./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/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_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/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_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/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 a46e7920fd800fb5978581c250ecd4216776e6eac1b8dfb89d2f8a9c2732a33c --- 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 03:27:27,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:27:27,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:27:27,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:27:27,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:27:27,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:27:27,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:27:27,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:27:27,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:27:27,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:27:27,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:27:27,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:27:27,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:27:27,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:27:27,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:27:27,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:27:27,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:27:27,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:27:27,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:27:27,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:27:27,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:27:27,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:27:27,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:27:27,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:27:27,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:27:27,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:27:27,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:27:27,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:27:27,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:27:27,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:27:27,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:27:27,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:27:27,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:27:27,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:27:27,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:27:27,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:27:27,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:27:27,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:27:27,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:27:27,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:27:27,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:27:27,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:27:27,146 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:27:27,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:27:27,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:27:27,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:27:27,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:27:27,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:27:27,148 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:27:27,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:27:27,148 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:27:27,148 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:27:27,148 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:27:27,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:27:27,149 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:27:27,149 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:27:27,149 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:27:27,149 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:27:27,149 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:27:27,149 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:27:27,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:27:27,150 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:27:27,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:27:27,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:27:27,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:27:27,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:27:27,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:27:27,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:27:27,151 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:27:27,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:27:27,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:27:27,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:27:27,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:27:27,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:27:27,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:27,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:27:27,153 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:27:27,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:27:27,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:27:27,153 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:27:27,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:27:27,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:27:27,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:27:27,154 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_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a46e7920fd800fb5978581c250ecd4216776e6eac1b8dfb89d2f8a9c2732a33c [2022-11-03 03:27:27,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:27:27,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:27:27,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:27:27,443 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:27:27,444 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:27:27,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c [2022-11-03 03:27:27,522 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/data/8129283e5/9a2f2c91e1894f6fb52410eab4fa1f2a/FLAG301b74335 [2022-11-03 03:27:28,028 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:27:28,029 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c [2022-11-03 03:27:28,045 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/data/8129283e5/9a2f2c91e1894f6fb52410eab4fa1f2a/FLAG301b74335 [2022-11-03 03:27:28,365 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/data/8129283e5/9a2f2c91e1894f6fb52410eab4fa1f2a [2022-11-03 03:27:28,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:27:28,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:27:28,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:28,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:27:28,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:27:28,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:28" (1/1) ... [2022-11-03 03:27:28,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61bddac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:28, skipping insertion in model container [2022-11-03 03:27:28,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:28" (1/1) ... [2022-11-03 03:27:28,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:27:28,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:27:28,644 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_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[914,927] [2022-11-03 03:27:28,701 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_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[7115,7128] [2022-11-03 03:27:28,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:28,870 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:27:28,899 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_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[914,927] [2022-11-03 03:27:28,946 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_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[7115,7128] [2022-11-03 03:27:29,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:29,043 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:27:29,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29 WrapperNode [2022-11-03 03:27:29,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:29,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:29,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:27:29,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:27:29,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,122 INFO L138 Inliner]: procedures = 77, calls = 93, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1040 [2022-11-03 03:27:29,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:29,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:27:29,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:27:29,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:27:29,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,177 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:27:29,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:27:29,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:27:29,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:27:29,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:29,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:29,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:27:29,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:27:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:27:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 03:27:29,281 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 03:27:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 03:27:29,281 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 03:27:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 03:27:29,282 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 03:27:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 03:27:29,282 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 03:27:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 03:27:29,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 03:27:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 03:27:29,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 03:27:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 03:27:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 03:27:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 03:27:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 03:27:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 03:27:29,285 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 03:27:29,285 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 03:27:29,285 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 03:27:29,285 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 03:27:29,285 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 03:27:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:27:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 03:27:29,286 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 03:27:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 03:27:29,286 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 03:27:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:27:29,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:27:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 03:27:29,287 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 03:27:29,478 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:27:29,481 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:27:30,483 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:27:31,101 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:27:31,101 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-03 03:27:31,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:31 BoogieIcfgContainer [2022-11-03 03:27:31,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:27:31,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:27:31,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:27:31,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:27:31,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:27:28" (1/3) ... [2022-11-03 03:27:31,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e482fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:31, skipping insertion in model container [2022-11-03 03:27:31,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29" (2/3) ... [2022-11-03 03:27:31,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e482fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:31, skipping insertion in model container [2022-11-03 03:27:31,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:31" (3/3) ... [2022-11-03 03:27:31,115 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.12.cil-2.c [2022-11-03 03:27:31,137 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:27:31,138 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 03:27:31,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:27:31,209 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;@31a11c95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:27:31,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 03:27:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 260 states, 203 states have (on average 1.541871921182266) internal successors, (313), 209 states have internal predecessors, (313), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 03:27:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:27:31,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:31,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:31,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:31,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2021198345, now seen corresponding path program 1 times [2022-11-03 03:27:31,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:31,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967190989] [2022-11-03 03:27:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:31,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:31,603 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 03:27:31,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:31,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967190989] [2022-11-03 03:27:31,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967190989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:31,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:31,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:27:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269107050] [2022-11-03 