecessors, (151), 151 states have call successors, (151) [2022-12-14 14:27:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1180 transitions. [2022-12-14 14:27:51,138 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1180 transitions. Word has length 142 [2022-12-14 14:27:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:27:51,138 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1180 transitions. [2022-12-14 14:27:51,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-12-14 14:27:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1180 transitions. [2022-12-14 14:27:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:27:51,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:27:51,139 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:27:51,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 14:27:51,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:27:51,341 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:27:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:27:51,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1229736452, now seen corresponding path program 1 times [2022-12-14 14:27:51,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:27:51,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896390194] [2022-12-14 14:27:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:27:51,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:27:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:27:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 14:27:51,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:27:51,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896390194] [2022-12-14 14:27:51,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896390194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:27:51,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296911708] [2022-12-14 14:27:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:27:51,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:27:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:27:51,884 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:27:51,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 14:27:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:27:51,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 14:27:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:27:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 67 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 14:27:52,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:27:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 14:27:52,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296911708] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:27:52,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741734351] [2022-12-14 14:27:52,858 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2022-12-14 14:27:52,858 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:27:52,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:27:52,858 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:27:52,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:28:13,383 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 130 for LOIs [2022-12-14 14:28:13,569 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2022-12-14 14:28:13,575 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 116 for LOIs [2022-12-14 14:28:13,649 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 104 for LOIs [2022-12-14 14:28:13,734 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 119 for LOIs [2022-12-14 14:28:13,788 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 86 for LOIs [2022-12-14 14:28:13,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:28:38,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '80178#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= ~active_side_History_0~0 127) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (not (= 2 ~active_side_History_0~0)) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= ~side1_written~0 1) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 14:28:38,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:28:38,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:28:38,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-12-14 14:28:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328621254] [2022-12-14 14:28:38,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:28:38,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 14:28:38,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 14:28:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=7694, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 14:28:38,925 INFO L87 Difference]: Start difference. First operand 983 states and 1180 transitions. Second operand has 25 states, 25 states have (on average 7.76) internal successors, (194), 25 states have internal predecessors, (194), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 14:28:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:46,609 INFO L93 Difference]: Finished difference Result 3876 states and 5308 transitions. [2022-12-14 14:28:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-14 14:28:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.76) internal successors, (194), 25 states have internal predecessors, (194), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) Word has length 144 [2022-12-14 14:28:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:46,621 INFO L225 Difference]: With dead ends: 3876 [2022-12-14 14:28:46,621 INFO L226 Difference]: Without dead ends: 3138 [2022-12-14 14:28:46,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 350 SyntacticMatches, 7 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12750 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=2995, Invalid=28511, Unknown=0, NotChecked=0, Total=31506 [2022-12-14 14:28:46,624 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 3634 mSDsluCounter, 2426 mSDsCounter, 0 mSdLazyCounter, 3321 mSolverCounterSat, 1109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3634 SdHoareTripleChecker+Valid, 2769 SdHoareTripleChecker+Invalid, 4430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1109 IncrementalHoareTripleChecker+Valid, 3321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:46,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3634 Valid, 2769 Invalid, 4430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1109 Valid, 3321 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 14:28:46,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2022-12-14 14:28:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1514. [2022-12-14 14:28:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1128 states have (on average 1.195921985815603) internal successors, (1349), 1139 states have internal predecessors, (1349), 233 states have call successors, (233), 152 states have call predecessors, (233), 152 states have return successors, (233), 222 states have call predecessors, (233), 233 states have call successors, (233) [2022-12-14 14:28:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1815 transitions. [2022-12-14 14:28:47,011 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1815 transitions. Word has length 144 [2022-12-14 14:28:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:47,011 INFO L495 AbstractCegarLoop]: Abstraction has 1514 states and 1815 transitions. [2022-12-14 14:28:47,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.76) internal successors, (194), 25 states have internal predecessors, (194), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 14:28:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1815 transitions. [2022-12-14 14:28:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 14:28:47,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:47,013 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, 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] [2022-12-14 14:28:47,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 14:28:47,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 14:28:47,213 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:47,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1414939676, now seen corresponding path program 1 times [2022-12-14 14:28:47,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:47,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471900699] [2022-12-14 14:28:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:47,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 14:28:47,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:47,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471900699] [2022-12-14 14:28:47,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471900699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:28:47,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:28:47,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 14:28:47,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276143829] [2022-12-14 14:28:47,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:28:47,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:28:47,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:47,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:28:47,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:28:47,316 INFO L87 Difference]: Start difference. First operand 1514 states and 1815 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 14:28:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:48,852 INFO L93 Difference]: Finished difference Result 5036 states and 6467 transitions. [2022-12-14 14:28:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:28:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2022-12-14 