./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI --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 2b9ed7c85c1e945b329b46ea2facde1ef0195f46b3e9e9585453dabdeb816de5 --- 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-5e519f3 [2022-11-03 02:50:49,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:50:49,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:50:50,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:50:50,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:50:50,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:50:50,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:50:50,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:50:50,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:50:50,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:50:50,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:50:50,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:50:50,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:50:50,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:50:50,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:50:50,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:50:50,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:50:50,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:50:50,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:50:50,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:50:50,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:50:50,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:50:50,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:50:50,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:50:50,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:50:50,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:50:50,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:50:50,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:50:50,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:50:50,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:50:50,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:50:50,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:50:50,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:50:50,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:50:50,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:50:50,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:50:50,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:50:50,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:50:50,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:50:50,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:50:50,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:50:50,056 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:50:50,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:50:50,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:50:50,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:50:50,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:50:50,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:50:50,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:50:50,082 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:50:50,082 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:50:50,082 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:50:50,082 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:50:50,083 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:50:50,083 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:50:50,083 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:50:50,084 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:50:50,084 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:50:50,084 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:50:50,084 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:50:50,085 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:50:50,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:50:50,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:50:50,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:50:50,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:50:50,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:50:50,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:50:50,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:50:50,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:50:50,088 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:50:50,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:50:50,088 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:50:50,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:50:50,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:50:50,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:50:50,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:50,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:50:50,090 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:50:50,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:50:50,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:50:50,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:50:50,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:50:50,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:50:50,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:50:50,092 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_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b9ed7c85c1e945b329b46ea2facde1ef0195f46b3e9e9585453dabdeb816de5 [2022-11-03 02:50:50,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:50:50,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:50:50,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:50:50,382 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:50:50,383 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:50:50,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c [2022-11-03 02:50:50,450 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/data/2cae3b1e4/611434a454e340d8a5585e15ebae2e02/FLAGeba422994 [2022-11-03 02:50:50,890 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:50:50,896 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c [2022-11-03 02:50:50,910 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/data/2cae3b1e4/611434a454e340d8a5585e15ebae2e02/FLAGeba422994 [2022-11-03 02:50:51,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/data/2cae3b1e4/611434a454e340d8a5585e15ebae2e02 [2022-11-03 02:50:51,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:50:51,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:50:51,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:51,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:50:51,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:50:51,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68558c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51, skipping insertion in model container [2022-11-03 02:50:51,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:50:51,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:50:51,569 WARN L230 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_bdfaed80-8b55-4025-93bb-69009476bbe5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[911,924] [2022-11-03 02:50:51,665 WARN L230 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_bdfaed80-8b55-4025-93bb-69009476bbe5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[8416,8429] [2022-11-03 02:50:51,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:51,731 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:50:51,742 WARN L230 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_bdfaed80-8b55-4025-93bb-69009476bbe5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[911,924] [2022-11-03 02:50:51,765 WARN L230 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_bdfaed80-8b55-4025-93bb-69009476bbe5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[8416,8429] [2022-11-03 02:50:51,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:51,822 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:50:51,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51 WrapperNode [2022-11-03 02:50:51,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:51,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:51,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:50:51,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:50:51,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,900 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 672 [2022-11-03 02:50:51,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:51,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:50:51,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:50:51,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:50:51,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,959 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:50:51,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:50:51,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:50:51,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:50:51,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (1/1) ... [2022-11-03 02:50:51,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:51,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:52,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:50:52,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:50:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:50:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:50:52,054 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:50:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 02:50:52,054 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 02:50:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 02:50:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 