03:27:31,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:31,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:31,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:27:31,661 INFO L87 Difference]: Start difference. First operand has 260 states, 203 states have (on average 1.541871921182266) internal successors, (313), 209 states have internal predecessors, (313), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:27:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:32,206 INFO L93 Difference]: Finished difference Result 571 states and 857 transitions. [2022-11-03 03:27:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:27:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 03:27:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:32,234 INFO L225 Difference]: With dead ends: 571 [2022-11-03 03:27:32,234 INFO L226 Difference]: Without dead ends: 315 [2022-11-03 03:27:32,244 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 03:27:32,248 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 441 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:32,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 648 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:27:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-03 03:27:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 308. [2022-11-03 03:27:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 238 states have (on average 1.453781512605042) internal successors, (346), 242 states have internal predecessors, (346), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 03:27:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 440 transitions. [2022-11-03 03:27:32,391 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 440 transitions. Word has length 45 [2022-11-03 03:27:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:32,391 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 440 transitions. [2022-11-03 03:27:32,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:27:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 440 transitions. [2022-11-03 03:27:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:27:32,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:32,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:32,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:27:32,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:32,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:32,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1354794328, now seen corresponding path program 1 times [2022-11-03 03:27:32,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:32,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710079197] [2022-11-03 03:27:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:32,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:32,674 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 03:27:32,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:32,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710079197] [2022-11-03 03:27:32,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710079197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:32,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:32,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:27:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350979506] [2022-11-03 03:27:32,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:32,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:27:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:32,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:27:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:27:32,678 INFO L87 Difference]: Start difference. First operand 308 states and 440 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:27:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:33,551 INFO L93 Difference]: Finished difference Result 710 states and 943 transitions. [2022-11-03 03:27:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:33,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 03:27:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:33,560 INFO L225 Difference]: With dead ends: 710 [2022-11-03 03:27:33,560 INFO L226 Difference]: Without dead ends: 578 [2022-11-03 03:27:33,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:27:33,564 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 908 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:33,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 1148 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:27:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-03 03:27:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 494. [2022-11-03 03:27:33,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 370 states have (on average 1.3675675675675676) internal successors, (506), 375 states have internal predecessors, (506), 75 states have call successors, (75), 44 states have call predecessors, (75), 47 states have return successors, (77), 76 states have call predecessors, (77), 73 states have call successors, (77) [2022-11-03 03:27:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 658 transitions. [2022-11-03 03:27:33,635 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 658 transitions. Word has length 45 [2022-11-03 03:27:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:33,635 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 658 transitions. [2022-11-03 03:27:33,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:27:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 658 transitions. [2022-11-03 03:27:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:27:33,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:33,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:33,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:27:33,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash 647056804, now seen corresponding path program 1 times [2022-11-03 03:27:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:33,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499279823] [2022-11-03 03:27:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:33,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:33,940 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 03:27:33,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:33,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499279823] [2022-11-03 03:27:33,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499279823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:33,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:33,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:27:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371322308] [2022-11-03 03:27:33,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:27:33,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:27:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:33,943 INFO L87 Difference]: Start difference. First operand 494 states and 658 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 03:27:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:34,917 INFO L93 Difference]: Finished difference Result 1010 states and 1274 transitions. [2022-11-03 03:27:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:27:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-03 03:27:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:34,922 INFO L225 Difference]: With dead ends: 1010 [2022-11-03 03:27:34,923 INFO L226 Difference]: Without dead ends: 708 [2022-11-03 03:27:34,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:27:34,925 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 531 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:34,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1045 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:27:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-11-03 03:27:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 673. [2022-11-03 03:27:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 495 states have (on average 1.3292929292929292) internal successors, (658), 501 states have internal predecessors, (658), 102 states have call successors, (102), 67 states have call predecessors, (102), 74 states have return successors, (108), 106 states have call predecessors, (108), 100 states have call successors, (108) [2022-11-03 03:27:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 868 transitions. [2022-11-03 03:27:35,018 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 868 transitions. Word has length 46 [2022-11-03 03:27:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:35,019 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 868 transitions. [2022-11-03 03:27:35,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 03:27:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 868 transitions. [2022-11-03 03:27:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:27:35,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:35,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:35,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:27:35,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash -733543464, now seen corresponding path program 1 times [2022-11-03 03:27:35,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:35,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609871921] [2022-11-03 03:27:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:35,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:35,127 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 03:27:35,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:35,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609871921] [2022-11-03 03:27:35,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609871921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:35,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:35,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:27:35,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188168476] [2022-11-03 03:27:35,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:27:35,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:35,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:27:35,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:27:35,132 INFO L87 Difference]: Start difference. First operand 673 states and 868 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:27:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:35,368 INFO L93 Difference]: Finished difference Result 1237 states and 1538 transitions. [2022-11-03 03:27:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:27:35,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-03 03:27:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:35,375 INFO L225 Difference]: With dead ends: 1237 [2022-11-03 03:27:35,375 INFO L226 Difference]: Without dead ends: 805 [2022-11-03 03:27:35,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:27:35,386 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 67 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:35,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 620 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-11-03 03:27:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 700. [2022-11-03 03:27:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 518 states have (on average 1.3185328185328185) internal successors, (683), 524 states have internal predecessors, (683), 104 states have call successors, (104), 69 states have call predecessors, (104), 76 states have return successors, (110), 108 states have call predecessors, (110), 102 states have call successors, (110) [2022-11-03 03:27:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 897 transitions. [2022-11-03 03:27:35,470 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 897 transitions. Word has length 47 [2022-11-03 03:27:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:35,472 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 897 transitions. [2022-11-03 03:27:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:27:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 897 transitions. [2022-11-03 03:27:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 03:27:35,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:35,474 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:35,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:27:35,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:35,480 INFO L85 PathProgramCache]: Analyzing trace with hash -360963317, now seen corresponding path program 1 times [2022-11-03 03:27:35,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:35,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474447912] [2022-11-03 03:27:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:35,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:27:35,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474447912] [2022-11-03 03:27:35,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474447912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:35,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:35,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:27:35,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486028358] [2022-11-03 03:27:35,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:35,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:27:35,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:27:35,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:27:35,596 INFO L87 Difference]: Start difference. First operand 700 states and 897 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:27:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:35,776 INFO L93 Difference]: Finished difference Result 890 states and 1118 transitions. [2022-11-03 03:27:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:27:35,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-03 03:27:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:35,781 INFO L225 Difference]: With dead ends: 890 [2022-11-03 03:27:35,781 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 03:27:35,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:27:35,783 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 346 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:35,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 388 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:35,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 03:27:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 508. [2022-11-03 03:27:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 378 states have (on average 1.3253968253968254) internal successors, (501), 382 states have internal predecessors, (501), 