./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 13:52:35,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:52:35,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:52:35,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:52:35,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:52:35,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:52:35,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:52:35,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:52:35,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:52:35,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:52:35,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:52:35,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:52:35,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:52:35,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:52:36,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:52:36,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:52:36,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:52:36,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:52:36,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:52:36,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:52:36,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:52:36,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:52:36,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:52:36,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:52:36,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:52:36,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:52:36,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:52:36,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:52:36,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:52:36,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:52:36,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:52:36,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:52:36,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:52:36,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:52:36,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:52:36,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:52:36,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:52:36,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:52:36,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:52:36,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:52:36,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:52:36,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:52:36,073 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:52:36,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:52:36,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:52:36,075 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:52:36,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:52:36,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:52:36,076 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:52:36,076 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:52:36,077 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:52:36,077 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:52:36,078 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:52:36,078 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:52:36,078 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:52:36,078 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:52:36,079 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:52:36,079 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:52:36,079 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:52:36,079 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:52:36,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:52:36,080 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:52:36,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:52:36,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:52:36,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:52:36,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:52:36,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:52:36,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:52:36,082 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:52:36,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:52:36,082 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:52:36,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:52:36,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:52:36,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:52:36,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:52:36,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:52:36,084 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:52:36,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:52:36,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:52:36,085 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:52:36,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:52:36,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:52:36,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:52:36,086 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_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 [2022-11-23 13:52:36,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:52:36,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:52:36,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:52:36,424 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:52:36,425 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:52:36,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2022-11-23 13:52:39,614 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:52:39,923 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:52:39,924 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2022-11-23 13:52:39,946 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/data/60e8c829b/c0f333f110b14a26a830290ab941465b/FLAG1378b8696 [2022-11-23 13:52:39,965 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/data/60e8c829b/c0f333f110b14a26a830290ab941465b [2022-11-23 13:52:39,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:52:39,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:52:39,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:52:39,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:52:39,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:52:39,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:39" (1/1) ... [2022-11-23 13:52:39,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d27922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:39, skipping insertion in model container [2022-11-23 13:52:39,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:39" (1/1) ... [2022-11-23 13:52:39,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:52:40,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:52:40,191 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2022-11-23 13:52:40,253 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2022-11-23 13:52:40,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:52:40,417 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:52:40,429 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2022-11-23 13:52:40,449 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2022-11-23 13:52:40,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:52:40,573 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:52:40,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40 WrapperNode [2022-11-23 13:52:40,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:52:40,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:52:40,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:52:40,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:52:40,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,670 INFO L138 Inliner]: procedures = 79, calls = 96, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1098 [2022-11-23 13:52:40,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:52:40,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:52:40,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:52:40,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:52:40,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,732 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:52:40,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:52:40,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:52:40,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:52:40,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (1/1) ... [2022-11-23 13:52:40,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:52:40,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:40,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:52:40,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:52:40,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:52:40,846 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 13:52:40,847 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 13:52:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-23 13:52:40,847 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-23 13:52:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 13:52:40,847 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 13:52:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 13:52:40,847 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 13:52:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-23 13:52:40,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-23 13:52:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 13:52:40,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 13:52:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 13:52:40,848 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 13:52:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-23 13:52:40,849 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-23 13:52:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-23 13:52:40,849 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-23 13:52:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-23 13:52:40,849 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-23 13:52:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 13:52:40,849 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 13:52:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:52:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 13:52:40,850 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 13:52:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-23 13:52:40,850 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-23 13:52:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:52:40,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:52:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 13:52:40,851 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 13:52:40,996 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:52:41,005 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:52:42,117 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:52:42,741 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:52:42,741 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-23 13:52:42,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:42 BoogieIcfgContainer [2022-11-23 13:52:42,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:52:42,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:52:42,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:52:42,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:52:42,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:52:39" (1/3) ... [2022-11-23 13:52:42,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76799618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:42, skipping insertion in model container [2022-11-23 13:52:42,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:40" (2/3) ... [2022-11-23 13:52:42,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76799618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:42, skipping insertion in model container [2022-11-23 13:52:42,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:42" (3/3) ... [2022-11-23 13:52:42,760 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2022-11-23 13:52:42,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:52:42,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 13:52:42,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:52:42,849 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;@13c60d5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:52:42,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 13:52:42,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 271 states, 213 states have (on average 1.5446009389671362) internal successors, (329), 219 states have internal predecessors, (329), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-23 13:52:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 13:52:42,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:42,866 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] [2022-11-23 13:52:42,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:42,871 INFO L85 PathProgramCache]: Analyzing trace with hash -947464076, now seen corresponding path program 1 times [2022-11-23 13:52:42,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:42,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949509486] [2022-11-23 13:52:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:42,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:43,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:43,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949509486] [2022-11-23 13:52:43,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949509486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:43,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:43,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:52:43,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49800519] [2022-11-23 13:52:43,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:43,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:52:43,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:52:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:52:43,347 INFO L87 Difference]: Start difference. First operand has 271 states, 213 