./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d9ed75528b8d19bd57b9807f295b98ef03135122ab1c9d2a59ccb3a2a66766e0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:33:27,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:33:27,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:33:27,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:33:27,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:33:27,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:33:27,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:33:27,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:33:27,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:33:27,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:33:27,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:33:27,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:33:27,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:33:27,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:33:27,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:33:27,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:33:27,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:33:27,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:33:27,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:33:27,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:33:27,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:33:27,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:33:27,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:33:27,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:33:27,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:33:27,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:33:27,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:33:27,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:33:27,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:33:27,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:33:27,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:33:27,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:33:27,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:33:27,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:33:27,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:33:27,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:33:27,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:33:27,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:33:27,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:33:27,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:33:27,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:33:27,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:33:27,211 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:33:27,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:33:27,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:33:27,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:33:27,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:33:27,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:33:27,214 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:33:27,214 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:33:27,214 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:33:27,215 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:33:27,216 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:33:27,216 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:33:27,216 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:33:27,216 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:33:27,217 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:33:27,217 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:33:27,217 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:33:27,217 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:33:27,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:33:27,218 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:33:27,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:33:27,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:33:27,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:33:27,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:33:27,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:33:27,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:33:27,219 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:33:27,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:33:27,220 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:33:27,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:33:27,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:33:27,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:33:27,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:33:27,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:33:27,221 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:33:27,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:33:27,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:33:27,221 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:33:27,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:33:27,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:33:27,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:33:27,222 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_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9ed75528b8d19bd57b9807f295b98ef03135122ab1c9d2a59ccb3a2a66766e0 [2022-11-03 02:33:27,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:33:27,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:33:27,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:33:27,535 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:33:27,536 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:33:27,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c [2022-11-03 02:33:27,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/data/6a91cc390/e4658714bf4a412f81af6007892fa403/FLAGb3ef8ab38 [2022-11-03 02:33:28,556 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:33:28,557 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c [2022-11-03 02:33:28,604 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/data/6a91cc390/e4658714bf4a412f81af6007892fa403/FLAGb3ef8ab38 [2022-11-03 02:33:28,921 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/data/6a91cc390/e4658714bf4a412f81af6007892fa403 [2022-11-03 02:33:28,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:33:28,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:33:28,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:33:28,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:33:28,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:33:28,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:33:28" (1/1) ... [2022-11-03 02:33:28,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5ce93e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:28, skipping insertion in model container [2022-11-03 02:33:28,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:33:28" (1/1) ... [2022-11-03 02:33:28,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:33:29,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:33:31,636 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c[380323,380336] [2022-11-03 02:33:31,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c[383339,383352] [2022-11-03 02:33:31,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:33:32,001 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:33:33,266 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c[380323,380336] [2022-11-03 02:33:33,273 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c[383339,383352] [2022-11-03 02:33:33,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:33:33,421 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:33:33,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33 WrapperNode [2022-11-03 02:33:33,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:33:33,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:33:33,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:33:33,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:33:33,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:33,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:33,933 INFO L138 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13083 [2022-11-03 02:33:33,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:33:33,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:33:33,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:33:33,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:33:33,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:33,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:34,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:34,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:34,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:34,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:34,358 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:34,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:34,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:33:34,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:33:34,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:33:34,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:33:34,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (1/1) ... [2022-11-03 02:33:34,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:33:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:34,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:33:34,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:33:34,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:33:34,540 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:33:34,540 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:33:34,540 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:33:34,540 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:33:34,541 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:33:34,541 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:33:34,541 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:33:34,541 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:33:34,541 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:33:34,542 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:33:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:33:34,542 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:33:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:33:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:33:34,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:33:34,699 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:33:34,701 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:33:43,870 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:33:46,487 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:33:46,488 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-03 02:33:46,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:33:46 BoogieIcfgContainer [2022-11-03 02:33:46,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:33:46,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:33:46,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:33:46,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:33:46,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:33:28" (1/3) ... [2022-11-03 