80 states have call successors, (80), 49 states have call predecessors, (80), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 03:27:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 659 transitions. [2022-11-03 03:27:35,832 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 659 transitions. Word has length 53 [2022-11-03 03:27:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:35,833 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 659 transitions. [2022-11-03 03:27:35,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:27:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 659 transitions. [2022-11-03 03:27:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:27:35,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:35,834 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:35,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:27:35,835 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash 752262594, now seen corresponding path program 1 times [2022-11-03 03:27:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:35,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657337063] [2022-11-03 03:27:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:35,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:35,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:35,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657337063] [2022-11-03 03:27:35,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657337063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:35,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:35,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:27:35,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686964265] [2022-11-03 03:27:35,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:35,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:35,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:27:35,921 INFO L87 Difference]: Start difference. First operand 508 states and 659 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 03:27:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:36,327 INFO L93 Difference]: Finished difference Result 611 states and 775 transitions. [2022-11-03 03:27:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:27:36,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-03 03:27:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:36,331 INFO L225 Difference]: With dead ends: 611 [2022-11-03 03:27:36,331 INFO L226 Difference]: Without dead ends: 608 [2022-11-03 03:27:36,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:36,333 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 629 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:36,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 364 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:27:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-03 03:27:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2022-11-03 03:27:36,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 378 states have (on average 1.3174603174603174) internal successors, (498), 381 states have internal predecessors, (498), 79 states have call successors, (79), 49 states have call predecessors, (79), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 03:27:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 655 transitions. [2022-11-03 03:27:36,389 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 655 transitions. Word has length 54 [2022-11-03 03:27:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:36,390 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 655 transitions. [2022-11-03 03:27:36,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 03:27:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 655 transitions. [2022-11-03 03:27:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 03:27:36,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:36,391 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:36,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:27:36,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:36,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1843870145, now seen corresponding path program 1 times [2022-11-03 03:27:36,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:36,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493408594] [2022-11-03 03:27:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:36,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:36,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493408594] [2022-11-03 03:27:36,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493408594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:27:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876589746] [2022-11-03 03:27:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:36,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:36,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:36,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:27:36,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:27:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:27:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:37,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:27:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:37,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876589746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:27:37,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300547944] [2022-11-03 03:27:37,448 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 03:27:37,448 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:27:37,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:27:37,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:27:37,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:27:45,817 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-11-03 03:27:45,848 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 201 for LOIs [2022-11-03 03:27:45,875 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-11-03 03:27:46,673 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-11-03 03:27:46,790 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-11-03 03:27:46,885 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-11-03 03:27:46,933 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-11-03 03:27:46,960 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:21,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1300547944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:21,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:28:21,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-03 03:28:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118691083] [2022-11-03 03:28:21,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:21,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 03:28:21,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 03:28:21,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 03:28:21,278 INFO L87 Difference]: Start difference. First operand 507 states and 655 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 03:29:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:12,417 INFO L93 Difference]: Finished difference Result 871 states and 1066 transitions. [2022-11-03 03:29:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 03:29:12,421 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-03 03:29:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:12,424 INFO L225 Difference]: With dead ends: 871 [2022-11-03 03:29:12,425 INFO L226 Difference]: Without dead ends: 556 [2022-11-03 03:29:12,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 68.2s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 03:29:12,429 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 169 mSDsluCounter, 2680 mSDsCounter, 0 mSdLazyCounter, 6545 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 6730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 6545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:12,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 2892 Invalid, 6730 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [185 Valid, 6545 Invalid, 0 Unknown, 0 Unchecked, 16.8s Time] [2022-11-03 03:29:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-03 03:29:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 541. [2022-11-03 03:29:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 404 states have (on average 1.301980198019802) internal successors, (526), 407 states have internal predecessors, (526), 81 states have call successors, (81), 55 states have call predecessors, (81), 54 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-03 03:29:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 687 transitions. [2022-11-03 03:29:12,542 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 687 transitions. Word has length 55 [2022-11-03 03:29:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:12,542 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 687 transitions. [2022-11-03 03:29:12,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 03:29:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 687 transitions. [2022-11-03 03:29:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 03:29:12,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:12,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:12,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:12,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:12,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1735424114, now seen corresponding path program 1 times [2022-11-03 03:29:12,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:12,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651230479] [2022-11-03 03:29:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:12,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:29:12,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:12,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651230479] [2022-11-03 03:29:12,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651230479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:12,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:12,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:12,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279382185] [2022-11-03 03:29:12,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:12,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:12,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:12,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:12,828 INFO L87 Difference]: Start difference. First operand 541 states and 687 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:29:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:13,127 INFO L93 Difference]: Finished difference Result 822 states and 1009 transitions. [2022-11-03 03:29:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-03 03:29:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:13,133 INFO L225 Difference]: With dead ends: 822 [2022-11-03 03:29:13,133 INFO L226 Difference]: Without dead ends: 653 [2022-11-03 03:29:13,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:13,135 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 42 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:13,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 659 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:13,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-11-03 03:29:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 576. [2022-11-03 03:29:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 433 states have (on average 1.297921478060046) internal successors, (562), 436 states have internal predecessors, (562), 84 states have call successors, (84), 58 states have call predecessors, (84), 57 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-03 03:29:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 729 transitions. [2022-11-03 03:29:13,272 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 729 transitions. Word has length 61 [2022-11-03 03:29:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:13,273 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 729 transitions. [2022-11-03 03:29:13,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:29:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 729 transitions. [2022-11-03 03:29:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:29:13,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:13,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:13,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:29:13,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1446486761, now seen corresponding path program 1 times [2022-11-03 03:29:13,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:13,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763402632] [2022-11-03 03:29:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:29:13,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763402632] [2022-11-03 03:29:13,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763402632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:13,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:13,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:29:13,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828986945] [2022-11-03 03:29:13,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:13,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:29:13,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:13,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:29:13,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:13,484 INFO L87 Difference]: Start difference. First operand 576 states and 729 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:29:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:14,591 INFO L93 Difference]: Finished difference Result 1039 states and 1255 transitions. [2022-11-03 03:29:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:29:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-03 03:29:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:14,597 INFO L225 Difference]: With dead ends: 1039 [2022-11-03 03:29:14,597 INFO L226 Difference]: Without dead ends: 736 [2022-11-03 03:29:14,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:29:14,599 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 515 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:14,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1006 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:29:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-03 03:29:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 715. [2022-11-03 