02:50:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 02:50:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 02:50:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 02:50:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 02:50:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 02:50:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 02:50:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 02:50:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 02:50:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 02:50:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 02:50:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 02:50:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 02:50:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 02:50:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 02:50:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 02:50:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 02:50:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:50:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 02:50:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 02:50:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 02:50:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 02:50:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:50:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:50:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 02:50:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 02:50:52,174 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:50:52,177 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:50:52,977 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-03 02:50:52,977 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-03 02:50:53,057 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:50:53,388 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:50:53,388 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-03 02:50:53,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:53 BoogieIcfgContainer [2022-11-03 02:50:53,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:50:53,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:50:53,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:50:53,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:50:53,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:50:51" (1/3) ... [2022-11-03 02:50:53,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421c5c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:53, skipping insertion in model container [2022-11-03 02:50:53,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:51" (2/3) ... [2022-11-03 02:50:53,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421c5c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:53, skipping insertion in model container [2022-11-03 02:50:53,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:53" (3/3) ... [2022-11-03 02:50:53,407 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.05.cil-1.c [2022-11-03 02:50:53,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:50:53,433 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:50:53,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:50:53,530 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;@3c0527f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:50:53,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:50:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 144 states have internal predecessors, (209), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-03 02:50:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:50:53,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:53,548 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] [2022-11-03 02:50:53,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:53,555 INFO L85 PathProgramCache]: Analyzing trace with hash 301180781, now seen corresponding path program 1 times [2022-11-03 02:50:53,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:53,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352126236] [2022-11-03 02:50:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:53,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:54,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:54,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352126236] [2022-11-03 02:50:54,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352126236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:54,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:54,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:50:54,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235018880] [2022-11-03 02:50:54,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:54,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:50:54,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:50:54,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:50:54,107 INFO L87 Difference]: Start difference. First operand has 190 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 144 states have internal predecessors, (209), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:50:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:54,763 INFO L93 Difference]: Finished difference Result 503 states and 736 transitions. [2022-11-03 02:50:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:50:54,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-03 02:50:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:54,791 INFO L225 Difference]: With dead ends: 503 [2022-11-03 02:50:54,791 INFO L226 Difference]: Without dead ends: 314 [2022-11-03 02:50:54,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:50:54,806 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 331 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:54,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 510 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:50:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-03 02:50:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 303. [2022-11-03 02:50:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 219 states have (on average 1.4109589041095891) internal successors, (309), 223 states have internal predecessors, (309), 55 states have call successors, (55), 28 states have call predecessors, (55), 27 states have return successors, (56), 53 states have call predecessors, (56), 53 states have call successors, (56) [2022-11-03 02:50:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 420 transitions. [2022-11-03 02:50:54,928 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 420 transitions. Word has length 44 [2022-11-03 02:50:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:54,929 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 420 transitions. [2022-11-03 02:50:54,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:50:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 420 transitions. [2022-11-03 02:50:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:50:54,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:54,940 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] [2022-11-03 02:50:54,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:50:54,940 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1834054908, now seen corresponding path program 1 times [2022-11-03 02:50:54,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:54,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227645972] [2022-11-03 02:50:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:55,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:55,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227645972] [2022-11-03 02:50:55,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227645972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:55,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:55,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:50:55,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398165015] [2022-11-03 02:50:55,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:55,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:50:55,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:50:55,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:55,179 INFO L87 Difference]: Start difference. First operand 303 states and 420 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:50:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:56,117 INFO L93 Difference]: Finished difference Result 840 states and 1143 transitions. [2022-11-03 02:50:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:50:56,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 02:50:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:56,121 INFO L225 Difference]: With dead ends: 840 [2022-11-03 02:50:56,121 INFO L226 Difference]: Without dead ends: 374 [2022-11-03 02:50:56,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:50:56,124 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 750 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:56,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 919 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:50:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-03 02:50:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 289. [2022-11-03 02:50:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 205 states have (on average 1.3463414634146342) internal successors, (276), 209 states have internal predecessors, (276), 55 states have call successors, (55), 28 states have call predecessors, (55), 27 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-11-03 02:50:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 384 transitions. [2022-11-03 02:50:56,166 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 384 