./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0 --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 6d55d399b7f413c968459e57be858565c9c3a03797404fd2613513b79af9aeb3 --- 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-e04fb08 [2022-11-16 16:26:16,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:26:16,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:26:16,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:26:16,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:26:16,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:26:16,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:26:16,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:26:16,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:26:16,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:26:16,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:26:16,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:26:16,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:26:16,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:26:16,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:26:16,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:26:16,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:26:16,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:26:16,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:26:16,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:26:16,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:26:16,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:26:16,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:26:16,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:26:16,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:26:16,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:26:16,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:26:16,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:26:16,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:26:16,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:26:16,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:26:16,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:26:16,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:26:16,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:26:16,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:26:16,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:26:16,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:26:16,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:26:16,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:26:16,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:26:16,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:26:16,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 16:26:16,177 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:26:16,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:26:16,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:26:16,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:26:16,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:26:16,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:26:16,180 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:26:16,180 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:26:16,180 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:26:16,181 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:26:16,182 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:26:16,182 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:26:16,182 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:26:16,183 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:26:16,183 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:26:16,183 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:26:16,183 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:26:16,183 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:26:16,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:26:16,184 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:26:16,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:26:16,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:26:16,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:26:16,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:26:16,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:26:16,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:26:16,186 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:26:16,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:26:16,186 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:26:16,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:26:16,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:26:16,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:26:16,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:26:16,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:26:16,188 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:26:16,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:26:16,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:26:16,188 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:26:16,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:26:16,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:26:16,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:26:16,190 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_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d55d399b7f413c968459e57be858565c9c3a03797404fd2613513b79af9aeb3 [2022-11-16 16:26:16,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:26:16,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:26:16,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:26:16,529 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:26:16,531 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:26:16,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2022-11-16 16:26:16,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/data/4850c26f7/a4cc5bfed2274f62b4896b9ecb59fdc6/FLAGb00738478 [2022-11-16 16:26:17,171 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:26:17,172 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2022-11-16 16:26:17,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/data/4850c26f7/a4cc5bfed2274f62b4896b9ecb59fdc6/FLAGb00738478 [2022-11-16 16:26:17,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/data/4850c26f7/a4cc5bfed2274f62b4896b9ecb59fdc6 [2022-11-16 16:26:17,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:26:17,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:26:17,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:26:17,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:26:17,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:26:17,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:26:17" (1/1) ... [2022-11-16 16:26:17,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2adfff62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:17, skipping insertion in model container [2022-11-16 16:26:17,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:26:17" (1/1) ... [2022-11-16 16:26:17,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:26:17,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:26:17,862 WARN L229 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_95608fc0-6865-4e70-b627-e148df07e4ac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[913,926] [2022-11-16 16:26:17,911 WARN L229 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_95608fc0-6865-4e70-b627-e148df07e4ac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[5977,5990] [2022-11-16 16:26:18,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:26:18,026 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:26:18,040 WARN L229 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_95608fc0-6865-4e70-b627-e148df07e4ac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[913,926] [2022-11-16 16:26:18,057 WARN L229 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_95608fc0-6865-4e70-b627-e148df07e4ac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[5977,5990] [2022-11-16 16:26:18,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:26:18,169 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:26:18,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18 WrapperNode [2022-11-16 16:26:18,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:26:18,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:26:18,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:26:18,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:26:18,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,245 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 881 [2022-11-16 16:26:18,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:26:18,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:26:18,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:26:18,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:26:18,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,292 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:26:18,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:26:18,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:26:18,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:26:18,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (1/1) ... [2022-11-16 16:26:18,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:26:18,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:26:18,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:26:18,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:26:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:26:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 16:26:18,377 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 