03:29:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 527 states have (on average 1.2618595825426946) internal successors, (665), 530 states have internal predecessors, (665), 108 states have call successors, (108), 79 states have call predecessors, (108), 78 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2022-11-03 03:29:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 880 transitions. [2022-11-03 03:29:14,727 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 880 transitions. Word has length 63 [2022-11-03 03:29:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:14,727 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 880 transitions. [2022-11-03 03:29:14,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:29:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 880 transitions. [2022-11-03 03:29:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 03:29:14,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:14,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:14,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:29:14,730 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:14,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1421406848, now seen corresponding path program 1 times [2022-11-03 03:29:14,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:14,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083063985] [2022-11-03 03:29:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:14,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:29:14,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:14,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083063985] [2022-11-03 03:29:14,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083063985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:14,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669806690] [2022-11-03 03:29:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:14,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:14,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:14,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:14,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:29:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:15,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:15,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:29:15,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:29:15,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669806690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:15,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535528779] [2022-11-03 03:29:15,578 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 03:29:15,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:15,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:15,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:15,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:37,974 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-11-03 03:29:38,012 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 171 for LOIs [2022-11-03 03:29:38,036 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 324 for LOIs [2022-11-03 03:29:38,228 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-11-03 03:29:39,214 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-11-03 03:29:39,308 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-11-03 03:29:39,401 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-11-03 03:29:39,435 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-11-03 03:29:39,472 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:36,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19761#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:36,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:36,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:30:36,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-03 03:30:36,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242022306] [2022-11-03 03:30:36,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:36,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:30:36,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:36,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:30:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 03:30:36,646 INFO L87 Difference]: Start difference. First operand 715 states and 880 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 03:30:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:37,713 INFO L93 Difference]: Finished difference Result 1809 states and 2121 transitions. [2022-11-03 03:30:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:30:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-03 03:30:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:37,724 INFO L225 Difference]: With dead ends: 1809 [2022-11-03 03:30:37,725 INFO L226 Difference]: Without dead ends: 1806 [2022-11-03 03:30:37,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 03:30:37,728 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 548 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:37,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1426 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:30:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-11-03 03:30:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1229. [2022-11-03 03:30:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 883 states have (on average 1.2276330690826727) internal successors, (1084), 886 states have internal predecessors, (1084), 192 states have call successors, (192), 153 states have call predecessors, (192), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-03 03:30:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1467 transitions. [2022-11-03 03:30:38,009 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1467 transitions. Word has length 64 [2022-11-03 03:30:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:38,011 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1467 transitions. [2022-11-03 03:30:38,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 03:30:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1467 transitions. [2022-11-03 03:30:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:30:38,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:38,020 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:38,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:38,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:30:38,236 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash 148070495, now seen corresponding path program 2 times [2022-11-03 03:30:38,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:38,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519793650] [2022-11-03 03:30:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:30:38,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:38,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519793650] [2022-11-03 03:30:38,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519793650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:38,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:38,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:38,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41253828] [2022-11-03 03:30:38,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:38,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:38,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:38,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:38,298 INFO L87 Difference]: Start difference. First operand 1229 states and 1467 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:30:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:38,715 INFO L93 Difference]: Finished difference Result 1981 states and 2323 transitions. [2022-11-03 03:30:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:38,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-03 03:30:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:38,723 INFO L225 Difference]: With dead ends: 1981 [2022-11-03 03:30:38,724 INFO L226 Difference]: Without dead ends: 1225 [2022-11-03 03:30:38,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:38,727 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 349 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:38,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 421 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-11-03 03:30:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1214. [2022-11-03 03:30:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 868 states have (on average 1.2142857142857142) internal successors, (1054), 871 states have internal predecessors, (1054), 192 states have call successors, (192), 153 states have call predecessors, (192), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-03 03:30:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1437 transitions. [2022-11-03 03:30:38,994 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1437 transitions. Word has length 67 [2022-11-03 03:30:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:38,995 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 1437 transitions. [2022-11-03 03:30:38,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:30:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1437 transitions. [2022-11-03 03:30:38,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:30:38,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:38,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:38,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:30:38,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash 804736956, now seen corresponding path program 1 times [2022-11-03 03:30:39,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:39,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640403899] [2022-11-03 03:30:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:39,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:39,151 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 03:30:39,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640403899] [2022-11-03 03:30:39,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640403899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:39,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:39,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:30:39,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209542700] [2022-11-03 03:30:39,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:39,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:39,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:39,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:39,155 INFO L87 Difference]: Start difference. First operand 1214 states and 1437 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 03:30:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:40,754 INFO L93 Difference]: Finished difference Result 2092 states and 2896 transitions. [2022-11-03 03:30:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:30:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 67 [2022-11-03 03:30:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:40,771 INFO L225 Difference]: With dead ends: 2092 [2022-11-03 03:30:40,771 INFO L226 Difference]: Without dead ends: 1911 [2022-11-03 03:30:40,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:30:40,775 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 1451 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:40,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1468 Valid, 1442 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:30:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-11-03 03:30:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1900. [2022-11-03 03:30:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1445 states have (on average 1.3397923875432527) internal successors, (1936), 1451 states have internal predecessors, (1936), 277 states have call successors, (277), 177 states have call predecessors, (277), 176 states have return successors, (338), 273 states have call predecessors, (338), 276 states have call successors, (338) [2022-11-03 03:30:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 2551 transitions. [2022-11-03 03:30:41,199 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 2551 transitions. Word has length 67 [2022-11-03 03:30:41,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:41,200 INFO L495 AbstractCegarLoop]: Abstraction has 1900 states and 2551 transitions. [2022-11-03 03:30:41,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 03:30:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 2551 transitions. [2022-11-03 03:30:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 03:30:41,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:41,202 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:41,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:30:41,203 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash -498593909, now seen corresponding path program 1 times [2022-11-03 03:30:41,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973564274] [2022-11-03 03:30:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:41,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:30:41,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:41,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973564274] [2022-11-03 03:30:41,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973564274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:41,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:41,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:41,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014830559] [2022-11-03 03:30:41,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:41,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:41,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:41,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:41,266 INFO L87 Difference]: Start difference. First operand 1900 states and 2551 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:30:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:41,799 INFO L93 Difference]: Finished difference Result 2866 states and 3645 transitions. [2022-11-03 03:30:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:41,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-03 03:30:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:41,813 INFO L225 Difference]: With dead ends: 2866 [2022-11-03 03:30:41,813 INFO L226 Difference]: Without dead ends: 2076 [2022-11-03 03:30:41,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:41,820 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 37 