./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d5fb336862157190b75f459fa5ac35efb8ca70e207f909b082fde37cf98e7f7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:41:26,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:41:26,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:41:26,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:41:26,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:41:26,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:41:26,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:41:26,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:41:26,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:41:26,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:41:26,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:41:26,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:41:26,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:41:26,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:41:26,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:41:26,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:41:26,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:41:26,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:41:26,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:41:26,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:41:26,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:41:26,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:41:26,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:41:26,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:41:26,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:41:26,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:41:26,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:41:26,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:41:26,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:41:26,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:41:26,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:41:26,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:41:26,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:41:26,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:41:26,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:41:26,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:41:26,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:41:26,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:41:26,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:41:26,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:41:26,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:41:26,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:41:26,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:41:26,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:41:26,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:41:26,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:41:26,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:41:26,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:41:26,336 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:41:26,336 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:41:26,337 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:41:26,337 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:41:26,338 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:41:26,339 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:41:26,339 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:41:26,339 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:41:26,339 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:41:26,340 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:41:26,340 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:41:26,340 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:41:26,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:41:26,341 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:41:26,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:41:26,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:41:26,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:41:26,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:41:26,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:41:26,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:41:26,345 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:41:26,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:41:26,346 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:41:26,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:41:26,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:41:26,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:41:26,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:41:26,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:41:26,348 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:41:26,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:41:26,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:41:26,349 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:41:26,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:41:26,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:41:26,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:41:26,350 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_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d5fb336862157190b75f459fa5ac35efb8ca70e207f909b082fde37cf98e7f7 [2022-11-16 19:41:26,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:41:26,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:41:26,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:41:26,727 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:41:26,729 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:41:26,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c [2022-11-16 19:41:26,823 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/data/0d3a39a6b/0968fca8be674321ab1962797df4c680/FLAG90af14ea0 [2022-11-16 19:41:27,377 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:41:27,378 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c [2022-11-16 19:41:27,387 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/data/0d3a39a6b/0968fca8be674321ab1962797df4c680/FLAG90af14ea0 [2022-11-16 19:41:27,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/data/0d3a39a6b/0968fca8be674321ab1962797df4c680 [2022-11-16 19:41:27,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:41:27,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:41:27,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:41:27,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:41:27,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:41:27,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:41:27" (1/1) ... [2022-11-16 19:41:27,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f3c80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:27, skipping insertion in model container [2022-11-16 19:41:27,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:41:27" (1/1) ... [2022-11-16 19:41:27,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:41:27,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:41:27,932 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2022-11-16 19:41:27,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:41:27,973 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:41:28,003 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2022-11-16 19:41:28,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:41:28,031 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:41:28,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28 WrapperNode [2022-11-16 19:41:28,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:41:28,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:41:28,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:41:28,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:41:28,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,090 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-16 19:41:28,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:41:28,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:41:28,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:41:28,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:41:28,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,116 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:41:28,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:41:28,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:41:28,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:41:28,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (1/1) ... [2022-11-16 19:41:28,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:41:28,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:28,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:41:28,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:41:28,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:41:28,214 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 19:41:28,214 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 19:41:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:41:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:41:28,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:41:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 19:41:28,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 19:41:28,287 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:41:28,289 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:41:28,506 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:41:28,557 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:41:28,557 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 19:41:28,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:41:28 BoogieIcfgContainer [2022-11-16 19:41:28,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:41:28,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:41:28,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:41:28,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:41:28,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:41:27" (1/3) ... [2022-11-16 19:41:28,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4646cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:41:28, skipping insertion in model container [2022-11-16 19:41:28,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:41:28" (2/3) ... [2022-11-16 19:41:28,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4646cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:41:28, skipping insertion in model container [2022-11-16 19:41:28,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:41:28" (3/3) ... [2022-11-16 19:41:28,572 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.c [2022-11-16 19:41:28,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:41:28,611 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:41:28,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:41:28,714 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;@70368641, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:41:28,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:41:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 19:41:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 19:41:28,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:28,732 