./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur --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 f57f8b833105028fdf95b78a3cf338388755f00064f1be1e7a158d1da7dbd5a2 --- 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-38b53e6 [2022-11-25 23:52:21,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:52:21,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:52:21,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:52:21,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:52:21,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:52:21,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:52:21,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:52:21,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:52:21,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:52:21,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:52:21,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:52:21,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:52:21,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:52:21,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:52:21,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:52:21,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:52:21,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:52:21,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:52:21,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:52:21,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:52:21,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:52:21,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:52:21,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:52:21,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:52:21,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:52:21,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:52:21,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:52:21,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:52:21,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:52:21,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:52:21,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:52:21,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:52:21,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:52:21,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:52:21,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:52:21,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:52:21,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:52:21,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:52:21,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:52:21,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:52:21,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:52:21,221 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:52:21,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:52:21,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:52:21,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:52:21,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:52:21,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:52:21,224 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:52:21,224 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:52:21,225 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:52:21,225 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:52:21,226 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:52:21,226 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:52:21,227 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:52:21,227 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:52:21,227 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:52:21,227 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:52:21,228 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:52:21,228 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:52:21,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:52:21,230 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:52:21,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:52:21,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:52:21,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:52:21,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:52:21,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:52:21,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:52:21,232 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:52:21,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:52:21,232 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:52:21,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:52:21,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:52:21,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:52:21,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:52:21,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:52:21,235 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:52:21,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:52:21,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:52:21,236 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:52:21,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:52:21,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:52:21,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:52:21,237 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_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57f8b833105028fdf95b78a3cf338388755f00064f1be1e7a158d1da7dbd5a2 [2022-11-25 23:52:21,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:52:21,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:52:21,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:52:21,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:52:21,551 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:52:21,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2022-11-25 23:52:24,679 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:52:24,914 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:52:24,914 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2022-11-25 23:52:24,921 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/data/111a12ecb/eb1d30e1c1354624a8c4b05c951eff86/FLAG88042cfa3 [2022-11-25 23:52:25,247 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/data/111a12ecb/eb1d30e1c1354624a8c4b05c951eff86 [2022-11-25 23:52:25,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:52:25,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:52:25,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:52:25,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:52:25,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:52:25,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62238bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25, skipping insertion in model container [2022-11-25 23:52:25,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:52:25,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:52:25,475 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2022-11-25 23:52:25,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:52:25,496 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:52:25,534 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2022-11-25 23:52:25,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:52:25,561 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:52:25,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25 WrapperNode [2022-11-25 23:52:25,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:52:25,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:52:25,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:52:25,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:52:25,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,610 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 115 [2022-11-25 23:52:25,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:52:25,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:52:25,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:52:25,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:52:25,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:52:25,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:52:25,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:52:25,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:52:25,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (1/1) ... [2022-11-25 23:52:25,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:52:25,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:25,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:52:25,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:52:25,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:52:25,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:52:25,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:52:25,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:52:25,838 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:52:25,840 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:52:26,027 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:52:26,045 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:52:26,045 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 23:52:26,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:52:26 BoogieIcfgContainer [2022-11-25 23:52:26,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:52:26,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:52:26,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:52:26,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:52:26,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:52:25" (1/3) ... [2022-11-25 23:52:26,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc93398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:52:26, skipping insertion in model container [2022-11-25 23:52:26,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:25" (2/3) ... [2022-11-25 23:52:26,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc93398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:52:26, skipping insertion in model container [2022-11-25 23:52:26,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:52:26" (3/3) ... [2022-11-25 23:52:26,058 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2022-11-25 23:52:26,077 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:52:26,078 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:52:26,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:52:26,129 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;@25bf51a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:52:26,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:52:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:52:26,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:26,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:26,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash 532985016, now seen corresponding path program 1 times [2022-11-25 23:52:26,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:26,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18979870] [2022-11-25 