14:28:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:48,861 INFO L225 Difference]: With dead ends: 5036 [2022-12-14 14:28:48,862 INFO L226 Difference]: Without dead ends: 3750 [2022-12-14 14:28:48,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:28:48,863 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 516 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:48,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1804 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:28:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-12-14 14:28:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 2594. [2022-12-14 14:28:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 1912 states have (on average 1.1950836820083681) internal successors, (2285), 1933 states have internal predecessors, (2285), 419 states have call successors, (419), 262 states have call predecessors, (419), 262 states have return successors, (419), 398 states have call predecessors, (419), 419 states have call successors, (419) [2022-12-14 14:28:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3123 transitions. [2022-12-14 14:28:49,495 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3123 transitions. Word has length 145 [2022-12-14 14:28:49,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:49,495 INFO L495 AbstractCegarLoop]: Abstraction has 2594 states and 3123 transitions. [2022-12-14 14:28:49,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 14:28:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3123 transitions. [2022-12-14 14:28:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 14:28:49,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:49,498 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, 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] [2022-12-14 14:28:49,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 14:28:49,498 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:49,498 INFO L85 PathProgramCache]: Analyzing trace with hash -285730207, now seen corresponding path program 1 times [2022-12-14 14:28:49,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:49,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17354105] [2022-12-14 14:28:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 14:28:49,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:49,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17354105] [2022-12-14 14:28:49,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17354105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:49,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796331044] [2022-12-14 14:28:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:49,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:49,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:49,895 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:49,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 14:28:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:50,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 14:28:50,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 59 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 14:28:50,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:28:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 14:28:50,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796331044] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:28:50,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [905018328] [2022-12-14 14:28:50,637 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-12-14 14:28:50,637 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:28:50,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:28:50,638 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:28:50,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:29:01,099 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 93 for LOIs [2022-12-14 14:29:01,174 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2022-12-14 14:29:01,180 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-12-14 14:29:01,272 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 156 for LOIs [2022-12-14 14:29:01,315 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-12-14 14:29:01,361 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 14:29:01,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:29:55,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [905018328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:29:55,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:29:55,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [8, 12, 9] total 72 [2022-12-14 14:29:55,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271894535] [2022-12-14 14:29:55,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:29:55,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 14:29:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:29:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 14:29:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=4408, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 14:29:55,688 INFO L87 Difference]: Start difference. First operand 2594 states and 3123 transitions. Second operand has 51 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 35 states have internal predecessors, (65), 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) [2022-12-14 14:30:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:30:08,156 INFO L93 Difference]: Finished difference Result 5147 states and 6256 transitions. [2022-12-14 14:30:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 14:30:08,157 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 35 states have internal predecessors, (65), 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 147 [2022-12-14 14:30:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:30:08,162 INFO L225 Difference]: With dead ends: 5147 [2022-12-14 14:30:08,163 INFO L226 Difference]: Without dead ends: 2781 [2022-12-14 14:30:08,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 356 SyntacticMatches, 22 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=747, Invalid=4953, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 14:30:08,165 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 138 mSDsluCounter, 3856 mSDsCounter, 0 mSdLazyCounter, 4466 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 4098 SdHoareTripleChecker+Invalid, 4505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:30:08,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 4098 Invalid, 4505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 4466 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-12-14 14:30:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2022-12-14 14:30:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2765. [2022-12-14 14:30:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2034 states have (on average 1.1951819075712882) internal successors, (2431), 2058 states have internal predecessors, (2431), 455 states have call successors, (455), 275 states have call predecessors, (455), 275 states have return successors, (455), 431 states have call predecessors, (455), 455 states have call successors, (455) [2022-12-14 14:30:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 3341 transitions. [2022-12-14 14:30:08,867 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 3341 transitions. Word has length 147 [2022-12-14 14:30:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:30:08,867 INFO L495 AbstractCegarLoop]: Abstraction has 2765 states and 3341 transitions. [2022-12-14 14:30:08,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 35 states have internal predecessors, (65), 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) [2022-12-14 14:30:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 3341 transitions. [2022-12-14 14:30:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 14:30:08,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:30:08,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:30:08,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 14:30:09,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 14:30:09,070 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:30:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:30:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1854711957, now seen corresponding path program 1 times [2022-12-14 14:30:09,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:30:09,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171499076] [2022-12-14 14:30:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:30:09,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:30:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:30:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 14:30:09,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:30:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171499076] [2022-12-14 14:30:09,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171499076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:30:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729949084] [2022-12-14 14:30:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:30:09,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:30:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:30:09,234 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:30:09,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 14:30:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:30:09,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 14:30:09,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:30:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 14:30:09,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:30:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 