16:26:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-16 16:26:18,378 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-16 16:26:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 16:26:18,378 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 16:26:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 16:26:18,378 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 16:26:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 16:26:18,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 16:26:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 16:26:18,379 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 16:26:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 16:26:18,379 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 16:26:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:26:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 16:26:18,380 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 16:26:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:26:18,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:26:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 16:26:18,381 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 16:26:18,515 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:26:18,518 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:26:19,698 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:26:20,202 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:26:20,203 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-16 16:26:20,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:26:20 BoogieIcfgContainer [2022-11-16 16:26:20,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:26:20,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:26:20,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:26:20,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:26:20,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:26:17" (1/3) ... [2022-11-16 16:26:20,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ba8e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:26:20, skipping insertion in model container [2022-11-16 16:26:20,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:26:18" (2/3) ... [2022-11-16 16:26:20,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ba8e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:26:20, skipping insertion in model container [2022-11-16 16:26:20,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:26:20" (3/3) ... [2022-11-16 16:26:20,218 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2022-11-16 16:26:20,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:26:20,241 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 16:26:20,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:26:20,351 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;@f2f2ad2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:26:20,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 16:26:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 165 states have (on average 1.5575757575757576) internal successors, (257), 170 states have internal predecessors, (257), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-16 16:26:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 16:26:20,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:20,376 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] [2022-11-16 16:26:20,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:26:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash 8035567, now seen corresponding path program 1 times [2022-11-16 16:26:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:26:20,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353513135] [2022-11-16 16:26:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:26:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:20,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:26:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353513135] [2022-11-16 16:26:20,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353513135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:20,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:20,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:26:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075461259] [2022-11-16 16:26:20,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:20,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:20,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:26:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:20,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:20,907 INFO L87 Difference]: Start difference. First operand has 206 states, 165 states have (on average 1.5575757575757576) internal successors, (257), 170 states have internal predecessors, (257), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:26:21,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:21,259 INFO L93 Difference]: Finished difference Result 445 states and 678 transitions. [2022-11-16 16:26:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:21,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-16 16:26:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:21,280 INFO L225 Difference]: With dead ends: 445 [2022-11-16 16:26:21,281 INFO L226 Difference]: Without dead ends: 239 [2022-11-16 16:26:21,286 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 [2022-11-16 16:26:21,294 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 282 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:21,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 323 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:26:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-16 16:26:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2022-11-16 16:26:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 191 states have (on average 1.486910994764398) internal successors, (284), 194 states have internal predecessors, (284), 32 states have call successors, (32), 11 states have call predecessors, (32), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-16 16:26:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-11-16 16:26:21,390 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 28 [2022-11-16 16:26:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:21,391 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-11-16 16:26:21,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:26:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-11-16 16:26:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 16:26:21,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:21,395 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] [2022-11-16 16:26:21,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:26:21,396 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:26:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1246041309, now seen corresponding path program 1 times [2022-11-16 16:26:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:26:21,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359176242] [2022-11-16 16:26:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:21,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:26:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:21,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:26:21,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359176242] [2022-11-16 16:26:21,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359176242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:21,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:21,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:26:21,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024537233] [2022-11-16 16:26:21,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:21,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:21,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:26:21,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:21,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:21,501 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:26:21,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:21,696 INFO L93 Difference]: Finished difference Result 391 states and 563 transitions. [2022-11-16 16:26:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:21,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-16 16:26:21,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:21,701 INFO L225 Difference]: With dead ends: 391 [2022-11-16 16:26:21,701 INFO L226 Difference]: Without dead ends: 310 [2022-11-16 16:26:21,703 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 [2022-11-16 16:26:21,704 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 280 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:21,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 308 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:26:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-16 16:26:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2022-11-16 16:26:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 251 states have (on average 1.454183266932271) internal successors, (365), 254 states have internal predecessors, (365), 39 states have call successors, (39), 15 states have call predecessors, (39), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-16 16:26:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 441 transitions. [2022-11-16 16:26:21,748 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 441 transitions. Word has length 29 [2022-11-16 16:26:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:21,749 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 441 transitions. [2022-11-16 