23:52:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:26,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:26,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:26,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18979870] [2022-11-25 23:52:26,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18979870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:26,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:26,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:52:26,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502140696] [2022-11-25 23:52:26,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:26,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:52:26,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:52:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:52:26,453 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:26,485 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2022-11-25 23:52:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:52:26,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:52:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:26,506 INFO L225 Difference]: With dead ends: 31 [2022-11-25 23:52:26,506 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 23:52:26,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:52:26,515 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:26,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 31 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:52:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 23:52:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2022-11-25 23:52:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-25 23:52:26,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 7 [2022-11-25 23:52:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:26,560 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-25 23:52:26,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-25 23:52:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:52:26,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:26,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:26,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:52:26,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1155032636, now seen corresponding path program 1 times [2022-11-25 23:52:26,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:26,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584731707] [2022-11-25 23:52:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:26,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:26,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:26,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584731707] [2022-11-25 23:52:26,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584731707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:26,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:26,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:26,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814267077] [2022-11-25 23:52:26,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:26,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:52:26,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:52:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:52:26,655 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:26,674 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-25 23:52:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:52:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:52:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:26,683 INFO L225 Difference]: With dead ends: 27 [2022-11-25 23:52:26,683 INFO L226 Difference]: Without dead ends: 13 [2022-11-25 23:52:26,684 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 [2022-11-25 23:52:26,685 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:26,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:52:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-25 23:52:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-25 23:52:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-25 23:52:26,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2022-11-25 23:52:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:26,692 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-25 23:52:26,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-25 23:52:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:52:26,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:26,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:26,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:52:26,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash -61253633, now seen corresponding path program 1 times [2022-11-25 23:52:26,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:26,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102277949] [2022-11-25 23:52:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:26,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:26,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102277949] [2022-11-25 23:52:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102277949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247040268] [2022-11-25 23:52:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:26,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:26,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:26,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:26,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:52:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:26,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:52:26,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:27,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:27,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247040268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:27,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [437511961] [2022-11-25 23:52:27,105 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:52:27,105 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:52:27,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:52:27,127 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:52:27,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:52:28,055 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:28,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [437511961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:28,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:52:28,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2022-11-25 23:52:28,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294277042] [2022-11-25 23:52:28,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:28,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:52:28,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:28,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:52:28,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:52:28,863 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:28,906 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-25 23:52:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:52:28,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:52:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:28,908 INFO L225 Difference]: With dead ends: 17 [2022-11-25 23:52:28,908 INFO L226 Difference]: Without dead ends: 13 [2022-11-25 23:52:28,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:52:28,910 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:28,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 16 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:52:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-25 23:52:28,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-25 23:52:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-25 23:52:28,921 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-11-25 23:52:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:28,921 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-25 23:52:28,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-25 23:52:28,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:52:28,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:28,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:28,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:29,130 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash -44242972, now seen corresponding path program 1 times [2022-11-25 23:52:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:29,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494621539] [2022-11-25 23:52:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:29,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:29,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:29,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494621539] [2022-11-25 23:52:29,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494621539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:29,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962823075] [2022-11-25 23:52:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:29,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:29,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:29,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:29,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:52:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:52:29,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:29,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:29,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962823075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:29,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663273282] [2022-11-25 23:52:29,316 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:52:29,316 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:52:29,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:52:29,317 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:52:29,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:52:29,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:30,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '326#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:52:30,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:52:30,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:52:30,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 23:52:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882472387] [2022-11-25 23:52:30,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:30,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:52:30,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:30,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:52:30,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:52:30,401 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:30,439 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-25 23:52:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:52:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:52:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:30,441 INFO L225 Difference]: With dead