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:41,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 650 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2022-11-03 03:30:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1947. [2022-11-03 03:30:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1484 states have (on average 1.3355795148247978) internal successors, (1982), 1490 states have internal predecessors, (1982), 281 states have call successors, (281), 181 states have call predecessors, (281), 180 states have return successors, (342), 277 states have call predecessors, (342), 280 states have call successors, (342) [2022-11-03 03:30:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2605 transitions. [2022-11-03 03:30:42,266 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2605 transitions. Word has length 71 [2022-11-03 03:30:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:42,266 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 2605 transitions. [2022-11-03 03:30:42,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:30:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2605 transitions. [2022-11-03 03:30:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 03:30:42,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:42,270 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:42,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:30:42,271 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:42,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1736977228, now seen corresponding path program 1 times [2022-11-03 03:30:42,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:42,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661469462] [2022-11-03 03:30:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:42,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:30:42,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661469462] [2022-11-03 03:30:42,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661469462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86096535] [2022-11-03 03:30:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:42,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:42,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:42,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:42,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:30:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:30:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:30:43,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:43,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86096535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:43,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:43,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-03 03:30:43,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641209966] [2022-11-03 03:30:43,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:43,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:43,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:43,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:30:43,068 INFO L87 Difference]: Start difference. First operand 1947 states and 2605 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:30:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:43,857 INFO L93 Difference]: Finished difference Result 2809 states and 3609 transitions. [2022-11-03 03:30:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:30:43,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-03 03:30:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:43,868 INFO L225 Difference]: With dead ends: 2809 [2022-11-03 03:30:43,869 INFO L226 Difference]: Without dead ends: 1762 [2022-11-03 03:30:43,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:30:43,873 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 343 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:43,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1418 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:30:43,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-11-03 03:30:44,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1577. [2022-11-03 03:30:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1246 states have (on average 1.3731942215088282) internal successors, (1711), 1252 states have internal predecessors, (1711), 210 states have call successors, (210), 120 states have call predecessors, (210), 119 states have return successors, (271), 206 states have call predecessors, (271), 209 states have call successors, (271) [2022-11-03 03:30:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2192 transitions. [2022-11-03 03:30:44,193 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2192 transitions. Word has length 102 [2022-11-03 03:30:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:44,194 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2192 transitions. [2022-11-03 03:30:44,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:30:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2192 transitions. [2022-11-03 03:30:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 03:30:44,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:44,198 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:44,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 03:30:44,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:30:44,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1207127067, now seen corresponding path program 1 times [2022-11-03 03:30:44,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:44,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922663035] [2022-11-03 03:30:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:44,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:30:44,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:44,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922663035] [2022-11-03 03:30:44,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922663035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:44,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380311642] [2022-11-03 03:30:44,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:44,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:44,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:44,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:44,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:30:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:30:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:30:45,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:45,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380311642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:45,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:45,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 03:30:45,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126735791] [2022-11-03 03:30:45,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:45,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:30:45,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:45,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:30:45,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:30:45,047 INFO L87 Difference]: Start difference. First operand 1577 states and 2192 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:30:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:45,746 INFO L93 Difference]: Finished difference Result 2126 states and 2817 transitions. [2022-11-03 03:30:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:30:45,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-03 03:30:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:45,757 INFO L225 Difference]: With dead ends: 2126 [2022-11-03 03:30:45,757 INFO L226 Difference]: Without dead ends: 1533 [2022-11-03 03:30:45,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:30:45,763 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 66 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:45,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 2017 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:30:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-11-03 03:30:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1441. [2022-11-03 03:30:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1146 states have (on average 1.3909249563699826) internal successors, (1594), 1152 states have internal predecessors, (1594), 191 states have call successors, (191), 103 states have call predecessors, (191), 102 states have return successors, (252), 187 states have call predecessors, (252), 190 states have call successors, (252) [2022-11-03 03:30:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2037 transitions. [2022-11-03 03:30:46,134 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2037 transitions. Word has length 112 [2022-11-03 03:30:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:46,135 INFO L495 AbstractCegarLoop]: Abstraction has 1441 states and 2037 transitions. [2022-11-03 03:30:46,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:30:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2037 transitions. [2022-11-03 03:30:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 03:30:46,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:46,140 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:46,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:46,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:30:46,356 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:46,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1506468972, now seen corresponding path program 1 times [2022-11-03 03:30:46,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:46,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872566229] [2022-11-03 03:30:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:46,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:30:46,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:46,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872566229] [2022-11-03 03:30:46,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872566229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:46,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608534787] [2022-11-03 03:30:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:46,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:46,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:46,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:46,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:30:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:30:46,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:30:46,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:46,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608534787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:46,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:46,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-03 03:30:46,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126948544] [2022-11-03 03:30:46,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:46,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:46,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:46,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:30:46,960 INFO L87 Difference]: Start difference. First operand 1441 states and 2037 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:30:47,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:47,552 INFO L93 Difference]: Finished difference Result 2190 states and 2882 transitions. [2022-11-03 03:30:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:30:47,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-03 03:30:47,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:47,564 INFO L225 Difference]: With dead ends: 2190 [2022-11-03 03:30:47,564 INFO L226 Difference]: Without dead ends: 1733 [2022-11-03 03:30:47,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:30:47,567 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 329 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:47,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1450 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:30:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-03 03:30:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1699. [2022-11-03 03:30:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1308 states have (on average 1.356269113149847) internal successors, (1774), 1320 states have internal predecessors, (1774), 239 states have call successors, (239), 145 states have call predecessors, (239), 150 states have return successors, (312), 235 states have call predecessors, (312), 238 states have call successors, (312) [2022-11-03 03:30:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2325 transitions. [2022-11-03 03:30:47,960 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2325 transitions. Word has length 113 [2022-11-03 03:30:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:47,960 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2325 transitions. [2022-11-03 03:30:47,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:30:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2325 transitions. [2022-11-03 03:30:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:30:47,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:47,964 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:48,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 03:30:48,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:30:48,192 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1962920700, now seen corresponding path program 1 times [2022-11-03 03:30:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:48,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241245654] [2022-11-03 03:30:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:48,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:30:49,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:49,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241245654] [2022-11-03 03:30:49,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241245654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:49,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426261760] [2022-11-03 03:30:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:49,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:49,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:49,396 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:49,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:30:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:49,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 