./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW --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 5b06f43d0873a45269a4958da066d5bcb75939de6aa3fcbada350cd9dc55d93c --- 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-4e7fbc6 [2022-11-23 15:17:10,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:17:10,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:17:10,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:17:10,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:17:10,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:17:10,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:17:10,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:17:10,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:17:10,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:17:10,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:17:10,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:17:10,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:17:10,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:17:10,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:17:10,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:17:10,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:17:10,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:17:10,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:17:10,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:17:10,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:17:10,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:17:10,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:17:10,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:17:10,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:17:10,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:17:10,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:17:10,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:17:10,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:17:10,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:17:10,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:17:10,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:17:10,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:17:10,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:17:10,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:17:10,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:17:10,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:17:10,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:17:10,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:17:10,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:17:10,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:17:10,511 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:17:10,549 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:17:10,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:17:10,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:17:10,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:17:10,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:17:10,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:17:10,551 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:17:10,552 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:17:10,552 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:17:10,552 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:17:10,553 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:17:10,553 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:17:10,553 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:17:10,553 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:17:10,554 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:17:10,554 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:17:10,555 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:17:10,555 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:17:10,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:17:10,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:17:10,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:17:10,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:17:10,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:17:10,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:17:10,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:17:10,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:17:10,559 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:17:10,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:17:10,560 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:17:10,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:17:10,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:17:10,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:17:10,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:17:10,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:17:10,562 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:17:10,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:17:10,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:17:10,563 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:17:10,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:17:10,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:17:10,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:17:10,564 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_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b06f43d0873a45269a4958da066d5bcb75939de6aa3fcbada350cd9dc55d93c [2022-11-23 15:17:10,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:17:10,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:17:11,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:17:11,005 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:17:11,005 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:17:11,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c [2022-11-23 15:17:14,363 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:17:14,731 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:17:14,732 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c [2022-11-23 15:17:14,769 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/data/29bf04a8a/96974d5438634e0e97e4bb39ce81bd59/FLAGd5fc13fd8 [2022-11-23 15:17:14,795 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/data/29bf04a8a/96974d5438634e0e97e4bb39ce81bd59 [2022-11-23 15:17:14,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:17:14,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:17:14,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:17:14,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:17:14,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:17:14,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:17:14" (1/1) ... [2022-11-23 15:17:14,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433252a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:14, skipping insertion in model container [2022-11-23 15:17:14,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:17:14" (1/1) ... [2022-11-23 15:17:14,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:17:14,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:17:15,564 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_ec696576-7f19-4cf1-83b2-7237c5dc2f75/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c[65679,65692] [2022-11-23 15:17:15,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:17:15,610 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:17:15,763 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_ec696576-7f19-4cf1-83b2-7237c5dc2f75/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c[65679,65692] [2022-11-23 15:17:15,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:17:15,792 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:17:15,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15 WrapperNode [2022-11-23 15:17:15,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:17:15,795 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:17:15,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:17:15,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:17:15,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:15,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:15,956 INFO L138 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2053 [2022-11-23 15:17:15,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:17:15,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:17:15,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:17:15,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:17:15,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:15,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:15,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:15,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:16,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:16,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:16,113 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:16,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:16,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:17:16,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:17:16,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:17:16,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:17:16,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (1/1) ... [2022-11-23 15:17:16,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:17:16,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:16,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:17:16,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:17:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:17:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:17:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:17:16,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:17:16,563 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:17:16,565 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:17:18,667 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:17:21,431 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:17:21,431 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:17:21,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:17:21 