transitions. Word has length 45 [2022-11-03 02:50:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:56,166 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 384 transitions. [2022-11-03 02:50:56,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:50:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 384 transitions. [2022-11-03 02:50:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:50:56,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:56,173 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] [2022-11-03 02:50:56,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:50:56,174 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash 174691287, now seen corresponding path program 1 times [2022-11-03 02:50:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131614124] [2022-11-03 02:50:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:56,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:56,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:56,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131614124] [2022-11-03 02:50:56,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131614124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:56,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:56,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517541778] [2022-11-03 02:50:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:56,507 INFO L87 Difference]: Start difference. First operand 289 states and 384 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:50:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:57,320 INFO L93 Difference]: Finished difference Result 591 states and 752 transitions. [2022-11-03 02:50:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:50:57,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-03 02:50:57,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:57,323 INFO L225 Difference]: With dead ends: 591 [2022-11-03 02:50:57,324 INFO L226 Difference]: Without dead ends: 417 [2022-11-03 02:50:57,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:50:57,326 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 388 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:57,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 810 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:50:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-03 02:50:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 391. [2022-11-03 02:50:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 273 states have (on average 1.3113553113553114) internal successors, (358), 277 states have internal predecessors, (358), 75 states have call successors, (75), 42 states have call predecessors, (75), 41 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-11-03 02:50:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 506 transitions. [2022-11-03 02:50:57,370 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 506 transitions. Word has length 46 [2022-11-03 02:50:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:57,371 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 506 transitions. [2022-11-03 02:50:57,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:50:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 506 transitions. [2022-11-03 02:50:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:50:57,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:57,375 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] [2022-11-03 02:50:57,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:50:57,375 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash -877904287, now seen corresponding path program 1 times [2022-11-03 02:50:57,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:57,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963224753] [2022-11-03 02:50:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:57,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:57,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:57,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963224753] [2022-11-03 02:50:57,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963224753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:57,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:57,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:50:57,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987185387] [2022-11-03 02:50:57,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:57,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:57,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:57,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:57,483 INFO L87 Difference]: Start difference. First operand 391 states and 506 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:50:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:57,579 INFO L93 Difference]: Finished difference Result 656 states and 842 transitions. [2022-11-03 02:50:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-03 02:50:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:57,581 INFO L225 Difference]: With dead ends: 656 [2022-11-03 02:50:57,581 INFO L226 Difference]: Without dead ends: 110 [2022-11-03 02:50:57,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:57,583 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 231 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:57,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 203 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:50:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-03 02:50:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-03 02:50:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 85 states have internal predecessors, (123), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-03 02:50:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 161 transitions. [2022-11-03 02:50:57,596 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 161 transitions. Word has length 47 [2022-11-03 02:50:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:57,597 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 161 transitions. [2022-11-03 02:50:57,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:50:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 161 transitions. [2022-11-03 02:50:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:50:57,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:57,598 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] [2022-11-03 02:50:57,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:50:57,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:57,599 INFO L85 PathProgramCache]: Analyzing trace with hash 126691969, now seen corresponding path program 1 times [2022-11-03 02:50:57,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:57,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226825716] [2022-11-03 02:50:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:57,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:57,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:57,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226825716] [2022-11-03 02:50:57,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226825716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:57,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:57,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:50:57,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117676478] [2022-11-03 02:50:57,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:57,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:50:57,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:57,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:50:57,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:57,720 INFO L87 Difference]: Start difference. First operand 110 states and 161 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:50:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:58,302 INFO L93 Difference]: Finished difference Result 603 states and 941 transitions. [2022-11-03 02:50:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:50:58,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-11-03 02:50:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:58,308 INFO L225 Difference]: With dead ends: 603 [2022-11-03 02:50:58,308 INFO L226 Difference]: Without dead ends: 499 [2022-11-03 02:50:58,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:50:58,312 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 671 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:58,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 691 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:50:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-03 02:50:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 488. [2022-11-03 02:50:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 381 states have (on average 1.4619422572178478) internal successors, (557), 385 states have internal predecessors, (557), 76 states have call successors, (76), 30 states have call predecessors, (76), 30 states have return successors, (110), 73 states have call predecessors, (110), 76 states have call successors, (110) [2022-11-03 02:50:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 743 transitions. [2022-11-03 02:50:58,364 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 743 transitions. Word has length 46 [2022-11-03 02:50:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:58,365 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 743 transitions. [2022-11-03 02:50:58,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:50:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 743 transitions. [2022-11-03 