03:30:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:30:50,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:30:52,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426261760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:52,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325426690] [2022-11-03 03:30:52,893 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 03:30:52,893 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:52,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:52,894 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:52,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:41,378 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 384 for LOIs [2022-11-03 03:32:42,555 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 336 for LOIs [2022-11-03 03:32:42,729 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 329 for LOIs [2022-11-03 03:32:42,938 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 396 for LOIs [2022-11-03 03:32:48,037 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 224 for LOIs [2022-11-03 03:32:48,692 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 173 for LOIs [2022-11-03 03:32:49,309 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 388 for LOIs [2022-11-03 03:32:50,340 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 411 for LOIs [2022-11-03 03:32:51,466 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:31,970 WARN L234 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 357 DAG size of output: 276 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:42,295 WARN L234 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 363 DAG size of output: 282 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:52,456 WARN L234 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 365 DAG size of output: 284 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:35:30,399 WARN L234 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 367 DAG size of output: 286 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:35:34,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60345#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (<= ~t12_i~0 0) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-11-03 03:35:34,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:35:34,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:35:34,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-03 03:35:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892545840] [2022-11-03 03:35:34,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:34,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 03:35:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 03:35:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=9948, Unknown=0, NotChecked=0, Total=10712 [2022-11-03 03:35:34,169 INFO L87 Difference]: Start difference. First operand 1699 states and 2325 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-03 03:36:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:00,356 INFO L93 Difference]: Finished difference Result 3989 states and 4979 transitions. [2022-11-03 03:36:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-03 03:36:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-03 03:36:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:00,377 INFO L225 Difference]: With dead ends: 3989 [2022-11-03 03:36:00,377 INFO L226 Difference]: Without dead ends: 3274 [2022-11-03 03:36:00,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 287 SyntacticMatches, 8 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40697 ImplicationChecksByTransitivity, 182.7s TimeCoverageRelationStatistics Valid=9160, Invalid=89122, Unknown=0, NotChecked=0, Total=98282 [2022-11-03 03:36:00,396 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 4540 mSDsluCounter, 5542 mSDsCounter, 0 mSdLazyCounter, 8886 mSolverCounterSat, 2237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4542 SdHoareTripleChecker+Valid, 5005 SdHoareTripleChecker+Invalid, 11123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2237 IncrementalHoareTripleChecker+Valid, 8886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:00,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4542 Valid, 5005 Invalid, 11123 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2237 Valid, 8886 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 03:36:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2022-11-03 03:36:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 1975. [2022-11-03 03:36:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1492 states have (on average 1.3304289544235925) internal successors, (1985), 1506 states have internal predecessors, (1985), 284 states have call successors, (284), 182 states have call predecessors, (284), 197 states have return successors, (369), 288 states have call predecessors, (369), 283 states have call successors, (369) [2022-11-03 03:36:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2638 transitions. [2022-11-03 03:36:00,904 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2638 transitions. Word has length 114 [2022-11-03 03:36:00,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:36:00,905 INFO L495 AbstractCegarLoop]: Abstraction has 1975 states and 2638 transitions. [2022-11-03 03:36:00,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-03 03:36:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2638 transitions. [2022-11-03 03:36:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 03:36:00,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:36:00,927 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:36:00,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:01,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:36:01,144 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:36:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:36:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash -851461587, now seen corresponding path program 1 times [2022-11-03 03:36:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:36:01,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942606836] [2022-11-03 03:36:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:01,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:36:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:36:01,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:36:01,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942606836] [2022-11-03 03:36:01,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942606836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:01,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627302629] [2022-11-03 03:36:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:01,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:01,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:01,668 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:36:01,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:36:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:36:01,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:36:02,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:36:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627302629] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:02,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:36:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-03 03:36:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527228073] [2022-11-03 03:36:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:36:02,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:36:02,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:36:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:36:02,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:36:02,342 INFO L87 Difference]: Start difference. First operand 1975 states and 2638 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:36:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:04,016 INFO L93 Difference]: Finished difference Result 3299 states and 4186 transitions. [2022-11-03 03:36:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:36:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-03 03:36:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:04,029 INFO L225 Difference]: With dead ends: 3299 [2022-11-03 03:36:04,030 INFO L226 Difference]: Without dead ends: 2308 [2022-11-03 03:36:04,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:36:04,034 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 508 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:04,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 986 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:36:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-11-03 03:36:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2055. [2022-11-03 03:36:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 1537 states have (on average 1.324658425504229) internal successors, (2036), 1554 states have internal predecessors, (2036), 303 states have call successors, (303), 191 states have call predecessors, (303), 213 states have return successors, (409), 311 states have call predecessors, (409), 302 states have call successors, (409) [2022-11-03 03:36:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 2748 transitions. [2022-11-03 03:36:04,547 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 2748 transitions. Word has length 115 [2022-11-03 03:36:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:36:04,547 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 2748 transitions. [2022-11-03 03:36:04,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:36:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 2748 transitions. [2022-11-03 03:36:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:36:04,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:36:04,552 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:36:04,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:04,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 03:36:04,768 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:36:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:36:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1559178268, now seen corresponding path program 1 times [2022-11-03 03:36:04,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:36:04,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794486068] [2022-11-03 03:36:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:04,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:36:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:36:05,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:36:05,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794486068] [2022-11-03 03:36:05,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794486068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:05,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676848705] [2022-11-03 03:36:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:05,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:05,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:05,769 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:36:05,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:36:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:05,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 03:36:05,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:36:07,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:36:08,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676848705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:08,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495025602] [2022-11-03 03:36:08,979 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 03:36:08,979 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:36:08,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:36:08,979 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:36:08,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:36:40,697 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 372 for LOIs [2022-11-03 03:36:41,921 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 321 for LOIs [2022-11-03 03:36:42,091 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 319 for LOIs [2022-11-03 03:36:42,286 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 384 for LOIs [2022-11-03 03:36:47,531 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 212 for LOIs [2022-11-03 03:36:48,288 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 160 for LOIs [2022-11-03 03:36:48,830 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 376 for LOIs [2022-11-03 03:36:50,177 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 399 for LOIs [2022-11-03 03:36:51,344 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:37:13,151 WARN L234 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 392 DAG size of output: 258 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:35,623 WARN L234 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 327 DAG size of output: 248 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:45,646 WARN L234 SmtUtils]: Spent 8.48s on a formula simplification. DAG size of input: 329 DAG size of output: 250 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:38:41,038 WARN L234 SmtUtils]: Spent 9.97s on a formula simplification. DAG size of input: 355 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:38:49,075 WARN L234 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 340 DAG size of output: 182 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:39:24,688 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '78749#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t11_i~0) (= 0 ~t2_st~0) (<= 2 ~T12_E~0) (<= 2 ~E_5~0) (= ~t12_st~0 0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (= ~t11_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (<= ~t11_i~0 0) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-11-03 03:39:24,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:39:24,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:39:24,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-03 03:39:24,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118238143] [2022-11-03 03:39:24,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:39:24,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 03:39:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 03:39:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=10477, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 03:39:24,693 INFO L87 Difference]: Start difference. First operand 2055 states and 2748 