02:33:46,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3211b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:33:46, skipping insertion in model container [2022-11-03 02:33:46,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:33" (2/3) ... [2022-11-03 02:33:46,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3211b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:33:46, skipping insertion in model container [2022-11-03 02:33:46,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:33:46" (3/3) ... [2022-11-03 02:33:46,504 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.10.cil-2.c [2022-11-03 02:33:46,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:33:46,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:33:46,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:33:46,695 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;@304e3822, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:33:46,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:33:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-03 02:33:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:33:46,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:46,719 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] [2022-11-03 02:33:46,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:46,727 INFO L85 PathProgramCache]: Analyzing trace with hash -916646565, now seen corresponding path program 1 times [2022-11-03 02:33:46,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:46,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716210429] [2022-11-03 02:33:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:46,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:47,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:47,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716210429] [2022-11-03 02:33:47,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716210429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:47,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:47,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:47,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062135238] [2022-11-03 02:33:47,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:47,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:47,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:47,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:47,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:47,290 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:33:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:48,347 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2022-11-03 02:33:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:33:48,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 61 [2022-11-03 02:33:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:48,375 INFO L225 Difference]: With dead ends: 3767 [2022-11-03 02:33:48,375 INFO L226 Difference]: Without dead ends: 1957 [2022-11-03 02:33:48,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:48,390 INFO L413 NwaCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:48,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:33:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-11-03 02:33:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2022-11-03 02:33:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-03 02:33:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2022-11-03 02:33:48,559 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2022-11-03 02:33:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:48,560 INFO L495 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2022-11-03 02:33:48,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:33:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2022-11-03 02:33:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:33:48,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:48,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:48,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:33:48,575 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1210894831, now seen corresponding path program 1 times [2022-11-03 02:33:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:48,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048477854] [2022-11-03 02:33:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:48,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:33:48,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:48,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048477854] [2022-11-03 02:33:48,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048477854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:48,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783630928] [2022-11-03 02:33:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:48,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:48,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:48,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:48,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:33:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:33:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:33:49,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:49,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783630928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:49,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:33:49,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:33:49,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354622840] [2022-11-03 02:33:49,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:49,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:49,229 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:33:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:49,762 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2022-11-03 02:33:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:49,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 122 [2022-11-03 02:33:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:49,774 INFO L225 Difference]: With dead ends: 2569 [2022-11-03 02:33:49,775 INFO L226 Difference]: Without dead ends: 2259 [2022-11-03 02:33:49,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:49,778 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:49,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:33:49,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-11-03 02:33:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2022-11-03 02:33:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-03 02:33:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2022-11-03 02:33:49,857 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2022-11-03 02:33:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:49,858 INFO L495 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2022-11-03 02:33:49,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:33:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2022-11-03 02:33:49,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:33:49,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:49,862 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:49,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:33:50,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:50,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:50,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1052608625, now seen corresponding path program 1 times [2022-11-03 02:33:50,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:50,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105429224] [2022-11-03 02:33:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:50,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:33:50,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105429224] [2022-11-03 02:33:50,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105429224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140128968] [2022-11-03 02:33:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:50,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:50,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:50,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:50,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:33:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:33:50,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:33:50,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:50,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140128968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:50,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:33:50,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:33:50,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624174508] [2022-11-03 02:33:50,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:50,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:50,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:50,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:50,675 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:33:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:51,221 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2022-11-03 02:33:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 122 [2022-11-03 02:33:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:51,240 INFO L225 Difference]: With dead ends: 3460 [2022-11-03 02:33:51,240 INFO L226 Difference]: Without dead ends: 2851 [2022-11-03 02:33:51,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:51,248 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:51,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:33:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2022-11-03 02:33:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2022-11-03 02:33:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-03 02:33:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2022-11-03 02:33:51,367 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2022-11-03 02:33:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:51,368 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2022-11-03 02:33:51,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:33:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2022-11-03 02:33:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:33:51,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:51,375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:51,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:51,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:51,594 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 534727377, now seen corresponding path program 1 times [2022-11-03 02:33:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:51,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144876221] [2022-11-03 02:33:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:33:51,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144876221] [2022-11-03 02:33:51,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144876221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:51,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857719262] [2022-11-03 