02:50:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:50:58,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:58,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:58,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:50:58,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:58,368 INFO L85 PathProgramCache]: Analyzing trace with hash 518975534, now seen corresponding path program 1 times [2022-11-03 02:50:58,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:58,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220774265] [2022-11-03 02:50:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:58,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:50:58,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:58,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220774265] [2022-11-03 02:50:58,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220774265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:58,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76014201] [2022-11-03 02:50:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:58,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:58,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:58,486 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:58,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:50:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:58,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:50:58,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:50:58,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:58,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76014201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:58,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:58,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:50:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590500125] [2022-11-03 02:50:58,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:58,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:58,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:58,789 INFO L87 Difference]: Start difference. First operand 488 states and 743 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:50:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:59,030 INFO L93 Difference]: Finished difference Result 1436 states and 2248 transitions. [2022-11-03 02:50:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-11-03 02:50:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:59,039 INFO L225 Difference]: With dead ends: 1436 [2022-11-03 02:50:59,040 INFO L226 Difference]: Without dead ends: 954 [2022-11-03 02:50:59,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:59,047 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 130 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:59,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:50:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-11-03 02:50:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 947. [2022-11-03 02:50:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 743 states have (on average 1.4535666218034993) internal successors, (1080), 750 states have internal predecessors, (1080), 143 states have call successors, (143), 60 states have call predecessors, (143), 60 states have return successors, (207), 137 states have call predecessors, (207), 143 states have call successors, (207) [2022-11-03 02:50:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1430 transitions. [2022-11-03 02:50:59,163 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1430 transitions. Word has length 87 [2022-11-03 02:50:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:59,163 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1430 transitions. [2022-11-03 02:50:59,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:50:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1430 transitions. [2022-11-03 02:50:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:50:59,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:59,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:59,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:59,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:50:59,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:59,395 INFO L85 PathProgramCache]: Analyzing trace with hash 915455212, now seen corresponding path program 1 times [2022-11-03 02:50:59,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:59,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626681516] [2022-11-03 02:50:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:59,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:50:59,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:59,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626681516] [2022-11-03 02:50:59,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626681516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:59,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515784456] [2022-11-03 02:50:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:59,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:59,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:59,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:50:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:59,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:50:59,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:50:59,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:59,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515784456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:59,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:59,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:50:59,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643645287] [2022-11-03 02:50:59,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:59,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:59,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:59,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:59,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:50:59,777 INFO L87 Difference]: Start difference. First operand 947 states and 1430 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:51:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:00,043 INFO L93 Difference]: Finished difference Result 2798 states and 4338 transitions. [2022-11-03 02:51:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:00,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-11-03 02:51:00,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:00,055 INFO L225 Difference]: With dead ends: 2798 [2022-11-03 02:51:00,055 INFO L226 Difference]: Without dead ends: 1857 [2022-11-03 02:51:00,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:51:00,063 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 133 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:00,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:00,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-03 02:51:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1845. [2022-11-03 02:51:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1452 states have (on average 1.443526170798898) internal successors, (2096), 1465 states have internal predecessors, (2096), 272 states have call successors, (272), 120 states have call predecessors, (272), 120 states have return successors, (392), 260 states have call predecessors, (392), 272 states have call successors, (392) [2022-11-03 02:51:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2760 transitions. [2022-11-03 02:51:00,229 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2760 transitions. Word has length 87 [2022-11-03 02:51:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:00,229 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 2760 transitions. [2022-11-03 02:51:00,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:51:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2760 transitions. [2022-11-03 02:51:00,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:51:00,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:00,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:00,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:00,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:51:00,471 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:00,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1281478510, now seen corresponding path program 1 times [2022-11-03 02:51:00,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:00,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832287630] [2022-11-03 02:51:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:00,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:51:00,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:00,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832287630] [2022-11-03 02:51:00,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832287630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:00,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:00,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:00,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436433209] [2022-11-03 02:51:00,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:00,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:00,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:00,550 INFO L87 Difference]: Start difference. First operand 1845 states and 2760 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:51:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:00,830 INFO L93 Difference]: Finished difference Result 3743 states and 5729 transitions. [2022-11-03 02:51:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-11-03 02:51:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:00,849 INFO L225 Difference]: With dead ends: 3743 [2022-11-03 