ends: 32 [2022-11-25 23:52:30,441 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 23:52:30,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:52:30,446 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:30,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:52:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 23:52:30,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-25 23:52:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-25 23:52:30,465 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 11 [2022-11-25 23:52:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:30,466 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-25 23:52:30,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-25 23:52:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 23:52:30,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:30,473 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:30,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:30,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-25 23:52:30,684 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1495002297, now seen corresponding path program 2 times [2022-11-25 23:52:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:30,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881488251] [2022-11-25 23:52:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:30,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:30,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:30,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881488251] [2022-11-25 23:52:30,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881488251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:30,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270783021] [2022-11-25 23:52:30,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:52:30,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:30,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:30,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:30,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:52:30,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 23:52:30,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:52:30,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:52:30,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:31,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:31,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270783021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:31,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184039675] [2022-11-25 23:52:31,117 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:52:31,117 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:52:31,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:52:31,119 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:52:31,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:52:31,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:32,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '558#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:52:32,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:52:32,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:52:32,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 23:52:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904898208] [2022-11-25 23:52:32,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:52:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:52:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:52:32,212 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:32,281 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-11-25 23:52:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:52:32,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-25 23:52:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:32,285 INFO L225 Difference]: With dead ends: 56 [2022-11-25 23:52:32,285 INFO L226 Difference]: Without dead ends: 49 [2022-11-25 23:52:32,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:52:32,286 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:32,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:52:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-25 23:52:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-25 23:52:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-25 23:52:32,308 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 23 [2022-11-25 23:52:32,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:32,308 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-25 23:52:32,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-25 23:52:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 23:52:32,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:32,310 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:32,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:32,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:32,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash 429682659, now seen corresponding path program 3 times [2022-11-25 23:52:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:32,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136187948] [2022-11-25 23:52:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:32,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:32,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136187948] [2022-11-25 23:52:32,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136187948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:32,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980812235] [2022-11-25 23:52:32,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:52:32,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:32,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:32,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:32,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:52:33,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:52:33,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:52:33,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:52:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:33,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:33,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980812235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:33,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235441512] [2022-11-25 23:52:33,334 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:52:33,334 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:52:33,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:52:33,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:52:33,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:52:33,628 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:34,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1018#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:52:34,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:52:34,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:52:34,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 23:52:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895032091] [2022-11-25 23:52:34,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:34,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:52:34,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:52:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:52:34,328 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:34,424 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2022-11-25 23:52:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:52:34,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-25 23:52:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:34,425 INFO L225 Difference]: With dead ends: 104 [2022-11-25 23:52:34,426 INFO L226 Difference]: Without dead ends: 97 [2022-11-25 23:52:34,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:52:34,427 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:34,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:52:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-25 23:52:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-25 23:52:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-11-25 23:52:34,448 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 47 [2022-11-25 23:52:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:34,448 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-11-25 23:52:34,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-11-25 23:52:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 23:52:34,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:34,451 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:34,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:34,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:34,657 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:34,657 INFO L85 PathProgramCache]: Analyzing trace with hash -665691081, now seen corresponding path program 4 times [2022-11-25 23:52:34,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:34,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922253584] [2022-11-25 23:52:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:34,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:35,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922253584] [2022-11-25 23:52:35,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922253584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507121966] [2022-11-25 23:52:35,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:52:35,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:35,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:35,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:35,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:52:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:35,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:52:35,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:35,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:36,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507121966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:36,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801047974] [2022-11-25 23:52:36,693 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:52:36,693 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:52:36,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:52:36,694 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:52:36,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:52:37,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:37,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1934#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:52:37,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:52:37,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:52:37,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-25 23:52:37,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056524294] [2022-11-25 23:52:37,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:37,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 23:52:37,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 