16:26:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:26:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 441 transitions. [2022-11-16 16:26:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 16:26:21,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:21,760 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] [2022-11-16 16:26:21,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 16:26:21,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:26:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:21,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1710403328, now seen corresponding path program 1 times [2022-11-16 16:26:21,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:26:21,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99552107] [2022-11-16 16:26:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:21,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:26:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:21,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:26:21,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99552107] [2022-11-16 16:26:21,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99552107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:21,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:21,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:26:21,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643763817] [2022-11-16 16:26:21,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:21,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:21,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:26:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:21,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:21,882 INFO L87 Difference]: Start difference. First operand 306 states and 441 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:26:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:22,054 INFO L93 Difference]: Finished difference Result 546 states and 769 transitions. [2022-11-16 16:26:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-16 16:26:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:22,059 INFO L225 Difference]: With dead ends: 546 [2022-11-16 16:26:22,059 INFO L226 Difference]: Without dead ends: 394 [2022-11-16 16:26:22,061 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 [2022-11-16 16:26:22,062 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 46 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:22,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 501 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:26:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-16 16:26:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 380. [2022-11-16 16:26:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 314 states have (on average 1.4331210191082802) internal successors, (450), 319 states have internal predecessors, (450), 45 states have call successors, (45), 20 states have call predecessors, (45), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-16 16:26:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 538 transitions. [2022-11-16 16:26:22,113 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 538 transitions. Word has length 30 [2022-11-16 16:26:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:22,114 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 538 transitions. [2022-11-16 16:26:22,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:26:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 538 transitions. [2022-11-16 16:26:22,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 16:26:22,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:22,118 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] [2022-11-16 16:26:22,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 16:26:22,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:26:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:22,119 INFO L85 PathProgramCache]: Analyzing trace with hash -484523149, now seen corresponding path program 1 times [2022-11-16 16:26:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:26:22,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653847477] [2022-11-16 16:26:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:22,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:26:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:26:22,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:26:22,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653847477] [2022-11-16 16:26:22,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653847477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:22,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:22,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:26:22,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565300866] [2022-11-16 16:26:22,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:22,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:26:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:22,228 INFO L87 Difference]: Start difference. First operand 380 states and 538 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:26:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:22,384 INFO L93 Difference]: Finished difference Result 543 states and 756 transitions. [2022-11-16 16:26:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:22,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-11-16 16:26:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:22,390 INFO L225 Difference]: With dead ends: 543 [2022-11-16 16:26:22,390 INFO L226 Difference]: Without dead ends: 385 [2022-11-16 16:26:22,391 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 [2022-11-16 16:26:22,394 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 32 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:22,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 533 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:26:22,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-16 16:26:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 374. [2022-11-16 16:26:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 308 states have (on average 1.4155844155844155) internal successors, (436), 313 states have internal predecessors, (436), 45 states have call successors, (45), 20 states have call predecessors, (45), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-16 16:26:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 524 transitions. [2022-11-16 16:26:22,436 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 524 transitions. Word has length 43 [2022-11-16 16:26:22,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:22,437 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 524 transitions. [2022-11-16 16:26:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:26:22,437 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 524 transitions. [2022-11-16 16:26:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 16:26:22,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:22,440 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] [2022-11-16 16:26:22,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 16:26:22,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:26:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:22,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1511119967, now seen corresponding path program 1 times [2022-11-16 16:26:22,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:26:22,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516578521] [2022-11-16 16:26:22,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:22,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:26:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 16:26:22,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:26:22,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516578521] [2022-11-16 16:26:22,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516578521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:22,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:22,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:26:22,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065937747] [2022-11-16 16:26:22,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:22,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:22,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:26:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:22,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:22,503 INFO L87 Difference]: Start difference. First operand 374 states and 524 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 16:26:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:22,646 INFO L93 Difference]: Finished difference Result 623 states and 848 transitions. [2022-11-16 16:26:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:22,647 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-16 16:26:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:22,651 INFO L225 Difference]: With dead ends: 623 [2022-11-16 16:26:22,651 INFO L226 Difference]: Without dead ends: 420 [2022-11-16 16:26:22,652 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 [2022-11-16 16:26:22,660 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 266 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:22,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 306 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:26:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-16 16:26:22,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-11-16 16:26:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 347 states have (on average 1.3804034582132565) internal successors, (479), 352 states have