BoogieIcfgContainer [2022-11-23 15:17:21,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:17:21,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:17:21,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:17:21,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:17:21,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:17:14" (1/3) ... [2022-11-23 15:17:21,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5adc8752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:17:21, skipping insertion in model container [2022-11-23 15:17:21,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:15" (2/3) ... [2022-11-23 15:17:21,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5adc8752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:17:21, skipping insertion in model container [2022-11-23 15:17:21,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:17:21" (3/3) ... [2022-11-23 15:17:21,459 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c [2022-11-23 15:17:21,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:17:21,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:17:21,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:17:21,605 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;@7df0cb38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:17:21,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:17:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 15:17:21,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:21,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:21,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 398479465, now seen corresponding path program 1 times [2022-11-23 15:17:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:21,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462601164] [2022-11-23 15:17:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:17:33,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:33,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462601164] [2022-11-23 15:17:33,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462601164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:33,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:33,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:17:33,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596639186] [2022-11-23 15:17:33,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:33,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:17:33,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:33,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:17:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:33,581 INFO L87 Difference]: Start difference. First operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:34,150 INFO L93 Difference]: Finished difference Result 480 states and 822 transitions. [2022-11-23 15:17:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:17:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2022-11-23 15:17:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:34,170 INFO L225 Difference]: With dead ends: 480 [2022-11-23 15:17:34,170 INFO L226 Difference]: Without dead ends: 460 [2022-11-23 15:17:34,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:34,178 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 28 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:34,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1356 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:17:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-23 15:17:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2022-11-23 15:17:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions. [2022-11-23 15:17:34,254 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126 [2022-11-23 15:17:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:34,255 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 769 transitions. [2022-11-23 15:17:34,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions. [2022-11-23 15:17:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 15:17:34,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:34,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:34,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:17:34,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:34,262 INFO L85 PathProgramCache]: Analyzing trace with hash -605723372, now seen corresponding path program 1 times [2022-11-23 15:17:34,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:34,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108808039] [2022-11-23 15:17:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:34,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:17:41,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:41,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108808039] [2022-11-23 15:17:41,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108808039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:41,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:41,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:17:41,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975273177] [2022-11-23 15:17:41,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:41,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:17:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:41,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:17:41,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:41,063 INFO L87 Difference]: Start difference. First operand 450 states and 769 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:41,592 INFO L93 Difference]: Finished difference Result 483 states and 819 transitions. [2022-11-23 15:17:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:17:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-23 15:17:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:41,596 INFO L225 Difference]: With dead ends: 483 [2022-11-23 15:17:41,597 INFO L226 Difference]: Without dead ends: 462 [2022-11-23 15:17:41,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:41,599 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 26 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:41,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:17:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-23 15:17:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-23 15:17:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions. [2022-11-23 15:17:41,650 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127 [2022-11-23 15:17:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:41,650 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 768 transitions. [2022-11-23 15:17:41,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions. [2022-11-23 15:17:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 15:17:41,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:41,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:41,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:17:41,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:41,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1665788494, now seen corresponding path program 1 times [2022-11-23 15:17:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:41,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084662789] [2022-11-23 15:17:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:41,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:17:47,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:47,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084662789] [2022-11-23 15:17:47,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084662789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:47,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:47,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:17:47,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279180276] [2022-11-23 15:17:47,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:47,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:17:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:47,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:17:47,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:47,664 INFO L87 Difference]: Start difference. First operand 450 states and 768 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:48,092 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2022-11-23 15:17:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:17:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-11-23 15:17:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:48,096 INFO L225 Difference]: With dead ends: 483 [2022-11-23 15:17:48,097 INFO L226 Difference]: Without dead ends: 462 [2022-11-23 15:17:48,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:48,099 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 24 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:48,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:17:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-23 15:17:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-23 15:17:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions. [2022-11-23 15:17:48,118 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128 [2022-11-23 15:17:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:48,118 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 767 transitions. [2022-11-23 15:17:48,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions. [2022-11-23 15:17:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-23 15:17:48,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:48,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:48,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:17:48,125 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash -162617155, now seen corresponding path program 1 times [2022-11-23 15:17:48,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:48,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603277730] [2022-11-23 15:17:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:48,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:17:53,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:53,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603277730] [2022-11-23 