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:28,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:28,749 INFO L85 PathProgramCache]: Analyzing trace with hash 763440750, now seen corresponding path program 1 times [2022-11-16 19:41:28,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:28,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7893300] [2022-11-16 19:41:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:28,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:41:29,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:29,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7893300] [2022-11-16 19:41:29,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7893300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:41:29,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:41:29,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:41:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261093546] [2022-11-16 19:41:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:41:29,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:41:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:41:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:41:29,501 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 19:41:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:29,764 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2022-11-16 19:41:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:41:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-16 19:41:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:29,778 INFO L225 Difference]: With dead ends: 58 [2022-11-16 19:41:29,780 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 19:41:29,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:41:29,797 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:29,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 108 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:41:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 19:41:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-11-16 19:41:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 19:41:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-11-16 19:41:29,860 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2022-11-16 19:41:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:29,861 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-11-16 19:41:29,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 19:41:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-11-16 19:41:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 19:41:29,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:29,864 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:29,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:41:29,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1804559349, now seen corresponding path program 1 times [2022-11-16 19:41:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:29,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443744477] [2022-11-16 19:41:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:41:30,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443744477] [2022-11-16 19:41:30,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443744477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:41:30,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:41:30,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:41:30,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320800969] [2022-11-16 19:41:30,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:41:30,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:41:30,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:30,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:41:30,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:41:30,044 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:41:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:30,141 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-16 19:41:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:41:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2022-11-16 19:41:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:30,144 INFO L225 Difference]: With dead ends: 41 [2022-11-16 19:41:30,144 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 19:41:30,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:41:30,147 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:30,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 100 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:41:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 19:41:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-16 19:41:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 19:41:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-16 19:41:30,188 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-11-16 19:41:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:30,190 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-16 19:41:30,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:41:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-16 19:41:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 19:41:30,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:30,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:30,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:41:30,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash 496345742, now seen corresponding path program 1 times [2022-11-16 19:41:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:30,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988708665] [2022-11-16 19:41:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:30,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:30,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:30,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964326817] [2022-11-16 19:41:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:30,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:30,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:30,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:30,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:41:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:30,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 19:41:30,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:41:30,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:41:30,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:30,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988708665] [2022-11-16 19:41:30,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:41:30,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964326817] [2022-11-16 19:41:30,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964326817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:30,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271710157] [2022-11-16 19:41:30,798 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-16 19:41:30,798 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:30,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:30,810 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:30,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:31,542 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-16 19:41:31,561 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 19:41:31,563 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:32,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1271710157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:41:32,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:32,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 7] total 21 [2022-11-16 19:41:32,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906731862] [2022-11-16 19:41:32,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:41:32,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 19:41:32,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 19:41:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:41:32,574 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 11 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 19:41:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:33,147 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-11-16 19:41:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:41:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 27 [2022-11-16 19:41:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:33,155 INFO L225 Difference]: With dead ends: 68 [2022-11-16 19:41:33,155 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 19:41:33,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:41:33,162 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:33,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 39 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:41:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 19:41:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-16 19:41:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 19:41:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-11-16 19:41:33,215 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 27 [2022-11-16 19:41:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:33,215 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-11-16 19:41:33,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 19:41:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-11-16 19:41:33,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 19:41:33,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:33,218 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:33,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 19:41:33,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:33,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash -202147981, now seen corresponding path program 1 times [2022-11-16 19:41:33,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:33,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792102980] [2022-11-16 19:41:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:33,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:33,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:33,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636374344] [2022-11-16 19:41:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:33,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:33,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:33,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:41:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 19:41:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 19:41:33,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 19:41:34,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:34,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792102980] [2022-11-16 19:41:34,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:41:34,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636374344] [2022-11-16 19:41:34,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636374344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:34,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870733337] [2022-11-16 19:41:34,156 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-16 