internal predecessors, (479), 49 states have call successors, (49), 23 states have call predecessors, (49), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-16 16:26:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 575 transitions. [2022-11-16 16:26:22,710 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 575 transitions. Word has length 46 [2022-11-16 16:26:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:22,710 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 575 transitions. [2022-11-16 16:26:22,711 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 16:26:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 575 transitions. [2022-11-16 16:26:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 16:26:22,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:22,720 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:26:22,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 16:26:22,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:26:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:22,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1424918831, now seen corresponding path program 1 times [2022-11-16 16:26:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:26:22,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77233173] [2022-11-16 16:26:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:26:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:26:22,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:26:22,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77233173] [2022-11-16 16:26:22,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77233173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:22,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:22,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:26:22,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147183090] [2022-11-16 16:26:22,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:22,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:26:22,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:26:22,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:26:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:26:22,880 INFO L87 Difference]: Start difference. First operand 420 states and 575 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:26:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:23,143 INFO L93 Difference]: Finished difference Result 460 states and 622 transitions. [2022-11-16 16:26:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:26:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-11-16 16:26:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:23,147 INFO L225 Difference]: With dead ends: 460 [2022-11-16 16:26:23,147 INFO L226 Difference]: Without dead ends: 457 [2022-11-16 16:26:23,148 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 [2022-11-16 16:26:23,149 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 488 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:23,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 304 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:26:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-16 16:26:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 419. [2022-11-16 16:26:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 347 states have (on average 1.3746397694524495) internal successors, (477), 351 states have internal predecessors, (477), 48 states have call successors, (48), 23 states have call predecessors, (48), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-16 16:26:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 572 transitions. [2022-11-16 16:26:23,190 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 572 transitions. Word has length 47 [2022-11-16 16:26:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:23,191 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 572 transitions. [2022-11-16 16:26:23,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:26:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 572 transitions. [2022-11-16 16:26:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 16:26:23,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:23,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:23,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 16:26:23,194 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:26:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1223983838, now seen corresponding path program 1 times [2022-11-16 16:26:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:26:23,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785894136] [2022-11-16 16:26:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:23,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:26:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:26:23,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:26:23,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785894136] [2022-11-16 16:26:23,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785894136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:26:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043699808] [2022-11-16 16:26:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:23,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:26:23,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:26:23,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:26:23,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 16:26:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:26:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:23,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:26:24,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043699808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:24,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342310566] [2022-11-16 16:26:24,155 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-16 16:26:24,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:26:24,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:26:24,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:26:24,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:26:29,341 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 155 for LOIs [2022-11-16 16:26:29,364 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 170 for LOIs [2022-11-16 16:26:29,393 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 356 for LOIs [2022-11-16 16:26:32,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:26:43,526 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 345 DAG size of output: 263 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:27:04,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7894#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~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) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~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) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 16:27:04,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:27:04,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:27:04,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-16 16:27:04,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201733558] [2022-11-16 16:27:04,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:27:04,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:27:04,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:04,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:27:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 16:27:04,330 INFO L87 Difference]: Start difference. First operand 419 states and 572 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:27:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:04,793 INFO L93 Difference]: Finished difference Result 862 states and 1140 transitions. [2022-11-16 16:27:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:27:04,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-16 16:27:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:04,805 INFO L225 Difference]: With dead ends: 862 [2022-11-16 16:27:04,805 INFO L226 Difference]: Without dead ends: 859 [2022-11-16 16:27:04,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 16:27:04,808 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 650 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:04,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 855 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:27:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-11-16 16:27:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 628. [2022-11-16 16:27:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 524 states have (on average 1.3549618320610688) internal successors, (710), 530 states have internal predecessors, (710), 67 states have call successors, (67), 36 states have call predecessors, (67), 35 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-16 16:27:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 843 transitions. [2022-11-16 16:27:04,877 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 843 transitions. Word has length 48 [2022-11-16 16:27:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:04,878 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 843 transitions. [2022-11-16 16:27:04,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:27:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 843 transitions. [2022-11-16 16:27:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 16:27:04,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:04,880 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] [2022-11-16 16:27:04,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 