15:17:53,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603277730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:53,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:53,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:17:53,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128244366] [2022-11-23 15:17:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:53,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:17:53,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:17:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:53,263 INFO L87 Difference]: Start difference. First operand 450 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:53,700 INFO L93 Difference]: Finished difference Result 483 states and 817 transitions. [2022-11-23 15:17:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:17:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-23 15:17:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:53,704 INFO L225 Difference]: With dead ends: 483 [2022-11-23 15:17:53,704 INFO L226 Difference]: Without dead ends: 462 [2022-11-23 15:17:53,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:53,707 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 22 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:53,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:17:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-23 15:17:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-23 15:17:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions. [2022-11-23 15:17:53,725 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129 [2022-11-23 15:17:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:53,726 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 766 transitions. [2022-11-23 15:17:53,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions. [2022-11-23 15:17:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 15:17:53,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:53,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:53,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:17:53,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:53,731 INFO L85 PathProgramCache]: Analyzing trace with hash -803494149, now seen corresponding path program 1 times [2022-11-23 15:17:53,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:53,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828585225] [2022-11-23 15:17:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:53,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:17:58,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828585225] [2022-11-23 15:17:58,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828585225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:58,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:58,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:17:58,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649627500] [2022-11-23 15:17:58,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:58,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:17:58,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:17:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:58,130 INFO L87 Difference]: Start difference. First operand 450 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:58,483 INFO L93 Difference]: Finished difference Result 483 states and 816 transitions. [2022-11-23 15:17:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:17:58,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-23 15:17:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:58,487 INFO L225 Difference]: With dead ends: 483 [2022-11-23 15:17:58,487 INFO L226 Difference]: Without dead ends: 462 [2022-11-23 15:17:58,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:58,488 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 20 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:58,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1372 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:17:58,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-23 15:17:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-23 15:17:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions. [2022-11-23 15:17:58,503 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130 [2022-11-23 15:17:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:58,504 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 765 transitions. [2022-11-23 15:17:58,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions. [2022-11-23 15:17:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-23 15:17:58,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:58,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:58,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:17:58,508 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:58,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:58,509 INFO L85 PathProgramCache]: Analyzing trace with hash 809607270, now seen corresponding path program 1 times [2022-11-23 15:17:58,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:58,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992292832] [2022-11-23 15:17:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:58,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:18:02,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:02,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992292832] [2022-11-23 15:18:02,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992292832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:02,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:02,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:18:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597289054] [2022-11-23 15:18:02,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:02,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:18:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:18:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:18:02,023 INFO L87 Difference]: Start difference. First operand 450 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:02,329 INFO L93 Difference]: Finished difference Result 483 states and 815 transitions. [2022-11-23 15:18:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:18:02,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2022-11-23 15:18:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:02,331 INFO L225 Difference]: With dead ends: 483 [2022-11-23 15:18:02,332 INFO L226 Difference]: Without dead ends: 462 [2022-11-23 15:18:02,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:18:02,333 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 18 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:02,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1371 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:18:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-23 15:18:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-23 15:18:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2022-11-23 15:18:02,346 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131 [2022-11-23 15:18:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:02,347 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2022-11-23 15:18:02,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2022-11-23 15:18:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-23 15:18:02,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:02,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:02,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:18:02,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash -834742226, now seen corresponding path program 1 times [2022-11-23 15:18:02,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:02,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392426982] [2022-11-23 15:18:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:02,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:18:07,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:07,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392426982] [2022-11-23 15:18:07,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392426982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:07,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:07,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:18:07,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815777934] [2022-11-23 15:18:07,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:07,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:18:07,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:18:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:18:07,179 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:07,588 INFO L93 Difference]: Finished difference Result 481 states and 811 transitions. [2022-11-23 15:18:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:18:07,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-11-23 15:18:07,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:07,592 INFO L225 Difference]: With dead ends: 481 [2022-11-23 15:18:07,592 INFO L226 Difference]: Without dead ends: 460 [2022-11-23 15:18:07,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:18:07,594 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 15 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:07,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1362 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:18:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-23 15:18:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2022-11-23 15:18:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.7) internal successors, (765), 450 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 765 transitions. [2022-11-23 15:18:07,613 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 765 transitions. Word has length 133 [2022-11-23 15:18:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:07,614 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 765 transitions. [2022-11-23 15:18:07,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 765 transitions. [2022-11-23 15:18:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-23 