02:51:00,850 INFO L226 Difference]: Without dead ends: 2269 [2022-11-03 02:51:00,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:00,857 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 65 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:00,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 335 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-11-03 02:51:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2089. [2022-11-03 02:51:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1680 states have (on average 1.4785714285714286) internal successors, (2484), 1693 states have internal predecessors, (2484), 280 states have call successors, (280), 128 states have call predecessors, (280), 128 states have return successors, (400), 268 states have call predecessors, (400), 280 states have call successors, (400) [2022-11-03 02:51:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3164 transitions. [2022-11-03 02:51:01,069 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3164 transitions. Word has length 87 [2022-11-03 02:51:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:01,070 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 3164 transitions. [2022-11-03 02:51:01,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:51:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3164 transitions. [2022-11-03 02:51:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:51:01,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:01,077 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:01,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:51:01,078 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:01,078 INFO L85 PathProgramCache]: Analyzing trace with hash 199797023, now seen corresponding path program 1 times [2022-11-03 02:51:01,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:01,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049982426] [2022-11-03 02:51:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:01,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:51:01,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:01,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049982426] [2022-11-03 02:51:01,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049982426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:01,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:01,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:01,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745338998] [2022-11-03 02:51:01,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:01,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:01,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:01,188 INFO L87 Difference]: Start difference. First operand 2089 states and 3164 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:51:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:01,602 INFO L93 Difference]: Finished difference Result 6166 states and 9533 transitions. [2022-11-03 02:51:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:01,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-03 02:51:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:01,636 INFO L225 Difference]: With dead ends: 6166 [2022-11-03 02:51:01,636 INFO L226 Difference]: Without dead ends: 4083 [2022-11-03 02:51:01,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:01,648 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 126 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:01,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 267 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-11-03 02:51:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 4053. [2022-11-03 02:51:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 3260 states have (on average 1.463803680981595) internal successors, (4772), 3285 states have internal predecessors, (4772), 536 states have call successors, (536), 256 states have call predecessors, (536), 256 states have return successors, (760), 512 states have call predecessors, (760), 536 states have call successors, (760) [2022-11-03 02:51:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 6068 transitions. [2022-11-03 02:51:02,069 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 6068 transitions. Word has length 116 [2022-11-03 02:51:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:02,070 INFO L495 AbstractCegarLoop]: Abstraction has 4053 states and 6068 transitions. [2022-11-03 02:51:02,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:51:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 6068 transitions. [2022-11-03 02:51:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:51:02,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:02,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:02,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:51:02,086 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:02,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:02,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1430016577, now seen corresponding path program 1 times [2022-11-03 02:51:02,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:02,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108362772] [2022-11-03 02:51:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:02,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:51:02,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:02,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108362772] [2022-11-03 02:51:02,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108362772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:02,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:02,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:02,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676917848] [2022-11-03 02:51:02,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:02,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:02,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:02,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:02,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:02,209 INFO L87 Difference]: Start difference. First operand 4053 states and 6068 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:51:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:02,905 INFO L93 Difference]: Finished difference Result 11970 states and 18269 transitions. [2022-11-03 02:51:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:02,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-03 02:51:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:02,952 INFO L225 Difference]: With dead ends: 11970 [2022-11-03 02:51:02,953 INFO L226 Difference]: Without dead ends: 7923 [2022-11-03 02:51:02,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:02,973 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 129 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:02,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 267 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2022-11-03 02:51:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 7865. [2022-11-03 02:51:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 6324 states have (on average 1.4478178368121442) internal successors, (9156), 6373 states have internal predecessors, (9156), 1028 states have call successors, (1028), 512 states have call predecessors, (1028), 512 states have return successors, (1444), 980 states have call predecessors, (1444), 1028 states have call successors, (1444) [2022-11-03 02:51:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 11628 transitions. [2022-11-03 02:51:03,787 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 11628 transitions. Word has length 116 [2022-11-03 02:51:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:03,793 INFO L495 AbstractCegarLoop]: Abstraction has 7865 states and 11628 transitions. [2022-11-03 02:51:03,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:51:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 11628 transitions. [2022-11-03 02:51:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:51:03,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:03,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:03,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:51:03,839 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:03,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1687523156, now seen corresponding path program 1 times [2022-11-03 02:51:03,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:03,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263548679] [2022-11-03 02:51:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:03,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 02:51:04,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:04,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263548679] [2022-11-03 02:51:04,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263548679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:04,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512652325] [2022-11-03 02:51:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:04,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:04,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:04,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:04,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:51:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:04,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:51:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:51:04,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:04,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512652325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:04,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:04,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:51:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564860916] [2022-11-03 