16:27:05,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:05,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2013164590, now seen corresponding path program 1 times [2022-11-16 16:27:05,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:05,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131396990] [2022-11-16 16:27:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:05,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:05,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131396990] [2022-11-16 16:27:05,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131396990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:05,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:05,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:27:05,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172280088] [2022-11-16 16:27:05,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:05,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:27:05,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:27:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:27:05,211 INFO L87 Difference]: Start difference. First operand 628 states and 843 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2022-11-16 16:27:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:06,135 INFO L93 Difference]: Finished difference Result 1341 states and 2011 transitions. [2022-11-16 16:27:06,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:27:06,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 58 [2022-11-16 16:27:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:06,146 INFO L225 Difference]: With dead ends: 1341 [2022-11-16 16:27:06,146 INFO L226 Difference]: Without dead ends: 1193 [2022-11-16 16:27:06,147 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 [2022-11-16 16:27:06,152 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1157 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:06,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1171 Valid, 1156 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 16:27:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-11-16 16:27:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1182. [2022-11-16 16:27:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 981 states have (on average 1.4271151885830784) internal successors, (1400), 990 states have internal predecessors, (1400), 140 states have call successors, (140), 60 states have call predecessors, (140), 59 states have return successors, (189), 132 states have call predecessors, (189), 139 states have call successors, (189) [2022-11-16 16:27:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1729 transitions. [2022-11-16 16:27:06,268 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1729 transitions. Word has length 58 [2022-11-16 16:27:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:06,269 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1729 transitions. [2022-11-16 16:27:06,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2022-11-16 16:27:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1729 transitions. [2022-11-16 16:27:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 16:27:06,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:06,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-16 16:27:06,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 16:27:06,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:06,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:06,274 INFO L85 PathProgramCache]: Analyzing trace with hash 986777866, now seen corresponding path program 2 times [2022-11-16 16:27:06,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:06,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720627397] [2022-11-16 16:27:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:06,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 16:27:06,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:06,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720627397] [2022-11-16 16:27:06,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720627397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:06,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:06,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:06,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710859410] [2022-11-16 16:27:06,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:06,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:06,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:06,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:06,360 INFO L87 Difference]: Start difference. First operand 1182 states and 1729 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 16:27:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:06,536 INFO L93 Difference]: Finished difference Result 1512 states and 2162 transitions. [2022-11-16 16:27:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:06,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-11-16 16:27:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:06,543 INFO L225 Difference]: With dead ends: 1512 [2022-11-16 16:27:06,544 INFO L226 Difference]: Without dead ends: 1124 [2022-11-16 16:27:06,546 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 [2022-11-16 16:27:06,549 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 279 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:06,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 319 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-16 16:27:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1115. [2022-11-16 16:27:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 924 states have (on average 1.4274891774891776) internal successors, (1319), 934 states have internal predecessors, (1319), 134 states have call successors, (134), 56 states have call predecessors, (134), 55 states have return successors, (183), 125 states have call predecessors, (183), 133 states have call successors, (183) [2022-11-16 16:27:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1636 transitions. [2022-11-16 16:27:06,660 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1636 transitions. Word has length 61 [2022-11-16 16:27:06,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:06,661 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 1636 transitions. [2022-11-16 16:27:06,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 16:27:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1636 transitions. [2022-11-16 16:27:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 16:27:06,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:06,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:06,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 16:27:06,665 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash 456459081, now seen corresponding path program 1 times [2022-11-16 16:27:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:06,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30082391] [2022-11-16 16:27:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:06,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:27:06,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:06,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30082391] [2022-11-16 16:27:06,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30082391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:27:06,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149574011] [2022-11-16 16:27:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:06,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:06,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:06,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:27:06,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 16:27:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:07,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:27:07,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:27:07,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:07,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149574011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:07,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:27:07,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 16:27:07,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338917816] [2022-11-16 16:27:07,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:07,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:07,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:07,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:07,080 INFO L87 Difference]: Start difference. First operand 1115 states and 1636 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 16:27:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:07,328 INFO L93 Difference]: Finished difference Result 1242 states and 1795 transitions. [2022-11-16 16:27:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:07,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-11-16 16:27:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:07,336 INFO L225 Difference]: With dead ends: 1242 [2022-11-16 16:27:07,336 INFO L226 Difference]: Without dead ends: 708 [2022-11-16 16:27:07,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:07,341 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 25 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:07,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 504 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-11-16 16:27:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 708. [2022-11-16 16:27:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 581 states have (on average 1.5094664371772806) internal successors, (877), 