19:41:34,156 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:34,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:34,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:34,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:37,149 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-16 19:41:37,154 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 19:41:37,155 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:37,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '917#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:37,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:37,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:37,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2022-11-16 19:41:37,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433162427] [2022-11-16 19:41:37,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:37,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 19:41:37,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:37,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 19:41:37,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-16 19:41:37,948 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-16 19:41:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:38,433 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2022-11-16 19:41:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:41:38,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 44 [2022-11-16 19:41:38,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:38,440 INFO L225 Difference]: With dead ends: 82 [2022-11-16 19:41:38,440 INFO L226 Difference]: Without dead ends: 69 [2022-11-16 19:41:38,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:41:38,443 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:38,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 88 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:41:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-16 19:41:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-16 19:41:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 19:41:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2022-11-16 19:41:38,477 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 44 [2022-11-16 19:41:38,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:38,477 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2022-11-16 19:41:38,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-16 19:41:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2022-11-16 19:41:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 19:41:38,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:38,480 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:38,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:38,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:38,689 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:38,689 INFO L85 PathProgramCache]: Analyzing trace with hash -567180131, now seen corresponding path program 1 times [2022-11-16 19:41:38,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:38,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951815676] [2022-11-16 19:41:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:38,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:38,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:38,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773511418] [2022-11-16 19:41:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:38,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:38,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:38,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:41:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:41:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 19:41:39,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 19:41:39,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:39,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951815676] [2022-11-16 19:41:39,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:41:39,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773511418] [2022-11-16 19:41:39,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773511418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:39,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589264482] [2022-11-16 19:41:39,677 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 19:41:39,677 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:39,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:39,678 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:39,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:42,320 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-16 19:41:42,381 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 19:41:42,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:43,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1479#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:43,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:43,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:43,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2022-11-16 19:41:43,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830222776] [2022-11-16 19:41:43,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:43,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 19:41:43,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:43,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 19:41:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-11-16 19:41:43,794 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-16 19:41:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:44,285 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-11-16 19:41:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:41:44,286 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 51 [2022-11-16 19:41:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:44,287 INFO L225 Difference]: With dead ends: 85 [2022-11-16 19:41:44,287 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 19:41:44,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-16 19:41:44,289 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:44,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 124 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:41:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 19:41:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-11-16 19:41:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 19:41:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-11-16 19:41:44,326 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 51 [2022-11-16 19:41:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:44,327 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-11-16 19:41:44,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-16 19:41:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-11-16 19:41:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 19:41:44,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:44,330 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:44,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:44,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:44,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:44,547 INFO L85 PathProgramCache]: Analyzing trace with hash 166119996, now seen corresponding path program 1 times [2022-11-16 19:41:44,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:44,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732067265] [2022-11-16 19:41:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:44,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:44,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:44,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983401142] [2022-11-16 19:41:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:44,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:44,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:44,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:41:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 19:41:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 19:41:45,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:42:20,511 WARN L233 SmtUtils]: Spent 19.55s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:42:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-16 19:42:54,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732067265] [2022-11-16 19:42:54,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:42:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983401142] [2022-11-16 19:42:54,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983401142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:42:54,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535378344] [2022-11-16 19:42:54,620 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-16 19:42:54,621 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:42:54,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:42:54,622 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:42:54,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:42:57,871 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-16 19:42:57,876 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 19:42:57,878 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:01,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2134#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:43:01,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:01,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:43:01,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-11-16 19:43:01,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365400491] [2022-11-16 19:43:01,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:01,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:43:01,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:01,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:43:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-11-16 19:43:01,096 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-16 19:43:29,754 WARN L233 SmtUtils]: Spent 21.86s on a formula simplification. DAG size of input: 65 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:43:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:33,077 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2022-11-16 19:43:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 19:43:33,078 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2022-11-16 19:43:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:33,080 INFO L225 Difference]: With dead ends: 100 [2022-11-16 19:43:33,080 INFO L226 Difference]: Without dead ends: 98 [2022-11-16 19:43:33,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 19:43:33,082 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:33,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 125 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-16 19:43:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-16 19:43:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-11-16 19:43:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 19:43:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2022-11-16 19:43:33,127 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 63 [2022-11-16 