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 03:39:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:38,329 INFO L93 Difference]: Finished difference Result 4904 states and 6090 transitions. [2022-11-03 03:39:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-03 03:39:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-03 03:39:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:38,352 INFO L225 Difference]: With dead ends: 4904 [2022-11-03 03:39:38,353 INFO L226 Difference]: Without dead ends: 3833 [2022-11-03 03:39:38,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 310 SyntacticMatches, 5 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14920 ImplicationChecksByTransitivity, 161.3s TimeCoverageRelationStatistics Valid=3633, Invalid=32277, Unknown=0, NotChecked=0, Total=35910 [2022-11-03 03:39:38,391 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 4687 mSDsluCounter, 3169 mSDsCounter, 0 mSdLazyCounter, 5866 mSolverCounterSat, 2518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4688 SdHoareTripleChecker+Valid, 2963 SdHoareTripleChecker+Invalid, 8384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2518 IncrementalHoareTripleChecker+Valid, 5866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:38,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4688 Valid, 2963 Invalid, 8384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2518 Valid, 5866 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 03:39:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2022-11-03 03:39:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2592. [2022-11-03 03:39:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 1923 states have (on average 1.2922516900676027) internal successors, (2485), 1940 states have internal predecessors, (2485), 377 states have call successors, (377), 250 states have call predecessors, (377), 290 states have return successors, (501), 403 states have call predecessors, (501), 376 states have call successors, (501) [2022-11-03 03:39:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 3363 transitions. [2022-11-03 03:39:39,127 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 3363 transitions. Word has length 124 [2022-11-03 03:39:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:39,128 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 3363 transitions. [2022-11-03 03:39:39,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 03:39:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 3363 transitions. [2022-11-03 03:39:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 03:39:39,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:39,133 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:39,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:39,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:39,348 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:39,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1119827645, now seen corresponding path program 1 times [2022-11-03 03:39:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:39,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846664427] [2022-11-03 03:39:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:39,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:39:39,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846664427] [2022-11-03 03:39:39,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846664427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:39,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458088882] [2022-11-03 03:39:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:39,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:39,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:39,660 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:39,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:39:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:39:39,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:39:40,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 03:39:40,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458088882] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:40,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:39:40,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-03 03:39:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983406331] [2022-11-03 03:39:40,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:40,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:39:40,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:40,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:39:40,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:39:40,383 INFO L87 Difference]: Start difference. First operand 2592 states and 3363 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:39:42,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:42,180 INFO L93 Difference]: Finished difference Result 3551 states and 4454 transitions. [2022-11-03 03:39:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:39:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-03 03:39:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:42,194 INFO L225 Difference]: With dead ends: 3551 [2022-11-03 03:39:42,194 INFO L226 Difference]: Without dead ends: 1943 [2022-11-03 03:39:42,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:39:42,199 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 789 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:42,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 916 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:39:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2022-11-03 03:39:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1602. [2022-11-03 03:39:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1226 states have (on average 1.3564437194127243) internal successors, (1663), 1242 states have internal predecessors, (1663), 227 states have call successors, (227), 129 states have call predecessors, (227), 147 states have return successors, (318), 232 states have call predecessors, (318), 226 states have call successors, (318) [2022-11-03 03:39:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2208 transitions. [2022-11-03 03:39:42,649 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2208 transitions. Word has length 125 [2022-11-03 03:39:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:42,649 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2208 transitions. [2022-11-03 03:39:42,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:39:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2208 transitions. [2022-11-03 03:39:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:39:42,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:42,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:42,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:42,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:42,853 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:42,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1968759868, now seen corresponding path program 1 times [2022-11-03 03:39:42,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:42,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394822332] [2022-11-03 03:39:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:42,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:39:43,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:43,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394822332] [2022-11-03 03:39:43,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394822332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:43,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047936339] [2022-11-03 03:39:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:43,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:43,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:43,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:43,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:39:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:39:43,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:39:43,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:43,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047936339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:43,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:39:43,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:39:43,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066188309] [2022-11-03 03:39:43,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:43,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:43,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:43,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:43,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:43,460 INFO L87 Difference]: Start difference. First operand 1602 states and 2208 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 03:39:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:44,351 INFO L93 Difference]: Finished difference Result 3320 states and 5092 transitions. [2022-11-03 03:39:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 136 [2022-11-03 03:39:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:44,384 INFO L225 Difference]: With dead ends: 3320 [2022-11-03 03:39:44,384 INFO L226 Difference]: Without dead ends: 2453 [2022-11-03 03:39:44,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 03:39:44,390 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 321 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:44,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:39:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2022-11-03 03:39:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2446. [2022-11-03 03:39:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 1938 states have (on average 1.4169246646026832) internal successors, (2746), 1957 states have internal predecessors, (2746), 329 states have call successors, (329), 159 states have call predecessors, (329), 177 states have return successors, (478), 331 states have call predecessors, (478), 328 states have call successors, (478) [2022-11-03 03:39:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3553 transitions. [2022-11-03 03:39:44,908 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3553 transitions. Word has length 136 [2022-11-03 03:39:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:44,908 INFO L495 AbstractCegarLoop]: Abstraction has 2446 states and 3553 transitions. [2022-11-03 03:39:44,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 03:39:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3553 transitions. [2022-11-03 03:39:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:39:44,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:44,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:44,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:45,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 03:39:45,113 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:45,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:45,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1393679196, now seen corresponding path program 1 times [2022-11-03 03:39:45,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:45,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79740956] [2022-11-03 03:39:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:45,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:39:45,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:45,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79740956] [2022-11-03 03:39:45,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79740956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:45,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052192694] [2022-11-03 03:39:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:45,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:45,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:45,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:45,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:39:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:45,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:39:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:45,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:45,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052192694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:45,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:39:45,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:39:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313236254] [2022-11-03 03:39:45,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:45,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:45,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:45,635 INFO L87 Difference]: Start difference. First operand 2446 states and 3553 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 03:39:46,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:46,564 INFO L93 Difference]: Finished difference Result 5837 states and 9219 transitions. [2022-11-03 03:39:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:46,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 136 [2022-11-03 03:39:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:46,587 INFO L225 Difference]: With dead ends: 5837 [2022-11-03 03:39:46,588 INFO L226 Difference]: Without dead ends: 4126 [2022-11-03 03:39:46,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 03:39:46,598 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 324 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:46,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:39:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2022-11-03 03:39:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 4114. [2022-11-03 03:39:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 3347 states have (on average 1.4586196593964744) internal successors, (4882), 3372 states have internal predecessors, (4882), 528 states have call successors, (528), 219 states have call predecessors, (528), 237 states have return successors, (789), 524 states have call predecessors, (789), 527 states have call successors, (789) [2022-11-03 03:39:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 6199 transitions. [2022-11-03 03:39:47,366 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 6199 transitions. Word has length 136 [2022-11-03 03:39:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:47,367 INFO L495 AbstractCegarLoop]: Abstraction has 4114 states and 6199 transitions. [2022-11-03 03:39:47,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 