585 states have internal predecessors, (877), 96 states have call successors, (96), 30 states have call predecessors, (96), 30 states have return successors, (146), 93 states have call predecessors, (146), 96 states have call successors, (146) [2022-11-16 16:27:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1119 transitions. [2022-11-16 16:27:07,417 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1119 transitions. Word has length 73 [2022-11-16 16:27:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:07,417 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 1119 transitions. [2022-11-16 16:27:07,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 16:27:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1119 transitions. [2022-11-16 16:27:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 16:27:07,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:07,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:07,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 16:27:07,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 16:27:07,634 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1186472100, now seen corresponding path program 1 times [2022-11-16 16:27:07,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:07,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995306685] [2022-11-16 16:27:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:07,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 16:27:07,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:07,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995306685] [2022-11-16 16:27:07,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995306685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:27:07,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556760111] [2022-11-16 16:27:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:07,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:07,779 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:27:07,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 16:27:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:27:08,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 16:27:08,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:08,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556760111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:08,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:27:08,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 16:27:08,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958581694] [2022-11-16 16:27:08,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:08,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:08,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:08,070 INFO L87 Difference]: Start difference. First operand 708 states and 1119 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2022-11-16 16:27:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:08,300 INFO L93 Difference]: Finished difference Result 2096 states and 3412 transitions. [2022-11-16 16:27:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:08,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 115 [2022-11-16 16:27:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:08,309 INFO L225 Difference]: With dead ends: 2096 [2022-11-16 16:27:08,309 INFO L226 Difference]: Without dead ends: 1394 [2022-11-16 16:27:08,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:08,315 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 205 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:08,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 389 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-11-16 16:27:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1387. [2022-11-16 16:27:08,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1143 states have (on average 1.504811898512686) internal successors, (1720), 1150 states have internal predecessors, (1720), 183 states have call successors, (183), 60 states have call predecessors, (183), 60 states have return successors, (279), 177 states have call predecessors, (279), 183 states have call successors, (279) [2022-11-16 16:27:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2182 transitions. [2022-11-16 16:27:08,474 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2182 transitions. Word has length 115 [2022-11-16 16:27:08,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:08,474 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 2182 transitions. [2022-11-16 16:27:08,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2022-11-16 16:27:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2182 transitions. [2022-11-16 16:27:08,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 16:27:08,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:08,479 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:08,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:08,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 16:27:08,686 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash -834046554, now seen corresponding path program 1 times [2022-11-16 16:27:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:08,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026948076] [2022-11-16 16:27:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 16:27:08,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:08,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026948076] [2022-11-16 16:27:08,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026948076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:27:08,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508205089] [2022-11-16 16:27:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:08,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:08,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:08,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:27:08,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 16:27:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:27:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 16:27:09,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:09,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508205089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:09,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:27:09,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 16:27:09,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241364995] [2022-11-16 16:27:09,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:09,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:09,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:09,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:09,192 INFO L87 Difference]: Start difference. First operand 1387 states and 2182 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2022-11-16 16:27:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:09,547 INFO L93 Difference]: Finished difference Result 4118 states and 6666 transitions. [2022-11-16 16:27:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:09,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 115 [2022-11-16 16:27:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:09,572 INFO L225 Difference]: With dead ends: 4118 [2022-11-16 16:27:09,573 INFO L226 Difference]: Without dead ends: 2737 [2022-11-16 16:27:09,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:09,581 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 199 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:09,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 389 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2022-11-16 16:27:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2725. [2022-11-16 16:27:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2252 states have (on average 1.4991119005328597) internal successors, (3376), 2265 states have internal predecessors, (3376), 352 states have call successors, (352), 120 states have call predecessors, (352), 120 states have return successors, (536), 340 states have call predecessors, (536), 352 states have call successors, (536) [2022-11-16 16:27:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 4264 transitions. [2022-11-16 16:27:09,873 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 4264 transitions. Word has length 115 [2022-11-16 16:27:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:09,874 INFO L495 AbstractCegarLoop]: Abstraction has 2725 states and 4264 transitions. [2022-11-16 16:27:09,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2022-11-16 16:27:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 4264 transitions. [2022-11-16 16:27:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 16:27:09,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:09,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:09,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:10,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:10,086 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1589064744, now seen corresponding path program 1 times [2022-11-16 16:27:10,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:10,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271986172] [2022-11-16 16:27:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:10,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 16:27:10,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:10,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271986172] [2022-11-16 16:27:10,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271986172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:27:10,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669668320] [2022-11-16 