states have (on average 1.5446009389671362) internal successors, (329), 219 states have internal predecessors, (329), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-11-23 13:52:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:43,999 INFO L93 Difference]: Finished difference Result 593 states and 893 transitions. [2022-11-23 13:52:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:52:44,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2022-11-23 13:52:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:44,022 INFO L225 Difference]: With dead ends: 593 [2022-11-23 13:52:44,025 INFO L226 Difference]: Without dead ends: 326 [2022-11-23 13:52:44,035 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 [2022-11-23 13:52:44,041 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 459 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:44,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 676 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:52:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-23 13:52:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 319. [2022-11-23 13:52:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 252 states have internal predecessors, (362), 49 states have call successors, (49), 21 states have call predecessors, (49), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-23 13:52:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 458 transitions. [2022-11-23 13:52:44,125 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 458 transitions. Word has length 45 [2022-11-23 13:52:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:44,126 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 458 transitions. [2022-11-23 13:52:44,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-11-23 13:52:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 458 transitions. [2022-11-23 13:52:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 13:52:44,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:44,129 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] [2022-11-23 13:52:44,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:52:44,130 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash -28489453, now seen corresponding path program 1 times [2022-11-23 13:52:44,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:44,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411004766] [2022-11-23 13:52:44,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:44,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:44,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:44,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411004766] [2022-11-23 13:52:44,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411004766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:44,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:44,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:52:44,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525022190] [2022-11-23 13:52:44,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:44,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:52:44,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:52:44,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:52:44,264 INFO L87 Difference]: Start difference. First operand 319 states and 458 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) [2022-11-23 13:52:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:45,125 INFO L93 Difference]: Finished difference Result 721 states and 961 transitions. [2022-11-23 13:52:45,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:52:45,127 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 [2022-11-23 13:52:45,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:45,135 INFO L225 Difference]: With dead ends: 721 [2022-11-23 13:52:45,136 INFO L226 Difference]: Without dead ends: 589 [2022-11-23 13:52:45,138 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 [2022-11-23 13:52:45,140 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 940 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:45,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 1189 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:52:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-23 13:52:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 505. [2022-11-23 13:52:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 380 states have (on average 1.3736842105263158) internal successors, (522), 385 states have internal predecessors, (522), 76 states have call successors, (76), 44 states have call predecessors, (76), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2022-11-23 13:52:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 676 transitions. [2022-11-23 13:52:45,230 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 676 transitions. Word has length 45 [2022-11-23 13:52:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:45,230 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 676 transitions. [2022-11-23 13:52:45,231 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) [2022-11-23 13:52:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 676 transitions. [2022-11-23 13:52:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 13:52:45,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:45,241 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] [2022-11-23 13:52:45,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:52:45,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 760138508, now seen corresponding path program 1 times [2022-11-23 13:52:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:45,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587121514] [2022-11-23 13:52:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:45,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:45,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587121514] [2022-11-23 13:52:45,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587121514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:45,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:45,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:52:45,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437003371] [2022-11-23 13:52:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:45,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:52:45,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:45,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:52:45,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:52:45,593 INFO L87 Difference]: Start difference. First operand 505 states and 676 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) [2022-11-23 13:52:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:46,691 INFO L93 Difference]: Finished difference Result 1021 states and 1292 transitions. [2022-11-23 13:52:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:52:46,692 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 [2022-11-23 13:52:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:46,702 INFO L225 Difference]: With dead ends: 1021 [2022-11-23 13:52:46,702 INFO L226 Difference]: Without dead ends: 719 [2022-11-23 13:52:46,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:52:46,712 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 557 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:46,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1001 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 13:52:46,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-11-23 13:52:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 684. [2022-11-23 13:52:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 505 states have (on average 1.3346534653465347) internal successors, (674), 511 states have internal predecessors, (674), 103 states have call successors, (103), 67 states have call predecessors, (103), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2022-11-23 13:52:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 886 transitions. [2022-11-23 13:52:46,823 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 886 transitions. Word has length 46 [2022-11-23 13:52:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:46,824 INFO L495 AbstractCegarLoop]: Abstraction has 684 states and 886 transitions. [2022-11-23 13:52:46,824 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) [2022-11-23 13:52:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 886 transitions. [2022-11-23 13:52:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 13:52:46,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:46,828 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] [2022-11-23 13:52:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:52:46,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1523051311, now seen corresponding path program 1 times [2022-11-23 13:52:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:46,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513981199] [2022-11-23 13:52:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:46,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:46,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:46,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513981199] [2022-11-23 13:52:46,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513981199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:46,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:46,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:52:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808669214] [2022-11-23 13:52:46,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:46,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:52:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:52:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:52:46,912 INFO L87 Difference]: Start difference. First operand 684 states and 886 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) [2022-11-23 13:52:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:47,126 INFO L93 Difference]: Finished difference Result 1248 states and 1556 transitions. [2022-11-23 13:52:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:52:47,127 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 [2022-11-23 13:52:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:47,132 INFO L225 Difference]: With dead ends: 1248 [2022-11-23 13:52:47,132 INFO L226 Difference]: Without dead ends: 816 [2022-11-23 13:52:47,136 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 [2022-11-23 13:52:47,141 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 67 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:47,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 650 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:52:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-11-23 13:52:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 711. [2022-11-23 13:52:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 528 states have (on average 1.3238636363636365) internal successors, (699), 534 states have internal predecessors, (699), 105 states have call successors, (105), 69 states have call predecessors, (105), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2022-11-23 13:52:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 915 transitions. [2022-11-23 13:52:47,221 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 915 transitions. Word has length 47 [2022-11-23 13:52:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:47,221 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 915 transitions. [2022-11-23 13:52:47,221 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) [2022-11-23 13:52:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 915 transitions. [2022-11-23 13:52:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 13:52:47,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:47,223 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:47,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:52:47,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:47,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash -136623882, now seen corresponding path program 1 times [2022-11-23 13:52:47,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:47,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901815069] [2022-11-23 13:52:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:52:47,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:47,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901815069] [2022-11-23 13:52:47,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901815069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:47,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:47,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:52:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701577816] [2022-11-23 13:52:47,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:47,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:52:47,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:47,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:52:47,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:52:47,302 INFO L87 Difference]: Start difference. First operand 711 states and 915 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-11-23 13:52:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:47,483 INFO L93 Difference]: Finished difference Result 901 states and 1136 transitions. [2022-11-23 13:52:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:52:47,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 53 [2022-11-23 13:52:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:47,487 INFO L225 Difference]: With dead ends: 901 [2022-11-23 13:52:47,487 INFO L226 Difference]: Without dead ends: 628 [2022-11-23 13:52:47,488 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 [2022-11-23 13:52:47,489 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 364 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:47,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 403 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:52:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-23 13:52:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 519. [2022-11-23 