03:39:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 6199 transitions. [2022-11-03 03:39:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:39:47,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:47,377 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, 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 03:39:47,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-03 03:39:47,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 03:39:47,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:47,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1789923388, now seen corresponding path program 1 times [2022-11-03 03:39:47,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:47,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104645701] [2022-11-03 03:39:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:47,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:39:47,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:47,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104645701] [2022-11-03 03:39:47,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104645701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:47,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466697455] [2022-11-03 03:39:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:47,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:47,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:47,787 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:47,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:39:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:39:48,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:39:48,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:48,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466697455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:48,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:39:48,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:39:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114653021] [2022-11-03 03:39:48,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:48,129 INFO L87 Difference]: Start difference. First operand 4114 states and 6199 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 03:39:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:49,442 INFO L93 Difference]: Finished difference Result 10811 states and 17332 transitions. [2022-11-03 03:39:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:49,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 136 [2022-11-03 03:39:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:49,472 INFO L225 Difference]: With dead ends: 10811 [2022-11-03 03:39:49,472 INFO L226 Difference]: Without dead ends: 7432 [2022-11-03 03:39:49,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 03:39:49,490 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 345 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:49,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:39:49,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2022-11-03 03:39:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 7410. [2022-11-03 03:39:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 6135 states have (on average 1.4823145884270579) internal successors, (9094), 6172 states have internal predecessors, (9094), 916 states have call successors, (916), 339 states have call predecessors, (916), 357 states have return successors, (1393), 900 states have call predecessors, (1393), 915 states have call successors, (1393) [2022-11-03 03:39:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 11403 transitions. [2022-11-03 03:39:50,584 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 11403 transitions. Word has length 136 [2022-11-03 03:39:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:50,584 INFO L495 AbstractCegarLoop]: Abstraction has 7410 states and 11403 transitions. [2022-11-03 03:39:50,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 03:39:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 11403 transitions. [2022-11-03 03:39:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:39:50,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:50,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:50,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-03 03:39:50,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 03:39:50,816 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1061312676, now seen corresponding path program 1 times [2022-11-03 03:39:50,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:50,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341073481] [2022-11-03 03:39:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:50,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:39:50,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341073481] [2022-11-03 03:39:50,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341073481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612474842] [2022-11-03 03:39:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:50,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:50,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:50,990 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:51,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:39:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:39:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:39:51,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:51,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612474842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:51,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:39:51,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:39:51,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910538543] [2022-11-03 03:39:51,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:51,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:51,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:51,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:51,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:51,368 INFO L87 Difference]: Start difference. First operand 7410 states and 11403 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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 03:39:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:53,921 INFO L93 Difference]: Finished difference Result 20639 states and 33276 transitions. [2022-11-03 03:39:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:53,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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 136 [2022-11-03 03:39:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:53,994 INFO L225 Difference]: With dead ends: 20639 [2022-11-03 03:39:53,995 INFO L226 Difference]: Without dead ends: 13964 [2022-11-03 03:39:54,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 03:39:54,030 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 336 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:54,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:39:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13964 states. [2022-11-03 03:39:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13964 to 13922. [2022-11-03 03:39:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13922 states, 11651 states have (on average 1.4932623809115098) internal successors, (17398), 11712 states have internal predecessors, (17398), 1672 states have call successors, (1672), 579 states have call predecessors, (1672), 597 states have return successors, (2565), 1632 states have call predecessors, (2565), 1671 states have call successors, (2565) [2022-11-03 03:39:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13922 states to 13922 states and 21635 transitions. [2022-11-03 03:39:56,262 INFO L78 Accepts]: Start accepts. Automaton has 13922 states and 21635 transitions. Word has length 136 [2022-11-03 03:39:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:56,263 INFO L495 AbstractCegarLoop]: Abstraction has 13922 states and 21635 transitions. [2022-11-03 03:39:56,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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 03:39:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 13922 states and 21635 transitions. [2022-11-03 03:39:56,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:39:56,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:56,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:56,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:56,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 03:39:56,496 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1420587972, now seen corresponding path program 1 times [2022-11-03 03:39:56,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:56,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268474048] [2022-11-03 03:39:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:56,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:39:56,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268474048] [2022-11-03 03:39:56,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268474048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444515404] [2022-11-03 03:39:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:56,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:56,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:56,672 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:56,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:39:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:39:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:39:57,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:57,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444515404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:57,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:39:57,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:39:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493278988] [2022-11-03 03:39:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:57,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:57,060 INFO L87 Difference]: Start difference. First operand 13922 states and 21635 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 03:40:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:02,063 INFO L93 Difference]: Finished difference Result 40055 states and 64600 transitions. [2022-11-03 03:40:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:40:02,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 136 [2022-11-03 03:40:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:02,237 INFO L225 Difference]: With dead ends: 40055 [2022-11-03 03:40:02,237 INFO L226 Difference]: Without dead ends: 26868 [2022-11-03 03:40:02,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 03:40:02,308 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 342 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:02,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:40:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26868 states. [2022-11-03 03:40:07,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26868 to 26786. [2022-11-03 03:40:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26786 states, 22563 states have (on average 1.4965208527234855) internal successors, (33766), 22672 states have internal predecessors, (33766), 3144 states have call successors, (3144), 1059 states have call predecessors, (3144), 1077 states have return successors, (4837), 3056 states have call predecessors, (4837), 3143 states have call successors, (4837) [2022-11-03 03:40:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26786 states to 26786 states and 41747 transitions. [2022-11-03 03:40:07,371 INFO L78 Accepts]: Start accepts. Automaton has 26786 states and 41747 transitions. Word has length 136 [2022-11-03 03:40:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:07,372 INFO L495 AbstractCegarLoop]: Abstraction has 26786 states and 41747 transitions. [2022-11-03 03:40:07,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 03:40:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 26786 states and 41747 transitions. [2022-11-03 03:40:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:40:07,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:07,434 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:40:07,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:07,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 03:40:07,660 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:07,661 INFO L85 PathProgramCache]: Analyzing trace with hash -396211940, now seen corresponding path program 1 times [2022-11-03 03:40:07,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:07,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436179542] [2022-11-03 03:40:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:07,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:40:07,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436179542] [2022-11-03 03:40:07,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436179542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:40:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671125085] [2022-11-03 03:40:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:07,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:07,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:07,876 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:07,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed8b843-c510-4ab0-b76e-e7b7d1ab5905/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:40:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:08,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:40:08,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:40:08,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:40:08,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671125085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:08,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:40:08,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:40:08,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657560777] [2022-11-03 03:40:08,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:08,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:40:08,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:08,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:40:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:40:08,291 INFO L87 Difference]: Start difference. First operand 26786 states and 41747 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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)