16:27:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:10,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:10,227 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:27:10,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 16:27:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:27:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 16:27:10,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:10,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669668320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:10,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:27:10,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 16:27:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420838881] [2022-11-16 16:27:10,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:10,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:10,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:10,534 INFO L87 Difference]: Start difference. First operand 2725 states and 4264 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2022-11-16 16:27:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:11,096 INFO L93 Difference]: Finished difference Result 8102 states and 13033 transitions. [2022-11-16 16:27:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 115 [2022-11-16 16:27:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:11,127 INFO L225 Difference]: With dead ends: 8102 [2022-11-16 16:27:11,128 INFO L226 Difference]: Without dead ends: 5383 [2022-11-16 16:27:11,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:11,141 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 196 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:11,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 389 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5383 states. [2022-11-16 16:27:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5383 to 5361. [2022-11-16 16:27:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5361 states, 4440 states have (on average 1.4927927927927929) internal successors, (6628), 4465 states have internal predecessors, (6628), 680 states have call successors, (680), 240 states have call predecessors, (680), 240 states have return successors, (1032), 656 states have call predecessors, (1032), 680 states have call successors, (1032) [2022-11-16 16:27:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5361 states to 5361 states and 8340 transitions. [2022-11-16 16:27:11,659 INFO L78 Accepts]: Start accepts. Automaton has 5361 states and 8340 transitions. Word has length 115 [2022-11-16 16:27:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:11,660 INFO L495 AbstractCegarLoop]: Abstraction has 5361 states and 8340 transitions. [2022-11-16 16:27:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2022-11-16 16:27:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 5361 states and 8340 transitions. [2022-11-16 16:27:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 16:27:11,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:11,669 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:11,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:11,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 16:27:11,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:11,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1260661530, now seen corresponding path program 1 times [2022-11-16 16:27:11,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:11,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611018023] [2022-11-16 16:27:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:11,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 16:27:12,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611018023] [2022-11-16 16:27:12,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611018023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:27:12,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614731336] [2022-11-16 16:27:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:12,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:12,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:27:12,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 16:27:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:27:12,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:27:12,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:12,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614731336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:12,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:27:12,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 16:27:12,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629838350] [2022-11-16 16:27:12,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:12,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:12,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:12,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:12,488 INFO L87 Difference]: Start difference. First operand 5361 states and 8340 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) [2022-11-16 16:27:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:13,624 INFO L93 Difference]: Finished difference Result 15950 states and 25485 transitions. [2022-11-16 16:27:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:13,625 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 115 [2022-11-16 16:27:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:13,732 INFO L225 Difference]: With dead ends: 15950 [2022-11-16 16:27:13,733 INFO L226 Difference]: Without dead ends: 10595 [2022-11-16 16:27:13,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:13,763 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 190 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:13,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 389 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10595 states. [2022-11-16 16:27:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10595 to 10553. [2022-11-16 16:27:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10553 states, 8756 states have (on average 1.4860666971219736) internal successors, (13012), 8805 states have internal predecessors, (13012), 1316 states have call successors, (1316), 480 states have call predecessors, (1316), 480 states have return successors, (1988), 1268 states have call predecessors, (1988), 1316 states have call successors, (1988) [2022-11-16 16:27:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10553 states to 10553 states and 16316 transitions. [2022-11-16 16:27:14,874 INFO L78 Accepts]: Start accepts. Automaton has 10553 states and 16316 transitions. Word has length 115 [2022-11-16 16:27:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:14,875 INFO L495 AbstractCegarLoop]: Abstraction has 10553 states and 16316 transitions. [2022-11-16 16:27:14,876 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) [2022-11-16 16:27:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10553 states and 16316 transitions. [2022-11-16 16:27:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 16:27:14,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:14,894 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:14,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:15,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95608fc0-6865-4e70-b627-e148df07e4ac/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 16:27:15,101 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash 675240996, now seen corresponding path program 1 times [2022-11-16 16:27:15,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:15,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104211490] [2022-11-16 16:27:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:15,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 16:27:15,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:15,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104211490] [2022-11-16 16:27:15,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104211490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:15,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:15,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318101613] [2022-11-16 16:27:15,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:15,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:15,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:15,294 INFO L87 Difference]: Start difference. First operand 10553 states and 16316 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 16:27:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:16,449 INFO L93 Difference]: Finished difference Result 21403 states and 33901 transitions. [2022-11-16 16:27:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:16,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2022-11-16 16:27:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:16,541 INFO L225 Difference]: With dead ends: 21403 [2022-11-16 16:27:16,541 INFO L226 Difference]: Without dead ends: 12953 [2022-11-16 16:27:16,579 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 [2022-11-16 16:27:16,580 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 101 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:16,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 495 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:16,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12953 states. [2022-11-16 16:27:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12953 to 12137. [2022-11-16 16:27:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12137 states, 10276 states have (on average 1.5231607629427792) internal successors, (15652), 10325 states have internal predecessors, (15652), 