13:52:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 388 states have (on average 1.3324742268041236) internal successors, (517), 392 states have internal predecessors, (517), 81 states have call successors, (81), 49 states have call predecessors, (81), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-23 13:52:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 677 transitions. [2022-11-23 13:52:47,538 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 677 transitions. Word has length 53 [2022-11-23 13:52:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:47,538 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 677 transitions. [2022-11-23 13:52:47,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-11-23 13:52:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 677 transitions. [2022-11-23 13:52:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 13:52:47,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:47,540 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:47,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:52:47,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1064154026, now seen corresponding path program 1 times [2022-11-23 13:52:47,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:47,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687459146] [2022-11-23 13:52:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:47,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:47,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:47,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687459146] [2022-11-23 13:52:47,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687459146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:47,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:47,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:52:47,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257237076] [2022-11-23 13:52:47,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:47,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:52:47,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:47,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:52:47,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:52:47,625 INFO L87 Difference]: Start difference. First operand 519 states and 677 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 13:52:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:47,980 INFO L93 Difference]: Finished difference Result 622 states and 793 transitions. [2022-11-23 13:52:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:52:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-23 13:52:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:47,984 INFO L225 Difference]: With dead ends: 622 [2022-11-23 13:52:47,984 INFO L226 Difference]: Without dead ends: 619 [2022-11-23 13:52:47,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:52:47,986 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 661 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:47,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 379 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:52:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-11-23 13:52:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 518. [2022-11-23 13:52:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 388 states have (on average 1.324742268041237) internal successors, (514), 391 states have internal predecessors, (514), 80 states have call successors, (80), 49 states have call predecessors, (80), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-23 13:52:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 673 transitions. [2022-11-23 13:52:48,045 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 673 transitions. Word has length 54 [2022-11-23 13:52:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:48,045 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 673 transitions. [2022-11-23 13:52:48,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 13:52:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 673 transitions. [2022-11-23 13:52:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 13:52:48,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:48,047 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:48,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:52:48,047 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1372470726, now seen corresponding path program 1 times [2022-11-23 13:52:48,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:48,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324656091] [2022-11-23 13:52:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:48,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:48,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:48,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324656091] [2022-11-23 13:52:48,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324656091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:52:48,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47171552] [2022-11-23 13:52:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:48,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:52:48,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:48,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:52:48,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:52:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:52:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:48,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:49,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47171552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:49,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340348362] [2022-11-23 13:52:49,041 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 13:52:49,041 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:52:49,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:52:49,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:52:49,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:52:57,204 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 215 for LOIs [2022-11-23 13:52:57,238 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2022-11-23 13:52:57,267 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 211 for LOIs [2022-11-23 13:52:57,305 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 219 for LOIs [2022-11-23 13:52:58,381 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2022-11-23 13:52:58,506 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 215 for LOIs [2022-11-23 13:52:58,609 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 215 for LOIs [2022-11-23 13:52:58,640 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 222 for LOIs [2022-11-23 13:52:58,670 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:53:33,656 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12812#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 13:53:33,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:53:33,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:53:33,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 13:53:33,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96542343] [2022-11-23 13:53:33,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:53:33,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:53:33,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:53:33,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 13:53:33,661 INFO L87 Difference]: Start difference. First operand 518 states and 673 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 13:53:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:34,372 INFO L93 Difference]: Finished difference Result 1091 states and 1328 transitions. [2022-11-23 13:53:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:53:34,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-23 13:53:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:34,378 INFO L225 Difference]: With dead ends: 1091 [2022-11-23 13:53:34,378 INFO L226 Difference]: Without dead ends: 1088 [2022-11-23 13:53:34,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 13:53:34,380 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 622 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:34,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1194 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:53:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-11-23 13:53:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 813. [2022-11-23 13:53:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 593 states have (on average 1.2765598650927488) internal successors, (757), 596 states have internal predecessors, (757), 128 states have call successors, (128), 91 states have call predecessors, (128), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-23 13:53:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1012 transitions. [2022-11-23 13:53:34,487 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1012 transitions. Word has length 55 [2022-11-23 13:53:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:34,487 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1012 transitions. [2022-11-23 13:53:34,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 13:53:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1012 transitions. [2022-11-23 13:53:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 13:53:34,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:34,489 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:34,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:34,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 13:53:34,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash -881651158, now seen corresponding path program 2 times [2022-11-23 13:53:34,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:34,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358707377] [2022-11-23 13:53:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:34,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:34,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358707377] [2022-11-23 13:53:34,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358707377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:34,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:34,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:53:34,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067512062] [2022-11-23 13:53:34,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:34,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:53:34,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:34,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:53:34,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:34,763 INFO L87 Difference]: Start difference. First operand 813 states and 1012 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 13:53:34,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:34,980 INFO L93 Difference]: Finished difference Result 1226 states and 1485 transitions. [2022-11-23 13:53:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:53:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-23 13:53:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:34,984 INFO L225 Difference]: With dead ends: 1226 [2022-11-23 13:53:34,984 INFO L226 Difference]: Without dead ends: 815 [2022-11-23 13:53:34,986 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 [2022-11-23 13:53:34,986 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 367 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:34,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 436 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:53:34,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-23 13:53:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 809. [2022-11-23 13:53:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 589 states have (on average 1.2648556876061121) internal successors, (745), 592 states have internal predecessors, (745), 128 states have call successors, (128), 91 states have call predecessors, (128), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-23 13:53:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1000 transitions. [2022-11-23 13:53:35,085 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1000 transitions. Word has length 58 [2022-11-23 13:53:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:35,086 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1000 transitions. [2022-11-23 13:53:35,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 13:53:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1000 transitions. [2022-11-23 13:53:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 13:53:35,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:35,087 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 13:53:35,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:53:35,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1129514012, now seen corresponding path program 1 times [2022-11-23 13:53:35,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:35,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139420255] [2022-11-23 13:53:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:35,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:53:35,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:35,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139420255] [2022-11-23 13:53:35,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139420255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:35,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:35,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:53:35,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205556787] [2022-11-23 13:53:35,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:35,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:53:35,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:35,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:53:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:35,152 INFO L87 Difference]: Start difference. First operand 809 states and 1000 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:53:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:35,400 INFO L93 Difference]: Finished