02:51:04,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:04,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:51:04,339 INFO L87 Difference]: Start difference. First operand 7865 states and 11628 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:51:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:05,427 INFO L93 Difference]: Finished difference Result 14580 states and 21537 transitions. [2022-11-03 02:51:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-11-03 02:51:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:05,494 INFO L225 Difference]: With dead ends: 14580 [2022-11-03 02:51:05,500 INFO L226 Difference]: Without dead ends: 9922 [2022-11-03 02:51:05,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:51:05,529 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 123 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:05,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 184 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9922 states. [2022-11-03 02:51:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9922 to 9922. [2022-11-03 02:51:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9922 states, 8146 states have (on average 1.40265160815124) internal successors, (11426), 8195 states have internal predecessors, (11426), 1105 states have call successors, (1105), 669 states have call predecessors, (1105), 670 states have return successors, (1583), 1058 states have call predecessors, (1583), 1105 states have call successors, (1583) [2022-11-03 02:51:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 14114 transitions. [2022-11-03 02:51:06,526 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 14114 transitions. Word has length 134 [2022-11-03 02:51:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:06,526 INFO L495 AbstractCegarLoop]: Abstraction has 9922 states and 14114 transitions. [2022-11-03 02:51:06,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:51:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 14114 transitions. [2022-11-03 02:51:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:51:06,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:06,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:06,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:06,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:06,787 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1688469517, now seen corresponding path program 1 times [2022-11-03 02:51:06,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:06,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22895447] [2022-11-03 02:51:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:06,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 02:51:06,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:06,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22895447] [2022-11-03 02:51:06,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22895447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:06,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356542572] [2022-11-03 02:51:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:06,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:06,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:06,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:06,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:51:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:07,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:51:07,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:51:07,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:07,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356542572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:07,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:07,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:51:07,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496627244] [2022-11-03 02:51:07,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:07,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:07,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:51:07,300 INFO L87 Difference]: Start difference. First operand 9922 states and 14114 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:51:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:08,453 INFO L93 Difference]: Finished difference Result 18943 states and 27392 transitions. [2022-11-03 02:51:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-11-03 02:51:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:08,533 INFO L225 Difference]: With dead ends: 18943 [2022-11-03 02:51:08,534 INFO L226 Difference]: Without dead ends: 13845 [2022-11-03 02:51:08,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:51:08,559 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 96 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:08,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 362 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13845 states. [2022-11-03 02:51:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13845 to 11370. [2022-11-03 02:51:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 9482 states have (on average 1.4404134148913732) internal successors, (13658), 9531 states have internal predecessors, (13658), 1161 states have call successors, (1161), 725 states have call predecessors, (1161), 726 states have return successors, (1639), 1114 states have call predecessors, (1639), 1161 states have call successors, (1639) [2022-11-03 02:51:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 16458 transitions. [2022-11-03 02:51:09,827 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 16458 transitions. Word has length 134 [2022-11-03 02:51:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:09,827 INFO L495 AbstractCegarLoop]: Abstraction has 11370 states and 16458 transitions. [2022-11-03 02:51:09,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:51:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 16458 transitions. [2022-11-03 02:51:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:51:09,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:09,859 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:09,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:10,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:51:10,086 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1983233044, now seen corresponding path program 2 times [2022-11-03 02:51:10,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:10,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000928954] [2022-11-03 02:51:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:10,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:51:10,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000928954] [2022-11-03 02:51:10,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000928954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:10,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085679176] [2022-11-03 02:51:10,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:51:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:10,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:10,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:51:10,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:51:10,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:10,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:51:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:51:10,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:10,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085679176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:10,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:10,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:51:10,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38548000] [2022-11-03 02:51:10,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:10,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:10,783 INFO L87 Difference]: Start difference. First operand 11370 states and 16458 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:51:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:12,194 INFO L93 Difference]: Finished difference Result 22941 states and 33965 transitions. [2022-11-03 02:51:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:12,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2022-11-03 02:51:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:12,269 INFO L225 Difference]: With dead ends: 22941 [2022-11-03 02:51:12,269 INFO L226 Difference]: Without dead ends: 16204 [2022-11-03 02:51:12,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:12,302 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 118 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:12,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 373 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16204 states. [2022-11-03 02:51:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16204 to 15914. [2022-11-03 02:51:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15914 states, 13279 states have (on average 1.4343700579862941) internal successors, (19047), 13344 states have internal predecessors, (19047), 1615 states have call successors, (1615), 1019 states have call predecessors, (1615), 1019 states have return successors, (2520), 1551 states have call predecessors, (2520), 1615 states have call successors, (2520) [2022-11-03 02:51:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15914 states to 15914 states and 23182 transitions. [2022-11-03 02:51:13,522 INFO L78 Accepts]: Start accepts. Automaton has 15914 