02:33:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:51,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:51,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:51,750 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:51,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:33:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:33:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:33:52,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:52,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857719262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:52,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:33:52,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:33:52,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845071798] [2022-11-03 02:33:52,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:52,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:52,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:52,025 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:33:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:52,603 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2022-11-03 02:33:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:52,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 122 [2022-11-03 02:33:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:52,624 INFO L225 Difference]: With dead ends: 5218 [2022-11-03 02:33:52,625 INFO L226 Difference]: Without dead ends: 4019 [2022-11-03 02:33:52,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:52,632 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:52,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:33:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2022-11-03 02:33:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2022-11-03 02:33:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-03 02:33:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2022-11-03 02:33:52,831 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2022-11-03 02:33:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:52,831 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2022-11-03 02:33:52,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:33:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2022-11-03 02:33:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:33:52,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:52,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:52,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:53,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:53,051 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash 863880497, now seen corresponding path program 1 times [2022-11-03 02:33:53,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:53,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930541008] [2022-11-03 02:33:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:53,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:33:53,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:53,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930541008] [2022-11-03 02:33:53,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930541008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:53,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350622709] [2022-11-03 02:33:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:53,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:53,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:53,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:53,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:33:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:33:53,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:33:53,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:53,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350622709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:53,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:33:53,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:33:53,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604260058] [2022-11-03 02:33:53,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:53,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:53,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:53,485 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:33:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:54,075 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2022-11-03 02:33:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 122 [2022-11-03 02:33:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:54,104 INFO L225 Difference]: With dead ends: 8686 [2022-11-03 02:33:54,104 INFO L226 Difference]: Without dead ends: 6323 [2022-11-03 02:33:54,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:54,116 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:54,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:33:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2022-11-03 02:33:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2022-11-03 02:33:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-11-03 02:33:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2022-11-03 02:33:54,520 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2022-11-03 02:33:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:54,521 INFO L495 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2022-11-03 02:33:54,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:33:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2022-11-03 02:33:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:33:54,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:54,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:54,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:33:54,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:54,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1254141649, now seen corresponding path program 1 times [2022-11-03 02:33:54,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:54,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465021484] [2022-11-03 02:33:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:54,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:33:55,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:55,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465021484] [2022-11-03 02:33:55,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465021484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:55,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203535849] [2022-11-03 02:33:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:55,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:55,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:55,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:55,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:33:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:33:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:33:55,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:55,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203535849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:55,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:33:55,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:33:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343487429] [2022-11-03 02:33:55,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:55,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:33:55,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:55,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:33:55,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:55,366 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 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) [2022-11-03 02:33:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:56,308 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2022-11-03 02:33:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:33:56,309 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 122 [2022-11-03 02:33:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:56,394 INFO L225 Difference]: With dead ends: 15526 [2022-11-03 02:33:56,394 INFO L226 Difference]: Without dead ends: 10867 [2022-11-03 02:33:56,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:56,421 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:56,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:33:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2022-11-03 02:33:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2022-11-03 02:33:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-11-03 02:33:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2022-11-03 02:33:57,086 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2022-11-03 02:33:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:57,090 INFO L495 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2022-11-03 02:33:57,090 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) [2022-11-03 02:33:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2022-11-03 02:33:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:33:57,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:57,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:57,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:57,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e240edfa-a8a1-446c-bc46-362b5212805a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:33:57,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:57,335 INFO L85 PathProgramCache]: Analyzing trace with hash 259766577, now seen corresponding path program 1 times [2022-11-03 02:33:57,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:57,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763346176] [2022-11-03 02:33:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:57,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:33:58,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:58,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763346176] [2022-11-03 02:33:58,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763346176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:58,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:58,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:33:58,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836843185] [2022-11-03 02:33:58,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:58,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:33:58,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:33:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:58,127 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:34:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:00,326 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2022-11-03 02:34:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:34:00,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-11-03 02:34:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:00,397 INFO L225 Difference]: With dead ends: 26597 [2022-11-03 02:34:00,397 INFO L226 Difference]: Without dead ends: 17411 [2022-11-03 02:34:00,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:34:00,423 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 4030 mSDsluCounter, 10553 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 