difference Result 1428 states and 1710 transitions. [2022-11-23 13:53:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:53:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-23 13:53:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:35,406 INFO L225 Difference]: With dead ends: 1428 [2022-11-23 13:53:35,406 INFO L226 Difference]: Without dead ends: 1065 [2022-11-23 13:53:35,407 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 [2022-11-23 13:53:35,408 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 42 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:35,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 686 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:53:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-11-23 13:53:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 884. [2022-11-23 13:53:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 650 states have (on average 1.2615384615384615) internal successors, (820), 653 states have internal predecessors, (820), 135 states have call successors, (135), 98 states have call predecessors, (135), 97 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-23 13:53:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1089 transitions. [2022-11-23 13:53:35,536 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1089 transitions. Word has length 61 [2022-11-23 13:53:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:35,536 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1089 transitions. [2022-11-23 13:53:35,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:53:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1089 transitions. [2022-11-23 13:53:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 13:53:35,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:35,538 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:35,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:53:35,539 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash -82655851, now seen corresponding path program 1 times [2022-11-23 13:53:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:35,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744453551] [2022-11-23 13:53:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:53:35,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:35,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744453551] [2022-11-23 13:53:35,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744453551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:35,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:35,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:53:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405147252] [2022-11-23 13:53:35,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:35,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:53:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:53:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:53:35,738 INFO L87 Difference]: Start difference. First operand 884 states and 1089 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:53:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:36,801 INFO L93 Difference]: Finished difference Result 1933 states and 2272 transitions. [2022-11-23 13:53:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:53:36,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-23 13:53:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:36,808 INFO L225 Difference]: With dead ends: 1933 [2022-11-23 13:53:36,808 INFO L226 Difference]: Without dead ends: 1252 [2022-11-23 13:53:36,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:53:36,811 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 539 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:36,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 985 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 13:53:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-11-23 13:53:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1203. [2022-11-23 13:53:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 864 states have (on average 1.2222222222222223) internal successors, (1056), 867 states have internal predecessors, (1056), 191 states have call successors, (191), 147 states have call predecessors, (191), 146 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-11-23 13:53:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1437 transitions. [2022-11-23 13:53:37,014 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1437 transitions. Word has length 70 [2022-11-23 13:53:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:37,016 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1437 transitions. [2022-11-23 13:53:37,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:53:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1437 transitions. [2022-11-23 13:53:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 13:53:37,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:37,024 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 13:53:37,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 13:53:37,024 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash 382709149, now seen corresponding path program 1 times [2022-11-23 13:53:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:37,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050955178] [2022-11-23 13:53:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:37,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:53:37,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:37,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050955178] [2022-11-23 13:53:37,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050955178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:37,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:37,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:53:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841617123] [2022-11-23 13:53:37,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:37,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:53:37,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:53:37,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:37,103 INFO L87 Difference]: Start difference. First operand 1203 states and 1437 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:53:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:37,417 INFO L93 Difference]: Finished difference Result 2169 states and 2531 transitions. [2022-11-23 13:53:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:53:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-23 13:53:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:37,424 INFO L225 Difference]: With dead ends: 2169 [2022-11-23 13:53:37,424 INFO L226 Difference]: Without dead ends: 1379 [2022-11-23 13:53:37,426 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 [2022-11-23 13:53:37,427 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 37 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:37,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 680 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:53:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-11-23 13:53:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1250. [2022-11-23 13:53:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 903 states have (on average 1.2203765227021042) internal successors, (1102), 906 states have internal predecessors, (1102), 195 states have call successors, (195), 151 states have call predecessors, (195), 150 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2022-11-23 13:53:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1491 transitions. [2022-11-23 13:53:37,605 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1491 transitions. Word has length 71 [2022-11-23 13:53:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:37,606 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 1491 transitions. [2022-11-23 13:53:37,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:53:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1491 transitions. [2022-11-23 13:53:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 13:53:37,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:37,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:37,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 13:53:37,608 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1400150431, now seen corresponding path program 1 times [2022-11-23 13:53:37,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:37,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861160105] [2022-11-23 13:53:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:37,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:37,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:37,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861160105] [2022-11-23 13:53:37,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861160105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:37,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:37,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:53:37,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277992446] [2022-11-23 13:53:37,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:37,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:53:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:53:37,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:53:37,739 INFO L87 Difference]: Start difference. First operand 1250 states and 1491 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2022-11-23 13:53:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:39,053 INFO L93 Difference]: Finished difference Result 2183 states and 3047 transitions. [2022-11-23 13:53:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:53:39,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2022-11-23 13:53:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:39,064 INFO L225 Difference]: With dead ends: 2183 [2022-11-23 13:53:39,064 INFO L226 Difference]: Without dead ends: 1991 [2022-11-23 13:53:39,067 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 [2022-11-23 13:53:39,068 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 1545 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:39,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1563 Valid, 1532 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 13:53:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-11-23 13:53:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1980. [2022-11-23 13:53:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1520 states have (on average 1.3473684210526315) internal successors, (2048), 1526 states have internal predecessors, (2048), 284 states have call successors, (284), 175 states have call predecessors, (284), 174 states have return successors, (349), 280 states have call predecessors, (349), 283 states have call successors, (349) [2022-11-23 13:53:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2681 transitions. [2022-11-23 13:53:39,370 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2681 transitions. Word has length 70 [2022-11-23 13:53:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:39,371 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 2681 transitions. [2022-11-23 13:53:39,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2022-11-23 13:53:39,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2681 transitions. [2022-11-23 13:53:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 13:53:39,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:39,374 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:39,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 13:53:39,374 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash -878491124, now seen corresponding path program 1 times [2022-11-23 13:53:39,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:39,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373545937] [2022-11-23 13:53:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:39,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 13:53:39,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:39,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373545937] [2022-11-23 13:53:39,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373545937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:39,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162591628] [2022-11-23 13:53:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:39,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:39,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:39,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:39,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:53:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:39,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:53:39,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:53:39,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:53:39,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162591628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:39,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:53:39,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-23 13:53:39,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808249020] [2022-11-23 13:53:39,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:39,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:53:39,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:53:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:53:39,998 INFO L87 Difference]: Start difference. First operand 1980 states and 2681 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:53:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:40,522 INFO L93 Difference]: Finished difference Result 2844 states and 3686 transitions. [2022-11-23 13:53:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 13:53:40,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 13:53:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:40,531 INFO L225 Difference]: With dead ends: 2844 [2022-11-23 13:53:40,532 INFO L226 Difference]: Without dead ends: 1797 [2022-11-23 13:53:40,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:53:40,535 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 