23:52:37,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=1767, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 23:52:37,816 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:38,062 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2022-11-25 23:52:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 23:52:38,063 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-25 23:52:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:38,065 INFO L225 Difference]: With dead ends: 200 [2022-11-25 23:52:38,065 INFO L226 Difference]: Without dead ends: 193 [2022-11-25 23:52:38,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1203, Invalid=1767, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 23:52:38,067 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:38,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 142 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:52:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-25 23:52:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-25 23:52:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-11-25 23:52:38,105 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 95 [2022-11-25 23:52:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:38,105 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-11-25 23:52:38,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-11-25 23:52:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-25 23:52:38,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:38,108 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:38,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:38,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:38,315 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash 988400863, now seen corresponding path program 5 times [2022-11-25 23:52:38,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:38,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710221253] [2022-11-25 23:52:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:38,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:40,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:40,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710221253] [2022-11-25 23:52:40,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710221253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:40,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114674062] [2022-11-25 23:52:40,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:52:40,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:40,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:40,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:40,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:52:41,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-25 23:52:41,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:52:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 23:52:41,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:41,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:44,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114674062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:44,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495528403] [2022-11-25 23:52:44,919 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:52:44,919 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:52:44,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:52:44,920 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:52:44,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:52:45,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:46,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3762#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:52:46,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:52:46,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:52:46,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-25 23:52:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533104952] [2022-11-25 23:52:46,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:46,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-25 23:52:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-25 23:52:46,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4683, Invalid=5823, Unknown=0, NotChecked=0, Total=10506 [2022-11-25 23:52:46,216 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:46,731 INFO L93 Difference]: Finished difference Result 392 states and 441 transitions. [2022-11-25 23:52:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-25 23:52:46,732 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-11-25 23:52:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:46,734 INFO L225 Difference]: With dead ends: 392 [2022-11-25 23:52:46,735 INFO L226 Difference]: Without dead ends: 385 [2022-11-25 23:52:46,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 517 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4683, Invalid=5823, Unknown=0, NotChecked=0, Total=10506 [2022-11-25 23:52:46,738 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:46,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 212 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:52:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-25 23:52:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2022-11-25 23:52:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 384 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2022-11-25 23:52:46,802 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 191 [2022-11-25 23:52:46,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:46,803 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2022-11-25 23:52:46,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2022-11-25 23:52:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-11-25 23:52:46,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:46,809 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:46,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:47,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:52:47,017 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:47,018 INFO L85 PathProgramCache]: Analyzing trace with hash 394726959, now seen corresponding path program 6 times [2022-11-25 23:52:47,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:47,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177941789] [2022-11-25 23:52:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:47,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:55,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177941789] [2022-11-25 23:52:55,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177941789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181212174] [2022-11-25 23:52:55,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:52:55,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:55,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:55,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:55,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:52:56,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:52:56,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:52:56,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 3268 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-25 23:52:56,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:56,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:08,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181212174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:08,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885732117] [2022-11-25 23:53:08,076 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:53:08,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:53:08,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:53:08,076 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:53:08,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:53:08,407 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:53:09,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7414#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:53:09,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:53:09,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:53:09,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-25 23:53:09,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530056162] [2022-11-25 23:53:09,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:09,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-25 23:53:09,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:53:09,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-25 23:53:09,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18555, Invalid=20847, Unknown=0, NotChecked=0, Total=39402 [2022-11-25 23:53:09,703 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand has 193 states, 193 states have (on average 3.9689119170984455) internal successors, (766), 192 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:11,302 INFO L93 Difference]: Finished difference Result 776 states and 873 transitions. [2022-11-25 23:53:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-25 23:53:11,303 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 3.9689119170984455) internal successors, (766), 192 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2022-11-25 23:53:11,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:11,308 INFO L225 Difference]: With dead ends: 776 [2022-11-25 23:53:11,308 INFO L226 Difference]: Without dead ends: 769 [2022-11-25 23:53:11,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1045 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=18555, Invalid=20847, Unknown=0, NotChecked=0, Total=39402 [2022-11-25 23:53:11,312 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:11,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 425 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:53:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-11-25 23:53:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2022-11-25 23:53:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 1.0026041666666667) internal successors, (770), 768 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 770 transitions. [2022-11-25 23:53:11,407 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 770 transitions. Word has length 383 [2022-11-25 23:53:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:11,408 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 770 transitions. [2022-11-25 23:53:11,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 3.9689119170984455) internal successors, (766), 192 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 770 transitions. [2022-11-25 23:53:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2022-11-25 23:53:11,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:11,431 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:53:11,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:11,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 23:53:11,645 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:53:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1148915919, now