1348 states have call successors, (1348), 512 states have call predecessors, (1348), 512 states have return successors, (2020), 1300 states have call predecessors, (2020), 1348 states have call successors, (2020) [2022-11-16 16:27:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12137 states to 12137 states and 19020 transitions. [2022-11-16 16:27:17,901 INFO L78 Accepts]: Start accepts. Automaton has 12137 states and 19020 transitions. Word has length 115 [2022-11-16 16:27:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:17,902 INFO L495 AbstractCegarLoop]: Abstraction has 12137 states and 19020 transitions. [2022-11-16 16:27:17,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 16:27:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 12137 states and 19020 transitions. [2022-11-16 16:27:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 16:27:17,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:17,938 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:17,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 16:27:17,938 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash 204677628, now seen corresponding path program 1 times [2022-11-16 16:27:17,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:17,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942222878] [2022-11-16 16:27:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-16 16:27:18,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:18,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942222878] [2022-11-16 16:27:18,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942222878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:18,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:18,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:18,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244280170] [2022-11-16 16:27:18,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:18,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:18,081 INFO L87 Difference]: Start difference. First operand 12137 states and 19020 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:27:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:20,356 INFO L93 Difference]: Finished difference Result 36046 states and 57713 transitions. [2022-11-16 16:27:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:20,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-11-16 16:27:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:20,475 INFO L225 Difference]: With dead ends: 36046 [2022-11-16 16:27:20,475 INFO L226 Difference]: Without dead ends: 23915 [2022-11-16 16:27:20,518 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 [2022-11-16 16:27:20,520 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 194 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:20,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 391 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23915 states. [2022-11-16 16:27:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23915 to 23801. [2022-11-16 16:27:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23801 states, 20164 states have (on average 1.5141836937115651) internal successors, (30532), 20261 states have internal predecessors, (30532), 2612 states have call successors, (2612), 1024 states have call predecessors, (2612), 1024 states have return successors, (3892), 2516 states have call predecessors, (3892), 2612 states have call successors, (3892) [2022-11-16 16:27:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23801 states to 23801 states and 37036 transitions. [2022-11-16 16:27:22,716 INFO L78 Accepts]: Start accepts. Automaton has 23801 states and 37036 transitions. Word has length 156 [2022-11-16 16:27:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:22,717 INFO L495 AbstractCegarLoop]: Abstraction has 23801 states and 37036 transitions. [2022-11-16 16:27:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:27:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 23801 states and 37036 transitions. [2022-11-16 16:27:22,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 16:27:22,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:22,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:22,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 16:27:22,789 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash 236906176, now seen corresponding path program 1 times [2022-11-16 16:27:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:22,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459357963] [2022-11-16 16:27:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:22,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-16 16:27:22,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:22,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459357963] [2022-11-16 16:27:22,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459357963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:22,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:22,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:22,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860321125] [2022-11-16 16:27:22,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:22,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:22,912 INFO L87 Difference]: Start difference. First operand 23801 states and 37036 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:27:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:27,020 INFO L93 Difference]: Finished difference Result 70686 states and 112289 transitions. [2022-11-16 16:27:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:27,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-11-16 16:27:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:27,261 INFO L225 Difference]: With dead ends: 70686 [2022-11-16 16:27:27,261 INFO L226 Difference]: Without dead ends: 46891 [2022-11-16 16:27:27,334 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 [2022-11-16 16:27:27,335 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 196 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:27,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 391 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46891 states. [2022-11-16 16:27:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46891 to 46665. [2022-11-16 16:27:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46665 states, 39556 states have (on average 1.504803316816665) internal successors, (59524), 39749 states have internal predecessors, (59524), 5060 states have call successors, (5060), 2048 states have call predecessors, (5060), 2048 states have return successors, (7492), 4868 states have call predecessors, (7492), 5060 states have call successors, (7492) [2022-11-16 16:27:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46665 states to 46665 states and 72076 transitions. [2022-11-16 16:27:30,909 INFO L78 Accepts]: Start accepts. Automaton has 46665 states and 72076 transitions. Word has length 156 [2022-11-16 16:27:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:30,909 INFO L495 AbstractCegarLoop]: Abstraction has 46665 states and 72076 transitions. [2022-11-16 16:27:30,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:27:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 46665 states and 72076 transitions. [2022-11-16 16:27:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 16:27:31,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:31,278 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:31,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 16:27:31,278 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash 745394872, now seen corresponding path program 1 times [2022-11-16 16:27:31,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:31,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587029095] [2022-11-16 16:27:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:31,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-16 16:27:31,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:31,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587029095] [2022-11-16 16:27:31,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587029095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:31,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:31,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:31,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127490900] [2022-11-16 16:27:31,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:31,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:31,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:31,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:31,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:31,379 INFO L87 Difference]: Start difference. First operand 46665 states and 72076 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:27:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:37,762 INFO L93 Difference]: Finished difference Result 138574 states and 218321 transitions. [2022-11-16 16:27:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:37,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-11-16 16:27:37,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:38,241 INFO L225 Difference]: With dead ends: 138574 [2022-11-16 16:27:38,241 INFO L226 Difference]: Without dead ends: 91915 [2022-11-16 16:27:38,478 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 [2022-11-16 16:27:38,479 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 199 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:38,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 391 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91915 states.