362 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:40,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1476 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:53:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-11-23 13:53:40,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1612. [2022-11-23 13:53:40,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1283 states have (on average 1.3858144972720188) internal successors, (1778), 1289 states have internal predecessors, (1778), 213 states have call successors, (213), 115 states have call predecessors, (213), 114 states have return successors, (278), 209 states have call predecessors, (278), 212 states have call successors, (278) [2022-11-23 13:53:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2269 transitions. [2022-11-23 13:53:40,771 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2269 transitions. Word has length 102 [2022-11-23 13:53:40,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:40,771 INFO L495 AbstractCegarLoop]: Abstraction has 1612 states and 2269 transitions. [2022-11-23 13:53:40,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:53:40,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2269 transitions. [2022-11-23 13:53:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 13:53:40,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:40,775 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:40,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:40,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 13:53:40,988 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash 649275307, now seen corresponding path program 1 times [2022-11-23 13:53:40,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:40,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378208556] [2022-11-23 13:53:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:40,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 13:53:41,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:41,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378208556] [2022-11-23 13:53:41,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378208556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:41,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788454608] [2022-11-23 13:53:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:41,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:41,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:41,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:41,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:53:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:41,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:53:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:53:41,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:53:41,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788454608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:41,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:53:41,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 13:53:41,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708382044] [2022-11-23 13:53:41,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:41,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:53:41,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:53:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 13:53:41,511 INFO L87 Difference]: Start difference. First operand 1612 states and 2269 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:53:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:41,985 INFO L93 Difference]: Finished difference Result 2161 states and 2894 transitions. [2022-11-23 13:53:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:53:41,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-23 13:53:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:41,994 INFO L225 Difference]: With dead ends: 2161 [2022-11-23 13:53:41,994 INFO L226 Difference]: Without dead ends: 1568 [2022-11-23 13:53:41,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:53:41,997 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 71 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:41,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1480 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:53:42,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2022-11-23 13:53:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1476. [2022-11-23 13:53:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1183 states have (on average 1.404057480980558) internal successors, (1661), 1189 states have internal predecessors, (1661), 194 states have call successors, (194), 98 states have call predecessors, (194), 97 states have return successors, (259), 190 states have call predecessors, (259), 193 states have call successors, (259) [2022-11-23 13:53:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 2114 transitions. [2022-11-23 13:53:42,211 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 2114 transitions. Word has length 112 [2022-11-23 13:53:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:42,211 INFO L495 AbstractCegarLoop]: Abstraction has 1476 states and 2114 transitions. [2022-11-23 13:53:42,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:53:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 2114 transitions. [2022-11-23 13:53:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 13:53:42,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:42,215 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:42,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:42,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:42,422 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:42,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1252246641, now seen corresponding path program 1 times [2022-11-23 13:53:42,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:42,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249541306] [2022-11-23 13:53:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:42,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 13:53:42,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:42,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249541306] [2022-11-23 13:53:42,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249541306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:42,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171224446] [2022-11-23 13:53:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:42,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:42,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:42,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:42,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:53:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:42,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:53:42,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:53:42,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:53:42,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171224446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:42,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:53:42,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-23 13:53:42,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492389082] [2022-11-23 13:53:42,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:42,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:53:42,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:42,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:53:42,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:53:42,894 INFO L87 Difference]: Start difference. First operand 1476 states and 2114 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:53:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:43,354 INFO L93 Difference]: Finished difference Result 2225 states and 2959 transitions. [2022-11-23 13:53:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:53:43,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-23 13:53:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:43,364 INFO L225 Difference]: With dead ends: 2225 [2022-11-23 13:53:43,365 INFO L226 Difference]: Without dead ends: 1768 [2022-11-23 13:53:43,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:53:43,367 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 347 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:43,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1494 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:53:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2022-11-23 13:53:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1734. [2022-11-23 13:53:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1345 states have (on average 1.3687732342007435) internal successors, (1841), 1357 states have internal predecessors, (1841), 242 states have call successors, (242), 140 states have call predecessors, (242), 145 states have return successors, (319), 238 states have call predecessors, (319), 241 states have call successors, (319) [2022-11-23 13:53:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2402 transitions. [2022-11-23 13:53:43,668 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2402 transitions. Word has length 113 [2022-11-23 13:53:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:43,668 INFO L495 AbstractCegarLoop]: Abstraction has 1734 states and 2402 transitions. [2022-11-23 13:53:43,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:53:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2402 transitions. [2022-11-23 13:53:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 13:53:43,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:43,672 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:43,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:43,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 13:53:43,878 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:43,878 INFO L85 PathProgramCache]: Analyzing trace with hash 963654932, now seen corresponding path program 1 times [2022-11-23 13:53:43,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:43,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4372289] [2022-11-23 13:53:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:43,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:53:44,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:44,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4372289] [2022-11-23 13:53:44,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4372289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:44,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646369440] [2022-11-23 13:53:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:44,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:44,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:44,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:44,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:53:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:44,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 13:53:44,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:53:45,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 13:53:47,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646369440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:47,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1260584260] [2022-11-23 13:53:47,939 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-23 13:53:47,939 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:53:47,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:53:47,940 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:53:47,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:55:24,558 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-11-23 13:55:25,579 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 343 for LOIs [2022-11-23 13:55:25,730 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 334 for LOIs [2022-11-23 13:55:25,886 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-11-23 13:55:30,621 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-11-23 13:55:31,192 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 168 for LOIs [2022-11-23 13:55:31,727 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-11-23 13:55:33,313 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-11-23 13:55:34,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:56:41,006 WARN L233 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 368 DAG size of output: 284 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:51,320 WARN L233 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 374 DAG size of output: 287 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:59,651 WARN L233 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 380 DAG size of output: 293 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:57:08,048 WARN L233 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 382 DAG size of output: 295 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:57:45,111 WARN L233 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 384 DAG size of output: 297 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:57:48,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56553#(and (<= 0 ~t5_pc~0) (<= 0 ~t6_i~0) (<= ~t5_st~0 0) (<= 2 ~T6_E~0) (<= 0 |#NULL.base|) (<= ~T13_E~0 2) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 0 ~t13_i~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= 2 ~E_13~0) (= ~t7_i~0 0) (<= 0 ~t5_st~0) (<= ~t12_i~0 0) (<= ~T6_E~0 2) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= 0 ~t13_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 2 ~T13_E~0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= ~t13_pc~0 0) (<= 0 ~t13_pc~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~E_13~0 2) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= ~t5_pc~0 0) (<= 2 ~E_5~0) (<= ~t6_i~0 0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t13_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (<= ~T12_E~0 2) (<= ~t13_i~0 0))' at error location [2022-11-23 13:57:48,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:57:48,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:57:48,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-23 