19:43:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:33,128 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2022-11-16 19:43:33,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-16 19:43:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2022-11-16 19:43:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 19:43:33,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:33,130 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:33,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:33,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:33,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:43:33,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:33,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1987386298, now seen corresponding path program 1 times [2022-11-16 19:43:33,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:33,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809735460] [2022-11-16 19:43:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:33,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:33,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:43:33,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872428484] [2022-11-16 19:43:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:33,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:33,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:33,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:33,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:43:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:33,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 19:43:33,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-16 19:43:33,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:34,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809735460] [2022-11-16 19:43:34,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:43:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872428484] [2022-11-16 19:43:34,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872428484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586325289] [2022-11-16 19:43:34,476 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-16 19:43:34,476 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:34,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:34,478 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:34,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:37,626 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-16 19:43:37,630 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 19:43:37,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:38,456 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2733#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:43:38,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:38,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:43:38,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-16 19:43:38,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312947470] [2022-11-16 19:43:38,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:38,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 19:43:38,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:38,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 19:43:38,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:43:38,459 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-16 19:43:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:38,991 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-11-16 19:43:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:43:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 74 [2022-11-16 19:43:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:38,996 INFO L225 Difference]: With dead ends: 102 [2022-11-16 19:43:38,997 INFO L226 Difference]: Without dead ends: 82 [2022-11-16 19:43:38,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 19:43:38,999 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:38,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 136 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:43:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-16 19:43:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-16 19:43:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 19 states have call successors, (19), 12 states have call predecessors, (19), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 19:43:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-11-16 19:43:39,031 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 74 [2022-11-16 19:43:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:39,032 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-11-16 19:43:39,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-16 19:43:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-11-16 19:43:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-16 19:43:39,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:39,034 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:39,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:39,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:39,240 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:43:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash 152662242, now seen corresponding path program 2 times [2022-11-16 19:43:39,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:39,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403608964] [2022-11-16 19:43:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:39,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:39,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:43:39,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040471158] [2022-11-16 19:43:39,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:39,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:39,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:39,269 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:39,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:43:39,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:43:39,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 19:43:39,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-16 19:43:39,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-16 19:43:41,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:41,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403608964] [2022-11-16 19:43:41,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:43:41,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040471158] [2022-11-16 19:43:41,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040471158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:41,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537895656] [2022-11-16 19:43:41,562 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-16 19:43:41,563 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:41,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:41,563 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:41,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:43,856 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-16 19:43:43,861 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 19:43:43,862 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:45,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3548#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:43:45,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:45,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:43:45,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2022-11-16 19:43:45,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353258121] [2022-11-16 19:43:45,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:45,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 19:43:45,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 19:43:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-11-16 19:43:45,123 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-16 19:43:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:48,462 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2022-11-16 19:43:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:43:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2022-11-16 19:43:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:48,464 INFO L225 Difference]: With dead ends: 108 [2022-11-16 19:43:48,464 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 19:43:48,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 220 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 19:43:48,465 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 53 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:48,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 119 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 19:43:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 19:43:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-16 19:43:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-16 19:43:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2022-11-16 19:43:48,515 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 85 [2022-11-16 19:43:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:48,516 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2022-11-16 19:43:48,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-16 19:43:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2022-11-16 19:43:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 19:43:48,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:48,518 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:48,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 19:43:48,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 19:43:48,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:43:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash 339357760, now seen corresponding path program 3 times [2022-11-16 19:43:48,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:48,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98541343] [2022-11-16 19:43:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:48,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:48,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:43:48,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971817512] [2022-11-16 19:43:48,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:48,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:48,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:48,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:48,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28b2b92-ecdc-49d6-8604-47ca51ea7838/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:43:48,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:48,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:48,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 19:43:48,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 72 proven. 43 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-16 19:43:49,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:16,230 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:50:59,855 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 3869 DAG size of output: 3782 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)