states and 23182 transitions. Word has length 134 [2022-11-03 02:51:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:13,523 INFO L495 AbstractCegarLoop]: Abstraction has 15914 states and 23182 transitions. [2022-11-03 02:51:13,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:51:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 15914 states and 23182 transitions. [2022-11-03 02:51:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 02:51:13,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:13,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:13,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:13,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:51:13,774 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1780675220, now seen corresponding path program 1 times [2022-11-03 02:51:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:13,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464066052] [2022-11-03 02:51:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:13,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:51:14,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:14,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464066052] [2022-11-03 02:51:14,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464066052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:14,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235688881] [2022-11-03 02:51:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:14,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:14,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:14,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:51:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:14,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:51:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:51:14,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:14,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235688881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:14,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:14,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:51:14,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738343912] [2022-11-03 02:51:14,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:14,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:14,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:14,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:14,539 INFO L87 Difference]: Start difference. First operand 15914 states and 23182 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:51:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:16,146 INFO L93 Difference]: Finished difference Result 25134 states and 37832 transitions. [2022-11-03 02:51:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:16,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2022-11-03 02:51:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:16,234 INFO L225 Difference]: With dead ends: 25134 [2022-11-03 02:51:16,234 INFO L226 Difference]: Without dead ends: 15972 [2022-11-03 02:51:16,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:16,272 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 118 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:16,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 361 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15972 states. [2022-11-03 02:51:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15972 to 15866. [2022-11-03 02:51:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15866 states, 13231 states have (on average 1.4153881036958658) internal successors, (18727), 13296 states have internal predecessors, (18727), 1615 states have call successors, (1615), 1019 states have call predecessors, (1615), 1019 states have return successors, (2520), 1551 states have call predecessors, (2520), 1615 states have call successors, (2520) [2022-11-03 02:51:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15866 states to 15866 states and 22862 transitions. [2022-11-03 02:51:17,629 INFO L78 Accepts]: Start accepts. Automaton has 15866 states and 22862 transitions. Word has length 135 [2022-11-03 02:51:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:17,629 INFO L495 AbstractCegarLoop]: Abstraction has 15866 states and 22862 transitions. [2022-11-03 02:51:17,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:51:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 15866 states and 22862 transitions. [2022-11-03 02:51:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 02:51:17,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:17,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:17,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:17,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:17,882 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2067497228, now seen corresponding path program 1 times [2022-11-03 02:51:17,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:17,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700995448] [2022-11-03 02:51:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:17,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:51:18,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:18,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700995448] [2022-11-03 02:51:18,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700995448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:18,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229608814] [2022-11-03 02:51:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:18,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:18,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:18,344 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:18,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:51:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:18,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:51:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:51:18,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:18,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229608814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:18,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:18,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:51:18,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016889834] [2022-11-03 02:51:18,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:18,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:18,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:18,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:18,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:18,578 INFO L87 Difference]: Start difference. First operand 15866 states and 22862 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:51:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:19,867 INFO L93 Difference]: Finished difference Result 38096 states and 55920 transitions. [2022-11-03 02:51:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:19,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 135 [2022-11-03 02:51:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:19,981 INFO L225 Difference]: With dead ends: 38096 [2022-11-03 02:51:19,981 INFO L226 Difference]: Without dead ends: 22237 [2022-11-03 02:51:20,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:20,033 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 65 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:20,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 281 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22237 states. [2022-11-03 02:51:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22237 to 18330. [2022-11-03 02:51:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18330 states, 15499 states have (on average 1.448028905090651) internal successors, (22443), 15565 states have internal predecessors, (22443), 1713 states have call successors, (1713), 1117 states have call predecessors, (1713), 1117 states have return successors, (2618), 1648 states have call predecessors, (2618), 1713 states have call successors, (2618) [2022-11-03 02:51:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18330 states to 18330 states and 26774 transitions. [2022-11-03 02:51:21,283 INFO L78 Accepts]: Start accepts. Automaton has 18330 states and 26774 transitions. Word has length 135 [2022-11-03 02:51:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:21,283 INFO L495 AbstractCegarLoop]: Abstraction has 18330 states and 26774 transitions. [2022-11-03 02:51:21,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:51:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 18330 states and 26774 transitions. [2022-11-03 02:51:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 02:51:21,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:21,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:21,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:21,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:51:21,527 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1345769890, now seen corresponding path program 1 times [2022-11-03 02:51:21,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:21,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868891868] [2022-11-03 02:51:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:21,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:51:21,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:21,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868891868] [2022-11-03 02:51:21,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868891868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:21,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655606764] [2022-11-03 