13:57:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014781247] [2022-11-23 13:57:48,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 13:57:48,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:48,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 13:57:48,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=10150, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 13:57:48,134 INFO L87 Difference]: Start difference. First operand 1734 states and 2402 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 13:58:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:13,902 INFO L93 Difference]: Finished difference Result 4024 states and 5056 transitions. [2022-11-23 13:58:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-23 13:58:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-23 13:58:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:13,928 INFO L225 Difference]: With dead ends: 4024 [2022-11-23 13:58:13,928 INFO L226 Difference]: Without dead ends: 3309 [2022-11-23 13:58:13,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40605 ImplicationChecksByTransitivity, 153.6s TimeCoverageRelationStatistics Valid=9166, Invalid=89744, Unknown=0, NotChecked=0, Total=98910 [2022-11-23 13:58:13,951 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 6253 mSDsluCounter, 3666 mSDsCounter, 0 mSdLazyCounter, 8169 mSolverCounterSat, 2828 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6257 SdHoareTripleChecker+Valid, 3935 SdHoareTripleChecker+Invalid, 10997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2828 IncrementalHoareTripleChecker+Valid, 8169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:13,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6257 Valid, 3935 Invalid, 10997 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2828 Valid, 8169 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-23 13:58:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2022-11-23 13:58:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 2010. [2022-11-23 13:58:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1529 states have (on average 1.342053629823414) internal successors, (2052), 1543 states have internal predecessors, (2052), 287 states have call successors, (287), 177 states have call predecessors, (287), 192 states have return successors, (376), 291 states have call predecessors, (376), 286 states have call successors, (376) [2022-11-23 13:58:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 2715 transitions. [2022-11-23 13:58:14,290 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 2715 transitions. Word has length 114 [2022-11-23 13:58:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:14,290 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 2715 transitions. [2022-11-23 13:58:14,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 13:58:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 2715 transitions. [2022-11-23 13:58:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 13:58:14,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:14,294 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:14,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:14,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 13:58:14,501 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:14,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1862469236, now seen corresponding path program 1 times [2022-11-23 13:58:14,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:14,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953005873] [2022-11-23 13:58:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:14,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 13:58:14,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:14,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953005873] [2022-11-23 13:58:14,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953005873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:14,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802362267] [2022-11-23 13:58:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:14,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:14,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:14,950 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:14,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:58:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:58:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 13:58:15,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 13:58:15,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802362267] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:15,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 13:58:15,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-23 13:58:15,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180321735] [2022-11-23 13:58:15,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:15,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:58:15,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:58:15,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:58:15,455 INFO L87 Difference]: Start difference. First operand 2010 states and 2715 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 13:58:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:16,707 INFO L93 Difference]: Finished difference Result 3334 states and 4263 transitions. [2022-11-23 13:58:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 13:58:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-23 13:58:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:16,720 INFO L225 Difference]: With dead ends: 3334 [2022-11-23 13:58:16,720 INFO L226 Difference]: Without dead ends: 2343 [2022-11-23 13:58:16,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-23 13:58:16,724 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 563 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:16,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 769 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:58:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2022-11-23 13:58:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2090. [2022-11-23 13:58:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1574 states have (on average 1.3360864040660736) internal successors, (2103), 1591 states have internal predecessors, (2103), 306 states have call successors, (306), 186 states have call predecessors, (306), 208 states have return successors, (416), 314 states have call predecessors, (416), 305 states have call successors, (416) [2022-11-23 13:58:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 2825 transitions. [2022-11-23 13:58:17,208 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 2825 transitions. Word has length 115 [2022-11-23 13:58:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:17,208 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 2825 transitions. [2022-11-23 13:58:17,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 13:58:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 2825 transitions. [2022-11-23 13:58:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 13:58:17,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:17,213 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:17,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 13:58:17,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:17,432 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1657507565, now seen corresponding path program 1 times [2022-11-23 13:58:17,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:17,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597980581] [2022-11-23 13:58:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:17,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 13:58:18,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:18,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597980581] [2022-11-23 13:58:18,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597980581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:18,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048759861] [2022-11-23 13:58:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:18,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:18,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:18,275 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:18,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 13:58:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:18,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 13:58:18,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:58:19,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 13:58:21,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048759861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:21,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965629165] [2022-11-23 13:58:21,416 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-23 13:58:21,416 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:58:21,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:58:21,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:58:21,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:58:50,592 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-11-23 13:58:51,582 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 182 for LOIs [2022-11-23 13:58:51,614 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 170 for LOIs [2022-11-23 13:58:51,646 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-11-23 13:58:56,050 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-11-23 13:58:56,608 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 170 for LOIs [2022-11-23 13:58:57,142 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-11-23 13:58:58,483 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-11-23 13:59:00,107 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:00:52,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75142#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:00:52,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:00:52,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:00:52,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-23 14:00:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032276194] [2022-11-23 14:00:52,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:00:52,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 14:00:52,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:00:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 14:00:52,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=10050, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 14:00:52,842 INFO L87 Difference]: Start difference. First operand 2090 states and 2825 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 14:01:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:04,408 INFO L93 Difference]: Finished difference Result 4939 states and 6167 transitions. [2022-11-23 14:01:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-23 14:01:04,409 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-23 14:01:04,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:04,429 INFO L225 Difference]: With dead ends: 4939 [2022-11-23 14:01:04,429 INFO L226 Difference]: Without dead ends: 3868 [2022-11-23 14:01:04,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 312 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14493 ImplicationChecksByTransitivity, 119.6s TimeCoverageRelationStatistics Valid=3638, Invalid=31518, Unknown=0, NotChecked=0, Total=35156 [2022-11-23 14:01:04,438 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 5728 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 5952 mSolverCounterSat, 2791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5729 SdHoareTripleChecker+Valid, 3199 SdHoareTripleChecker+Invalid, 8743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2791 IncrementalHoareTripleChecker+Valid, 5952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:04,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5729 Valid, 3199 Invalid, 8743 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2791 Valid, 5952 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 14:01:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-11-23 14:01:04,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2627. [2022-11-23 14:01:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 1960 states have (on average 1.3020408163265307) internal successors, (2552), 1977 states have internal predecessors, (2552), 380 states have call successors, (380), 245 states have call predecessors, (380), 285 states have return successors, (508), 406 states have call predecessors, (508), 379 states have call successors, (508) [2022-11-23 14:01:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 3440 transitions. [2022-11-23 14:01:04,923 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 3440 transitions. Word has length 124 [2022-11-23 14:01:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:04,923 INFO L495 AbstractCegarLoop]: Abstraction has 2627 states and 3440 transitions. [2022-11-23 14:01:04,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 14:01:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 3440 transitions. [2022-11-23 14:01:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 14:01:04,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:04,927 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:01:04,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:05,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:01:05,134 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:01:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2044520811, now seen corresponding path program 1 times [2022-11-23 14:01:05,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:01:05,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087193014] [2022-11-23 14:01:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:05,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:01:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:01:05,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:01:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087193014] [2022-11-23 