15:18:07,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:07,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:07,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:18:07,618 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:07,618 INFO L85 PathProgramCache]: Analyzing trace with hash -195279182, now seen corresponding path program 1 times [2022-11-23 15:18:07,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:07,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435028126] [2022-11-23 15:18:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:07,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:18:12,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:12,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435028126] [2022-11-23 15:18:12,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435028126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:12,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:12,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:18:12,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286675508] [2022-11-23 15:18:12,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:12,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:18:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:12,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:18:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:18:12,739 INFO L87 Difference]: Start difference. First operand 451 states and 765 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:13,125 INFO L93 Difference]: Finished difference Result 482 states and 812 transitions. [2022-11-23 15:18:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:18:13,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-23 15:18:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:13,128 INFO L225 Difference]: With dead ends: 482 [2022-11-23 15:18:13,128 INFO L226 Difference]: Without dead ends: 461 [2022-11-23 15:18:13,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:18:13,130 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 12 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:13,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2046 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:18:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-23 15:18:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2022-11-23 15:18:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2022-11-23 15:18:13,147 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 134 [2022-11-23 15:18:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:13,148 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2022-11-23 15:18:13,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2022-11-23 15:18:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:18:13,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:13,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:13,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:18:13,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1470613064, now seen corresponding path program 1 times [2022-11-23 15:18:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:13,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872364065] [2022-11-23 15:18:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:13,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:18:17,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:17,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872364065] [2022-11-23 15:18:17,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872364065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:17,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:17,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:18:17,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573396079] [2022-11-23 15:18:17,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:17,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:18:17,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:17,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:18:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:18:17,937 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:18,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:18,267 INFO L93 Difference]: Finished difference Result 482 states and 809 transitions. [2022-11-23 15:18:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:18:18,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-11-23 15:18:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:18,270 INFO L225 Difference]: With dead ends: 482 [2022-11-23 15:18:18,270 INFO L226 Difference]: Without dead ends: 461 [2022-11-23 15:18:18,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:18:18,271 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 7 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:18,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1365 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:18:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-23 15:18:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 454. [2022-11-23 15:18:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6931567328918322) internal successors, (767), 453 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 767 transitions. [2022-11-23 15:18:18,288 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 767 transitions. Word has length 136 [2022-11-23 15:18:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:18,289 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 767 transitions. [2022-11-23 15:18:18,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 767 transitions. [2022-11-23 15:18:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 15:18:18,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:18,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:18,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:18:18,292 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1650112181, now seen corresponding path program 1 times [2022-11-23 15:18:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98464734] [2022-11-23 15:18:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:18:18,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98464734] [2022-11-23 15:18:18,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98464734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:18,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:18,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:18:18,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508750064] [2022-11-23 15:18:18,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:18,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:18:18,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:18:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:18:18,788 INFO L87 Difference]: Start difference. First operand 454 states and 767 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:19,274 INFO L93 Difference]: Finished difference Result 505 states and 847 transitions. [2022-11-23 15:18:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:18:19,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-11-23 15:18:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:19,277 INFO L225 Difference]: With dead ends: 505 [2022-11-23 15:18:19,277 INFO L226 Difference]: Without dead ends: 484 [2022-11-23 15:18:19,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:18:19,279 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 47 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:19,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2754 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:18:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-23 15:18:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2022-11-23 15:18:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 456 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 769 transitions. [2022-11-23 15:18:19,295 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 769 transitions. Word has length 137 [2022-11-23 15:18:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:19,296 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 769 transitions. [2022-11-23 15:18:19,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:18:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 769 transitions. [2022-11-23 15:18:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 15:18:19,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:19,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:19,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:18:19,299 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:19,299 INFO L85 PathProgramCache]: Analyzing trace with hash -828001888, now seen corresponding path program 1 times [2022-11-23 15:18:19,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:19,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965407033] [2022-11-23 15:18:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:19,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:02,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:02,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965407033] [2022-11-23 15:19:02,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965407033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:02,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160114155] [2022-11-23 15:19:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:02,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:02,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:02,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:02,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec696576-7f19-4cf1-83b2-7237c5dc2f75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:19:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:03,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:19:03,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:51,137 WARN L233 SmtUtils]: Spent 11.68s on a formula simplification. DAG size of input: 702 DAG size of output: 553 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:01,498 INFO L328 TraceCheckSpWp]: Computing backward predicates...