14:30:10,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729949084] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:30:10,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2134892298] [2022-12-14 14:30:10,025 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-12-14 14:30:10,025 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:30:10,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:30:10,026 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:30:10,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:30:30,424 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 83 for LOIs [2022-12-14 14:30:30,478 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 144 for LOIs [2022-12-14 14:30:30,494 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-12-14 14:30:30,552 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 113 for LOIs [2022-12-14 14:30:30,603 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 120 for LOIs [2022-12-14 14:30:30,653 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 85 for LOIs [2022-12-14 14:30:30,677 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:31:02,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '109509#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (<= 0 ~cs1~0) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= |#NULL.offset| 0) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (<= ~cs1~0 0) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 |#NULL.offset|) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 14:31:02,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:31:02,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:31:02,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 9] total 24 [2022-12-14 14:31:02,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608891858] [2022-12-14 14:31:02,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:31:02,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 14:31:02,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 14:31:02,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=8444, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 14:31:02,847 INFO L87 Difference]: Start difference. First operand 2765 states and 3341 transitions. Second operand has 24 states, 24 states have (on average 9.0) internal successors, (216), 24 states have internal predecessors, (216), 9 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) [2022-12-14 14:31:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:24,970 INFO L93 Difference]: Finished difference Result 12151 states and 16392 transitions. [2022-12-14 14:31:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-12-14 14:31:24,971 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.0) internal successors, (216), 24 states have internal predecessors, (216), 9 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) Word has length 149 [2022-12-14 14:31:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:24,990 INFO L225 Difference]: With dead ends: 12151 [2022-12-14 14:31:24,990 INFO L226 Difference]: Without dead ends: 9785 [2022-12-14 14:31:24,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 372 SyntacticMatches, 10 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30522 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=5415, Invalid=65607, Unknown=0, NotChecked=0, Total=71022 [2022-12-14 14:31:24,997 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 4627 mSDsluCounter, 3577 mSDsCounter, 0 mSdLazyCounter, 6509 mSolverCounterSat, 3461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 4035 SdHoareTripleChecker+Invalid, 9970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3461 IncrementalHoareTripleChecker+Valid, 6509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:24,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4627 Valid, 4035 Invalid, 9970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3461 Valid, 6509 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-12-14 14:31:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2022-12-14 14:31:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 4433. [2022-12-14 14:31:26,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 3312 states have (on average 1.2083333333333333) internal successors, (4002), 3344 states have internal predecessors, (4002), 689 states have call successors, (689), 431 states have call predecessors, (689), 431 states have return successors, (689), 657 states have call predecessors, (689), 689 states have call successors, (689) [2022-12-14 14:31:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 5380 transitions. [2022-12-14 14:31:26,330 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 5380 transitions. Word has length 149 [2022-12-14 14:31:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:26,330 INFO L495 AbstractCegarLoop]: Abstraction has 4433 states and 5380 transitions. [2022-12-14 14:31:26,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.0) internal successors, (216), 24 states have internal predecessors, (216), 9 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) [2022-12-14 14:31:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 5380 transitions. [2022-12-14 14:31:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 14:31:26,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:26,333 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, 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] [2022-12-14 14:31:26,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 14:31:26,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 14:31:26,534 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:26,534 INFO L85 PathProgramCache]: Analyzing trace with hash -82863646, now seen corresponding path program 1 times [2022-12-14 14:31:26,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:26,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755493984] [2022-12-14 14:31:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:26,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 14:31:27,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:27,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755493984] [2022-12-14 14:31:27,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755493984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:31:27,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136283211] [2022-12-14 14:31:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:27,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:31:27,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:31:27,228 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:31:27,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedbab77-eb5a-4102-90ef-274b96875ae0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 14:31:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:27,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 14:31:27,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:31:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 14:31:28,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:31:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 14:31:28,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136283211] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:31:28,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277895630] [2022-12-14 14:31:28,935 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2022-12-14 14:31:28,935 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:31:28,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:31:28,935 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:31:28,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:31:52,179 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 131 for LOIs [2022-12-14 14:31:52,377 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 121 for LOIs [2022-12-14 14:31:52,389 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 117 for LOIs [2022-12-14 14:31:52,468 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 105 for LOIs [2022-12-14 14:31:52,555 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 121 for LOIs [2022-12-14 14:31:52,608 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 91 for LOIs [2022-12-14 14:31:52,628 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:32:26,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '132655#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= ~side1_written~0 0) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~active_side_History_0~0 2) (not (= 2 ~active_side_History_0~0)) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 14:32:26,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:32:26,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:32:26,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 35 [2022-12-14 14:32:26,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060098759] [2022-12-14 14:32:26,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:26,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 14:32:26,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:32:26,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 14:32:26,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=10071, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 14:32:26,821 INFO L87 Difference]: Start difference. First operand 4433 states and 5380 transitions. Second operand has 35 states, 35 states have (on average 6.314285714285714) internal successors, (221), 34 states have internal predecessors, (221), 12 states have call successors, (47), 7 states have call predecessors, (47), 9 states have return successors, (47), 12 states have call predecessors, (47), 11 states have call successors, (47)