14:01:05,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087193014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:05,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369056406] [2022-11-23 14:01:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:05,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:05,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:05,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:05,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:01:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:05,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:01:05,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:01:05,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:01:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:01:05,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369056406] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:05,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:01:05,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-23 14:01:05,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188037952] [2022-11-23 14:01:05,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:01:05,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:01:05,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:01:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:01:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:01:05,903 INFO L87 Difference]: Start difference. First operand 2627 states and 3440 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:01:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:07,159 INFO L93 Difference]: Finished difference Result 3586 states and 4531 transitions. [2022-11-23 14:01:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:01:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-23 14:01:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:07,170 INFO L225 Difference]: With dead ends: 3586 [2022-11-23 14:01:07,170 INFO L226 Difference]: Without dead ends: 1978 [2022-11-23 14:01:07,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:01:07,175 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 857 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:07,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 580 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:01:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-11-23 14:01:07,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1637. [2022-11-23 14:01:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1263 states have (on average 1.3697545526524149) internal successors, (1730), 1279 states have internal predecessors, (1730), 230 states have call successors, (230), 124 states have call predecessors, (230), 142 states have return successors, (325), 235 states have call predecessors, (325), 229 states have call successors, (325) [2022-11-23 14:01:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2285 transitions. [2022-11-23 14:01:07,488 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2285 transitions. Word has length 125 [2022-11-23 14:01:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:07,489 INFO L495 AbstractCegarLoop]: Abstraction has 1637 states and 2285 transitions. [2022-11-23 14:01:07,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:01:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2285 transitions. [2022-11-23 14:01:07,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:01:07,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:07,495 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:01:07,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:07,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:07,703 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:01:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 117951373, now seen corresponding path program 1 times [2022-11-23 14:01:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:01:07,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372657743] [2022-11-23 14:01:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:07,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:01:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:01:07,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:01:07,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372657743] [2022-11-23 14:01:07,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372657743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:07,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75080477] [2022-11-23 14:01:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:07,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:07,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:07,867 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:07,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:01:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:08,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:01:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:01:08,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:01:08,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75080477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:01:08,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:01:08,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:01:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643761306] [2022-11-23 14:01:08,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:01:08,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:01:08,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:01:08,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:01:08,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:08,212 INFO L87 Difference]: Start difference. First operand 1637 states and 2285 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2022-11-23 14:01:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:08,782 INFO L93 Difference]: Finished difference Result 3465 states and 5366 transitions. [2022-11-23 14:01:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:01:08,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 143 [2022-11-23 14:01:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:08,796 INFO L225 Difference]: With dead ends: 3465 [2022-11-23 14:01:08,796 INFO L226 Difference]: Without dead ends: 2543 [2022-11-23 14:01:08,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:08,803 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 363 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:08,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:01:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-11-23 14:01:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2536. [2022-11-23 14:01:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2025 states have (on average 1.428641975308642) internal successors, (2893), 2044 states have internal predecessors, (2893), 337 states have call successors, (337), 154 states have call predecessors, (337), 172 states have return successors, (494), 339 states have call predecessors, (494), 336 states have call successors, (494) [2022-11-23 14:01:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 3724 transitions. [2022-11-23 14:01:09,227 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 3724 transitions. Word has length 143 [2022-11-23 14:01:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:09,227 INFO L495 AbstractCegarLoop]: Abstraction has 2536 states and 3724 transitions. [2022-11-23 14:01:09,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2022-11-23 14:01:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 3724 transitions. [2022-11-23 14:01:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:01:09,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:09,232 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:01:09,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:09,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:09,439 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:01:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1855038223, now seen corresponding path program 1 times [2022-11-23 14:01:09,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:01:09,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629740240] [2022-11-23 14:01:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:01:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:01:09,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:01:09,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629740240] [2022-11-23 14:01:09,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629740240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:09,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046335856] [2022-11-23 14:01:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:09,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:09,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:09,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:09,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:01:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:09,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:01:09,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:01:09,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:01:09,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046335856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:01:09,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:01:09,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:01:09,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873241642] [2022-11-23 14:01:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:01:09,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:01:09,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:01:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:01:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:09,999 INFO L87 Difference]: Start difference. First operand 2536 states and 3724 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2022-11-23 14:01:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:10,795 INFO L93 Difference]: Finished difference Result 6147 states and 9784 transitions. [2022-11-23 14:01:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:01:10,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 143 [2022-11-23 14:01:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:10,819 INFO L225 Difference]: With dead ends: 6147 [2022-11-23 14:01:10,819 INFO L226 Difference]: Without dead ends: 4326 [2022-11-23 14:01:10,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:10,829 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 333 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:10,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:01:10,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-11-23 14:01:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4314. [2022-11-23 14:01:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4314 states, 3534 states have (on average 1.4683078664402942) internal successors, (5189), 3559 states have internal predecessors, (5189), 546 states have call successors, (546), 214 states have call predecessors, (546), 232 states have return successors, (823), 542 states have call predecessors, (823), 545 states have call successors, (823) [2022-11-23 14:01:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4314 states to 4314 states and 6558 transitions. [2022-11-23 14:01:11,548 INFO L78 Accepts]: Start accepts. Automaton has 4314 states and 6558 transitions. Word has length 143 [2022-11-23 14:01:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:11,549 INFO L495 AbstractCegarLoop]: Abstraction has 4314 states and 6558 transitions. [2022-11-23 14:01:11,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2022-11-23 14:01:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4314 states and 6558 transitions. [2022-11-23 14:01:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:01:11,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:11,557 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:01:11,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:11,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:11,765 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:01:11,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:11,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1395665425, now seen corresponding path program 1 times [2022-11-23 14:01:11,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:01:11,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353368627] [2022-11-23 14:01:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:11,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:01:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:01:11,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:01:11,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353368627] [2022-11-23 14:01:11,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353368627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:11,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430837436] [2022-11-23 14:01:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:11,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:11,920 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:11,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:01:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:12,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:01:12,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:01:12,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:01:12,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430837436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:01:12,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:01:12,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:01:12,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861722051] [2022-11-23 14:01:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:01:12,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:01:12,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:01:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:01:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:12,268 INFO L87 Difference]: Start difference. First operand 4314 states and 6558 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-11-23 14:01:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:13,505 INFO L93 Difference]: Finished difference Result 11451 states and 18479 transitions. [2022-11-23 14:01:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:01:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 143 [2022-11-23 14:01:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:13,550 INFO L225 Difference]: With dead ends: 11451 [2022-11-23 14:01:13,551 INFO L226 Difference]: Without dead ends: 7852 [2022-11-23 14:01:13,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:13,569 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 360 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:13,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:01:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2022-11-23 14:01:14,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 7830. [2022-11-23 14:01:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7830 states, 6522 states have (on average 1.49049371358479) internal successors, (9721), 6559 states have internal predecessors, (9721), 954 states have call successors, (954), 334 states have call predecessors, (954), 352 states have return successors, (1463), 938 states have call predecessors, (1463), 953 states have call successors, (1463) [2022-11-23 14:01:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7830 states to 7830 states and 12138 transitions. [2022-11-23 14:01:14,600 INFO L78 Accepts]: Start accepts. Automaton has 7830 states and 12138 transitions. Word has length 143 [2022-11-23 14:01:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:14,601 INFO L495 AbstractCegarLoop]: Abstraction has 7830 states and 12138 transitions. [2022-11-23 14:01:14,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-11-23 14:01:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 7830 states and 12138 transitions. [2022-11-23 14:01:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:01:14,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:14,614 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:01:14,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:14,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 14:01:14,822 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:01:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1739107889, now seen corresponding path program 1 times [2022-11-23 14:01:14,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:01:14,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463331411] [2022-11-23 14:01:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:14,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:01:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:01:14,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:01:14,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463331411] [2022-11-23 14:01:14,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463331411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:14,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913442246] [2022-11-23 14:01:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:14,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:14,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:14,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:15,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:01:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:15,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:01:15,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:01:15,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:01:15,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913442246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:01:15,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:01:15,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:01:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100750515] [2022-11-23 14:01:15,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:01:15,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:01:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:01:15,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:01:15,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:15,341 INFO L87 Difference]: Start difference. First operand 7830 states and 12138 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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) [2022-11-23 14:01:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:17,453 INFO L93 Difference]: Finished difference Result 21939 states and 35587 transitions. [2022-11-23 14:01:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:01:17,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 143 [2022-11-23 14:01:17,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:17,521 INFO L225 Difference]: With dead ends: 21939 [2022-11-23 14:01:17,521 INFO L226 Difference]: Without dead ends: 14824 [2022-11-23 14:01:17,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:17,551 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 342 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:17,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:01:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14824 states. [2022-11-23 14:01:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14824 to 14782. [2022-11-23 14:01:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14782 states, 12438 states have (on average 1.5006431902235087) internal successors, (18665), 12499 states have internal predecessors, (18665), 1750 states have call successors, (1750), 574 states have call predecessors, (1750), 592 states have return successors, (2707), 1710 states have call predecessors, (2707), 1749 states have call successors, (2707) [2022-11-23 14:01:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14782 states to 14782 states and 23122 transitions. [2022-11-23 14:01:19,530 INFO L78 Accepts]: Start accepts. Automaton has 14782 states and 23122 transitions. Word has length 143 [2022-11-23 14:01:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:19,531 INFO L495 AbstractCegarLoop]: Abstraction has 14782 states and 23122 transitions. [2022-11-23 14:01:19,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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) [2022-11-23 14:01:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 14782 states and 23122 transitions. [2022-11-23 14:01:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:01:19,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:19,551 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:01:19,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:19,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 14:01:19,768 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:01:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:19,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1464627955, now seen corresponding path program 1 times [2022-11-23 14:01:19,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:01:19,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287895540] [2022-11-23 14:01:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:19,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:01:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:01:19,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:01:19,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287895540] [2022-11-23 14:01:19,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287895540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:19,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451771574] [2022-11-23 14:01:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:19,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:19,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:19,927 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:19,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:01:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:01:20,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:01:20,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:01:20,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451771574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:01:20,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:01:20,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:01:20,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694439284] [2022-11-23 14:01:20,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:01:20,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:01:20,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:01:20,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:01:20,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:20,280 INFO L87 Difference]: Start difference. First operand 14782 states and 23122 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2022-11-23 14:01:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:24,255 INFO L93 Difference]: Finished difference Result 42675 states and 69239 transitions. [2022-11-23 14:01:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:01:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 143 [2022-11-23 14:01:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:24,396 INFO L225 Difference]: With dead ends: 42675 [2022-11-23 14:01:24,396 INFO L226 Difference]: Without dead ends: 28608 [2022-11-23 14:01:24,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:24,453 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 348 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:24,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:01:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28608 states. [2022-11-23 14:01:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28608 to 28526. [2022-11-23 14:01:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28526 states, 24150 states have (on average 1.5036438923395445) internal successors, (36313), 24259 states have internal predecessors, (36313), 3302 states have call successors, (3302), 1054 states have call predecessors, (3302), 1072 states have return successors, (5123), 3214 states have call predecessors, (5123), 3301 states have call successors, (5123) [2022-11-23 14:01:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28526 states to 28526 states and 44738 transitions. [2022-11-23 14:01:28,727 INFO L78 Accepts]: Start accepts. Automaton has 28526 states and 44738 transitions. Word has length 143 [2022-11-23 14:01:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:28,727 INFO L495 AbstractCegarLoop]: Abstraction has 28526 states and 44738 transitions. [2022-11-23 14:01:28,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2022-11-23 14:01:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 28526 states and 44738 transitions. [2022-11-23 14:01:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:01:28,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:28,764 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:01:28,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:28,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:28,974 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:01:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:28,974 INFO L85 PathProgramCache]: Analyzing trace with hash -478551605, now seen corresponding path program 1 times [2022-11-23 14:01:28,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:01:28,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286286751] [2022-11-23 14:01:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:01:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:01:29,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:01:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286286751] [2022-11-23 14:01:29,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286286751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:29,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981954394] [2022-11-23 14:01:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:29,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:29,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:29,125 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:29,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a62d97-e43f-4b80-a187-3b0215b45dd7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:01:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:29,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:01:29,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:01:29,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:01:29,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981954394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:01:29,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:01:29,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:01:29,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584596601] [2022-11-23 14:01:29,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:01:29,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:01:29,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:01:29,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:01:29,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:29,478 INFO L87 Difference]: Start difference. First operand 28526 states and 44738 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2022-11-23 14:01:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:37,568 INFO L93 Difference]: Finished difference Result 83667 states and 135415 transitions. [2022-11-23 14:01:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:01:37,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 143 [2022-11-23 14:01:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:38,071 INFO L225 Difference]: With dead ends: 83667 [2022-11-23 14:01:38,072 INFO L226 Difference]: Without dead ends: 55856 [2022-11-23 14:01:38,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:01:38,194 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 354 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:38,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:01:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55856 states.