13095 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:00,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 13095 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:34:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2022-11-03 02:34:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2022-11-03 02:34:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-11-03 02:34:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2022-11-03 02:34:01,352 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2022-11-03 02:34:01,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:01,353 INFO L495 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2022-11-03 02:34:01,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:34:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2022-11-03 02:34:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:34:01,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:01,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:01,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:34:01,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:01,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1088943198, now seen corresponding path program 1 times [2022-11-03 02:34:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:01,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926873445] [2022-11-03 02:34:01,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:01,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:34:02,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:02,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926873445] [2022-11-03 02:34:02,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926873445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:02,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:02,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:34:02,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787387926] [2022-11-03 02:34:02,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:02,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:34:02,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:02,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:34:02,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:34:02,042 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:34:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:04,474 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2022-11-03 02:34:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:34:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-03 02:34:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:04,596 INFO L225 Difference]: With dead ends: 36973 [2022-11-03 02:34:04,596 INFO L226 Difference]: Without dead ends: 23323 [2022-11-03 02:34:04,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:34:04,646 INFO L413 NwaCegarLoop]: 3273 mSDtfsCounter, 3976 mSDsluCounter, 10418 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3982 SdHoareTripleChecker+Valid, 12953 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:04,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3982 Valid, 12953 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:34:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2022-11-03 02:34:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2022-11-03 02:34:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2022-11-03 02:34:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2022-11-03 02:34:06,262 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2022-11-03 02:34:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:06,264 INFO L495 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2022-11-03 02:34:06,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:34:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2022-11-03 02:34:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:34:06,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:06,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:06,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:34:06,296 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:06,297 INFO L85 PathProgramCache]: Analyzing trace with hash 136455893, now seen corresponding path program 1 times [2022-11-03 02:34:06,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:06,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802094680] [2022-11-03 02:34:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:06,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:34:06,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:06,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802094680] [2022-11-03 02:34:06,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802094680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:06,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:06,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:34:06,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035078104] [2022-11-03 02:34:06,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:06,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:34:06,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:06,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:34:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:34:06,856 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:34:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:10,511 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2022-11-03 02:34:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:34:10,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-11-03 02:34:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:10,746 INFO L225 Difference]: With dead ends: 72237 [2022-11-03 02:34:10,746 INFO L226 Difference]: Without dead ends: 51955 [2022-11-03 02:34:10,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:34:10,803 INFO L413 NwaCegarLoop]: 3283 mSDtfsCounter, 4216 mSDsluCounter, 7008 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 9787 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:10,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4235 Valid, 9787 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:34:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2022-11-03 02:34:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2022-11-03 02:34:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-11-03 02:34:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2022-11-03 02:34:13,693 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2022-11-03 02:34:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:13,694 INFO L495 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2022-11-03 02:34:13,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:34:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2022-11-03 02:34:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:34:13,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:13,785 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:13,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:34:13,785 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:13,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:13,786 INFO L85 PathProgramCache]: Analyzing trace with hash -355811258, now seen corresponding path program 1 times [2022-11-03 02:34:13,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:13,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89052710] [2022-11-03 02:34:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:13,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:34:14,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:14,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89052710] [2022-11-03 02:34:14,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89052710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:14,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:14,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:34:14,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893125349] [2022-11-03 02:34:14,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:14,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:34:14,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:14,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:34:14,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:34:14,441 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:34:20,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:20,000 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2022-11-03 02:34:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:34:20,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-11-03 02:34:20,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:20,265 INFO L225 Difference]: With dead ends: 108861 [2022-11-03 02:34:20,265 INFO L226 Difference]: Without dead ends: 69163 [2022-11-03 02:34:20,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:34:20,365 INFO L413 NwaCegarLoop]: 3273 mSDtfsCounter, 4039 mSDsluCounter, 10490 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4045 SdHoareTripleChecker+Valid, 13013 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:20,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4045 Valid, 13013 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:34:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2022-11-03 02:34:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2022-11-03 02:34:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2022-11-03 02:34:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2022-11-03 02:34:24,914 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2022-11-03 02:34:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:24,914 INFO L495 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2022-11-03 02:34:24,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:34:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2022-11-03 02:34:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:34:24,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:24,981 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:24,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:34:24,982 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1928275731, now seen corresponding path program 1 times [2022-11-03 02:34:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:24,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807644968] [2022-11-03 02:34:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:24,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:34:25,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:25,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807644968] [2022-11-03 02:34:25,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807644968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:25,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:25,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:34:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084404638] [2022-11-03 02:34:25,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:25,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:34:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:34:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:34:25,493 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)