02:51:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:21,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:21,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:21,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:21,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:51:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:22,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:51:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:51:22,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:22,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655606764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:22,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:22,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 02:51:22,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991339762] [2022-11-03 02:51:22,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:22,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:22,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:22,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:22,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:22,156 INFO L87 Difference]: Start difference. First operand 18330 states and 26774 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:51:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:24,575 INFO L93 Difference]: Finished difference Result 54570 states and 79637 transitions. [2022-11-03 02:51:24,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:24,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 136 [2022-11-03 02:51:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:24,746 INFO L225 Difference]: With dead ends: 54570 [2022-11-03 02:51:24,747 INFO L226 Difference]: Without dead ends: 36247 [2022-11-03 02:51:24,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:51:24,805 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 148 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:24,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 639 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36247 states. [2022-11-03 02:51:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36247 to 36209. [2022-11-03 02:51:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36209 states, 30558 states have (on average 1.4251587145755613) internal successors, (43550), 30721 states have internal predecessors, (43550), 3387 states have call successors, (3387), 2231 states have call predecessors, (3387), 2263 states have return successors, (5564), 3257 states have call predecessors, (5564), 3387 states have call successors, (5564) [2022-11-03 02:51:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36209 states to 36209 states and 52501 transitions. [2022-11-03 02:51:28,215 INFO L78 Accepts]: Start accepts. Automaton has 36209 states and 52501 transitions. Word has length 136 [2022-11-03 02:51:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:28,216 INFO L495 AbstractCegarLoop]: Abstraction has 36209 states and 52501 transitions. [2022-11-03 02:51:28,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:51:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 36209 states and 52501 transitions. [2022-11-03 02:51:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 02:51:28,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:28,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:28,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:28,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:51:28,494 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:28,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:28,494 INFO L85 PathProgramCache]: Analyzing trace with hash -503796263, now seen corresponding path program 1 times [2022-11-03 02:51:28,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:28,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47944059] [2022-11-03 02:51:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:28,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:51:29,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47944059] [2022-11-03 02:51:29,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47944059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:29,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642247525] [2022-11-03 02:51:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:29,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:29,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:29,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:29,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:51:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:51:29,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:29,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642247525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:29,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:29,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:51:29,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783585016] [2022-11-03 02:51:29,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:29,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:51:29,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:51:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:51:29,365 INFO L87 Difference]: Start difference. First operand 36209 states and 52501 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:51:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:33,356 INFO L93 Difference]: Finished difference Result 89321 states and 129317 transitions. [2022-11-03 02:51:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:51:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-03 02:51:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:33,660 INFO L225 Difference]: With dead ends: 89321 [2022-11-03 02:51:33,661 INFO L226 Difference]: Without dead ends: 53119 [2022-11-03 02:51:33,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:51:33,790 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 511 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:33,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 302 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:51:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53119 states. [2022-11-03 02:51:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53119 to 53117. [2022-11-03 02:51:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53117 states, 44714 states have (on average 1.4073891845954287) internal successors, (62930), 44957 states have internal predecessors, (62930), 5015 states have call successors, (5015), 3339 states have call predecessors, (5015), 3387 states have return successors, (8209), 4821 states have call predecessors, (8209), 5015 states have call successors, (8209) [2022-11-03 02:51:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53117 states to 53117 states and 76154 transitions. [2022-11-03 02:51:38,466 INFO L78 Accepts]: Start accepts. Automaton has 53117 states and 76154 transitions. Word has length 136 [2022-11-03 02:51:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:38,467 INFO L495 AbstractCegarLoop]: Abstraction has 53117 states and 76154 transitions. [2022-11-03 02:51:38,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:51:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 53117 states and 76154 transitions. [2022-11-03 02:51:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:51:38,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:38,552 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:38,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:38,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:51:38,766 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:38,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:38,767 INFO L85 PathProgramCache]: Analyzing trace with hash -126412394, now seen corresponding path program 1 times [2022-11-03 02:51:38,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:38,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176950672] [2022-11-03 02:51:38,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:38,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 02:51:38,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:38,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176950672] [2022-11-03 02:51:38,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176950672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:38,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549773275] [2022-11-03 02:51:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:38,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:38,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:38,919 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:38,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfaed80-8b55-4025-93bb-69009476bbe5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:51:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:39,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:51:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:51:39,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:39,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549773275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:39,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:39,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:51:39,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146129461] [2022-11-03 02:51:39,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:39,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:39,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:51:39,179 INFO L87 Difference]: Start difference. First operand 53117 states and 76154 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)