seen corresponding path program 7 times [2022-11-25 23:53:11,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:53:11,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653062462] [2022-11-25 23:53:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:53:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:41,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:53:41,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653062462] [2022-11-25 23:53:41,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653062462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:53:41,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927990789] [2022-11-25 23:53:41,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:53:41,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:41,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:41,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:41,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:53:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:42,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 6532 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-25 23:53:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:43,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:27,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927990789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:27,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138479461] [2022-11-25 23:54:27,660 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:54:27,660 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:54:27,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:54:27,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:54:27,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:54:27,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:54:29,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14714#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:54:29,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:54:29,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:54:29,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-11-25 23:54:29,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380109177] [2022-11-25 23:54:29,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:29,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-25 23:54:29,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-25 23:54:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73947, Invalid=78543, Unknown=0, NotChecked=0, Total=152490 [2022-11-25 23:54:29,933 INFO L87 Difference]: Start difference. First operand 769 states and 770 transitions. Second operand has 385 states, 385 states have (on average 3.9844155844155846) internal successors, (1534), 384 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:36,900 INFO L93 Difference]: Finished difference Result 1544 states and 1737 transitions. [2022-11-25 23:54:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-25 23:54:36,901 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 3.9844155844155846) internal successors, (1534), 384 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 767 [2022-11-25 23:54:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:36,908 INFO L225 Difference]: With dead ends: 1544 [2022-11-25 23:54:36,908 INFO L226 Difference]: Without dead ends: 1537 [2022-11-25 23:54:36,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2491 GetRequests, 2101 SyntacticMatches, 1 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4782 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=73947, Invalid=78543, Unknown=0, NotChecked=0, Total=152490 [2022-11-25 23:54:36,916 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:36,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 816 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:54:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-11-25 23:54:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1537. [2022-11-25 23:54:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.0013020833333333) internal successors, (1538), 1536 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1538 transitions. [2022-11-25 23:54:37,080 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1538 transitions. Word has length 767 [2022-11-25 23:54:37,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:37,082 INFO L495 AbstractCegarLoop]: Abstraction has 1537 states and 1538 transitions. [2022-11-25 23:54:37,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 3.9844155844155846) internal successors, (1534), 384 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1538 transitions. [2022-11-25 23:54:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1536 [2022-11-25 23:54:37,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:37,139 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 382, 382, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:37,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:37,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:54:37,340 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:37,340 INFO L85 PathProgramCache]: Analyzing trace with hash 491329039, now seen corresponding path program 8 times [2022-11-25 23:54:37,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:37,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519330615] [2022-11-25 23:54:37,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:37,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:04,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:04,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519330615] [2022-11-25 23:57:04,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519330615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:04,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505504597] [2022-11-25 23:57:04,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:57:04,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:04,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:04,563 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:04,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:57:14,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2022-11-25 23:57:14,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:14,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 13060 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-25 23:57:14,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:16,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:17,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505504597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:00:17,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166710996] [2022-11-26 00:00:17,407 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:00:17,407 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:00:17,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:00:17,408 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:00:17,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:00:17,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:00:21,272 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29310#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_9~0#1|) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:00:21,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:00:21,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:00:21,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2022-11-26 00:00:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744127408] [2022-11-26 00:00:21,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:00:21,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-11-26 00:00:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:00:21,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-11-26 00:00:21,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295323, Invalid=304527, Unknown=0, NotChecked=0, Total=599850 [2022-11-26 00:00:21,375 INFO L87 Difference]: Start difference. First operand 1537 states and 1538 transitions. Second operand has 769 states, 769 states have (on average 3.9921976592977892) internal successors, (3070), 768 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:11,588 INFO L93 Difference]: Finished difference Result 3080 states and 3465 transitions. [2022-11-26 00:01:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-26 00:01:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 3.9921976592977892) internal successors, (3070), 768 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1535 [2022-11-26 00:01:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:11,602 INFO L225 Difference]: With dead ends: 3080 [2022-11-26 00:01:11,603 INFO L226 Difference]: Without dead ends: 3073 [2022-11-26 00:01:11,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4987 GetRequests, 4213 SyntacticMatches, 1 SemanticMatches, 773 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9582 ImplicationChecksByTransitivity, 239.5s TimeCoverageRelationStatistics Valid=295323, Invalid=304527, Unknown=0, NotChecked=0, Total=599850 [2022-11-26 00:01:11,640 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:11,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1591 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:01:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2022-11-26 00:01:12,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 3073. [2022-11-26 00:01:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3073 states, 3072 states have (on average 1.0006510416666667) internal successors, (3074), 3072 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 3074 transitions. [2022-11-26 00:01:12,046 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 3074 transitions. Word has length 1535 [2022-11-26 00:01:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:12,049 INFO L495 AbstractCegarLoop]: Abstraction has 3073 states and 3074 transitions. [2022-11-26 00:01:12,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 3.9921976592977892) internal successors, (3070), 768 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:01:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 3074 transitions. [2022-11-26 00:01:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3072 [2022-11-26 00:01:12,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:12,111 INFO L195 NwaCegarLoop]: trace histogram [766, 766, 766, 766, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:12,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:01:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893107c5-5320-4935-9668-3d29e48cac35/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:12,312 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1249714319, now seen corresponding path program 9 times [2022-11-26 00:01:12,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:12,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225131133] [2022-11-26 00:01:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:12,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat