./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7 --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 63cd3e528fa28694be9f2ecbe948122395c3f48db5408253e949dc50f2a74038 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:18:21,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:18:21,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:18:21,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:18:21,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:18:21,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:18:21,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:18:21,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:18:21,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:18:21,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:18:21,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:18:21,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:18:21,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:18:21,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:18:21,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:18:21,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:18:21,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:18:21,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:18:21,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:18:21,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:18:21,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:18:21,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:18:21,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:18:21,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:18:21,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:18:21,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:18:21,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:18:21,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:18:21,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:18:21,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:18:21,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:18:21,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:18:21,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:18:21,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:18:21,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:18:21,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:18:21,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:18:21,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:18:21,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:18:21,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:18:21,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:18:21,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:18:21,288 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:18:21,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:18:21,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:18:21,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:18:21,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:18:21,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:18:21,290 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:18:21,290 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:18:21,290 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:18:21,291 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:18:21,291 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:18:21,291 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:18:21,291 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:18:21,292 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:18:21,292 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:18:21,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:18:21,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:18:21,292 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:18:21,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:18:21,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:18:21,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:18:21,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:18:21,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:18:21,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:18:21,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:18:21,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:18:21,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:18:21,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:18:21,296 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:18:21,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:18:21,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:18:21,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:18:21,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:18:21,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:18:21,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:18:21,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:18:21,298 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:18:21,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:18:21,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:18:21,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:18:21,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:18:21,299 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63cd3e528fa28694be9f2ecbe948122395c3f48db5408253e949dc50f2a74038 [2021-11-25 18:18:21,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:18:21,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:18:21,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:18:21,647 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:18:21,648 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:18:21,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c [2021-11-25 18:18:21,734 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/data/09fcc32a0/6c5d8531cb8c4446b281b1e44d20da35/FLAG1a8a5ef5b [2021-11-25 18:18:22,362 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:18:22,364 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c [2021-11-25 18:18:22,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/data/09fcc32a0/6c5d8531cb8c4446b281b1e44d20da35/FLAG1a8a5ef5b [2021-11-25 18:18:22,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/data/09fcc32a0/6c5d8531cb8c4446b281b1e44d20da35 [2021-11-25 18:18:22,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:18:22,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:18:22,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:18:22,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:18:22,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:18:22,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:18:22" (1/1) ... [2021-11-25 18:18:22,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac7be1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:22, skipping insertion in model container [2021-11-25 18:18:22,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:18:22" (1/1) ... [2021-11-25 18:18:22,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:18:22,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:18:22,955 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c[526,539] [2021-11-25 18:18:22,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:18:23,004 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:18:23,020 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c[526,539] [2021-11-25 18:18:23,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:18:23,044 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:18:23,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23 WrapperNode [2021-11-25 18:18:23,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:18:23,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:18:23,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:18:23,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:18:23,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,087 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2021-11-25 18:18:23,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:18:23,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:18:23,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:18:23,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:18:23,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:18:23,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:18:23,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:18:23,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:18:23,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (1/1) ... [2021-11-25 18:18:23,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:18:23,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:18:23,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:18:23,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:18:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:18:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:18:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:18:23,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:18:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:18:23,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:18:23,275 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:18:23,277 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:18:23,428 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:18:23,465 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:18:23,465 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:18:23,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:18:23 BoogieIcfgContainer [2021-11-25 18:18:23,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:18:23,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:18:23,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:18:23,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:18:23,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:18:22" (1/3) ... [2021-11-25 18:18:23,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45642ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:18:23, skipping insertion in model container [2021-11-25 18:18:23,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:23" (2/3) ... [2021-11-25 18:18:23,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45642ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:18:23, skipping insertion in model container [2021-11-25 18:18:23,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:18:23" (3/3) ... [2021-11-25 18:18:23,478 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.c [2021-11-25 18:18:23,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:18:23,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:18:23,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:18:23,582 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:18:23,582 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:18:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 18:18:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:18:23,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:18:23,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:18:23,619 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:18:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:18:23,626 INFO L85 PathProgramCache]: Analyzing trace with hash -697525204, now seen corresponding path program 1 times [2021-11-25 18:18:23,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:18:23,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923718570] [2021-11-25 18:18:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:23,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:18:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:18:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:18:23,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:18:23,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923718570] [2021-11-25 18:18:23,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923718570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:18:23,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:18:23,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:18:23,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835019222] [2021-11-25 18:18:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:18:23,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:18:23,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:18:23,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:18:23,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:18:23,923 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:18:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:18:24,057 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2021-11-25 18:18:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:18:24,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:18:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:18:24,070 INFO L225 Difference]: With dead ends: 51 [2021-11-25 18:18:24,070 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 18:18:24,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:18:24,089 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:18:24,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 83 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:18:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 18:18:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-11-25 18:18:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:18:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-25 18:18:24,168 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 6 [2021-11-25 18:18:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:18:24,169 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-25 18:18:24,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:18:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-25 18:18:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:18:24,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:18:24,173 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:18:24,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:18:24,174 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:18:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:18:24,179 INFO L85 PathProgramCache]: Analyzing trace with hash -515229903, now seen corresponding path program 1 times [2021-11-25 18:18:24,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:18:24,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357339110] [2021-11-25 18:18:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:24,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:18:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:18:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:18:24,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:18:24,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357339110] [2021-11-25 18:18:24,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357339110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:18:24,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:18:24,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:18:24,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149772902] [2021-11-25 18:18:24,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:18:24,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:18:24,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:18:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:18:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:18:24,388 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:18:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:18:24,486 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-11-25 18:18:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:18:24,488 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 18:18:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:18:24,491 INFO L225 Difference]: With dead ends: 34 [2021-11-25 18:18:24,491 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 18:18:24,496 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:18:24,497 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:18:24,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:18:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 18:18:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2021-11-25 18:18:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:18:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-25 18:18:24,515 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2021-11-25 18:18:24,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:18:24,516 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-25 18:18:24,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:18:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-25 18:18:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:18:24,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:18:24,519 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:18:24,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:18:24,526 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:18:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:18:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1604661492, now seen corresponding path program 1 times [2021-11-25 18:18:24,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:18:24,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542965176] [2021-11-25 18:18:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:24,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:18:24,562 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:18:24,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93932870] [2021-11-25 18:18:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:24,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:18:24,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:18:24,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:18:24,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:18:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:18:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:18:24,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:18:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:18:24,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:18:24,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:18:24,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542965176] [2021-11-25 18:18:24,875 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:18:24,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93932870] [2021-11-25 18:18:24,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93932870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:18:24,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:18:24,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:18:24,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376459384] [2021-11-25 18:18:24,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:18:24,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:18:24,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:18:24,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:18:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:18:24,886 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:18:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:18:24,990 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2021-11-25 18:18:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:18:24,990 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-25 18:18:24,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:18:24,992 INFO L225 Difference]: With dead ends: 53 [2021-11-25 18:18:24,992 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 18:18:24,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:18:24,994 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:18:24,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 83 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:18:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 18:18:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-25 18:18:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:18:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-25 18:18:25,008 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 16 [2021-11-25 18:18:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:18:25,008 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-25 18:18:25,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:18:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-25 18:18:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:18:25,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:18:25,010 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:18:25,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:18:25,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:18:25,226 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:18:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:18:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash -462181282, now seen corresponding path program 1 times [2021-11-25 18:18:25,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:18:25,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100545992] [2021-11-25 18:18:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:25,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:18:25,239 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:18:25,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713579687] [2021-11-25 18:18:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:25,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:18:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:18:25,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:18:25,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:18:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:18:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:18:25,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:18:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:18:25,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:18:25,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:18:25,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100545992] [2021-11-25 18:18:25,463 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:18:25,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713579687] [2021-11-25 18:18:25,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713579687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:18:25,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:18:25,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:18:25,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617767470] [2021-11-25 18:18:25,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:18:25,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:18:25,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:18:25,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:18:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:18:25,467 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2021-11-25 18:18:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:18:25,542 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2021-11-25 18:18:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:18:25,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 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 23 [2021-11-25 18:18:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:18:25,547 INFO L225 Difference]: With dead ends: 52 [2021-11-25 18:18:25,547 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 18:18:25,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:18:25,553 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:18:25,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 62 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:18:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 18:18:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-11-25 18:18:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 18:18:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-11-25 18:18:25,575 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 23 [2021-11-25 18:18:25,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:18:25,576 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-11-25 18:18:25,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2021-11-25 18:18:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-11-25 18:18:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 18:18:25,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:18:25,578 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 18:18:25,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:18:25,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:18:25,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:18:25,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:18:25,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1042343919, now seen corresponding path program 1 times [2021-11-25 18:18:25,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:18:25,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357408052] [2021-11-25 18:18:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:25,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:18:25,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:18:25,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981358769] [2021-11-25 18:18:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:25,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:18:25,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:18:25,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:18:25,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:18:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:18:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:18:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:18:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:18:26,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:18:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-25 18:18:26,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:18:26,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357408052] [2021-11-25 18:18:26,230 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:18:26,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981358769] [2021-11-25 18:18:26,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981358769] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 18:18:26,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:18:26,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-25 18:18:26,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358303347] [2021-11-25 18:18:26,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:18:26,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:18:26,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:18:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:18:26,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:18:26,233 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 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) [2021-11-25 18:18:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:18:26,660 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-11-25 18:18:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:18:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 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 33 [2021-11-25 18:18:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:18:26,666 INFO L225 Difference]: With dead ends: 51 [2021-11-25 18:18:26,666 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 18:18:26,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:18:26,668 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:18:26,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:18:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 18:18:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-11-25 18:18:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 18:18:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-11-25 18:18:26,678 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 33 [2021-11-25 18:18:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:18:26,679 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-11-25 18:18:26,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 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) [2021-11-25 18:18:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-11-25 18:18:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 18:18:26,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:18:26,682 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:18:26,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 18:18:26,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:18:26,891 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:18:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:18:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1731990838, now seen corresponding path program 1 times [2021-11-25 18:18:26,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:18:26,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514392474] [2021-11-25 18:18:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:26,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:18:26,910 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:18:26,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535547476] [2021-11-25 18:18:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:18:26,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:18:26,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:18:26,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:18:26,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:18:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:18:26,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:18:26,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:18:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 18:18:27,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:18:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 18:18:31,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:18:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514392474] [2021-11-25 18:18:31,151 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:18:31,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535547476] [2021-11-25 18:18:31,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535547476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:18:31,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301231445] [2021-11-25 18:18:31,189 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:18:31,190 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:18:31,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:18:31,204 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:18:31,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:19:04,273 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-25 18:19:04,282 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:19:05,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1293#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:19:05,218 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:19:05,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:19:05,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-25 18:19:05,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358634572] [2021-11-25 18:19:05,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:19:05,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:19:05,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:19:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:19:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:19:05,221 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 18:19:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:19:09,013 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2021-11-25 18:19:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:19:09,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 52 [2021-11-25 18:19:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:19:09,015 INFO L225 Difference]: With dead ends: 102 [2021-11-25 18:19:09,015 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 18:19:09,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:19:09,017 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:19:09,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 184 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:19:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 18:19:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2021-11-25 18:19:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.12) internal successors, (56), 53 states have internal predecessors, (56), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-25 18:19:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2021-11-25 18:19:09,043 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 52 [2021-11-25 18:19:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:19:09,043 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2021-11-25 18:19:09,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 18:19:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2021-11-25 18:19:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 18:19:09,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:09,047 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:09,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:19:09,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:09,268 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:09,269 INFO L85 PathProgramCache]: Analyzing trace with hash 625517203, now seen corresponding path program 2 times [2021-11-25 18:19:09,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:19:09,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888697088] [2021-11-25 18:19:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:09,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:19:09,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:19:09,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210357064] [2021-11-25 18:19:09,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:19:09,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:09,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:09,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:19:09,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:19:09,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:19:09,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:19:09,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 18:19:09,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:19:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-25 18:19:09,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:19:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-25 18:19:11,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:19:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888697088] [2021-11-25 18:19:11,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:19:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210357064] [2021-11-25 18:19:11,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210357064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:19:11,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [936392734] [2021-11-25 18:19:11,146 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:19:11,147 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:19:11,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:19:11,148 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:19:11,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:19:39,361 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-25 18:19:39,367 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:19:40,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1920#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:19:40,037 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:19:40,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:19:40,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 18:19:40,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480138077] [2021-11-25 18:19:40,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:19:40,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:19:40,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:19:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:19:40,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:19:40,039 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 18:19:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:19:41,772 INFO L93 Difference]: Finished difference Result 112 states and 133 transitions. [2021-11-25 18:19:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:19:41,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 57 [2021-11-25 18:19:41,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:19:41,774 INFO L225 Difference]: With dead ends: 112 [2021-11-25 18:19:41,774 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 18:19:41,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:19:41,776 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 13 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:19:41,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 145 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:19:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 18:19:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-11-25 18:19:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 57 states have internal predecessors, (58), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:19:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2021-11-25 18:19:41,794 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 57 [2021-11-25 18:19:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:19:41,795 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2021-11-25 18:19:41,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 18:19:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2021-11-25 18:19:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 18:19:41,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:41,798 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:41,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:19:42,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:42,004 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1143375622, now seen corresponding path program 1 times [2021-11-25 18:19:42,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:19:42,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172763807] [2021-11-25 18:19:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:42,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:19:42,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:19:42,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66926457] [2021-11-25 18:19:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:42,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:42,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:42,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:19:42,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:19:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:42,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 18:19:42,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:19:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-25 18:19:42,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:19:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-25 18:19:42,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:19:42,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172763807] [2021-11-25 18:19:42,885 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:19:42,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66926457] [2021-11-25 18:19:42,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66926457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:19:42,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176080172] [2021-11-25 18:19:42,889 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-25 18:19:42,889 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:19:42,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:19:42,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:19:42,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:20:16,819 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2021-11-25 18:20:16,823 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:20:18,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2611#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0))' at error location [2021-11-25 18:20:18,198 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:20:18,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:20:18,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2021-11-25 18:20:18,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466394918] [2021-11-25 18:20:18,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:20:18,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:20:18,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:18,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:20:18,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-11-25 18:20:18,201 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-25 18:20:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:19,151 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2021-11-25 18:20:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:20:19,152 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 63 [2021-11-25 18:20:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:19,156 INFO L225 Difference]: With dead ends: 116 [2021-11-25 18:20:19,156 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 18:20:19,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 158 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:20:19,158 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:19,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 171 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:20:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 18:20:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2021-11-25 18:20:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:20:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-11-25 18:20:19,179 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 63 [2021-11-25 18:20:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-11-25 18:20:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-25 18:20:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-11-25 18:20:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 18:20:19,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:19,182 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:20:19,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:20:19,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:19,396 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2113244439, now seen corresponding path program 1 times [2021-11-25 18:20:19,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:19,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568229422] [2021-11-25 18:20:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:19,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:19,408 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:20:19,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490804875] [2021-11-25 18:20:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:19,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:19,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:20:19,420 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:20:19,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:20:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:19,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:20:19,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:20:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-25 18:20:19,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:20:19,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:19,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568229422] [2021-11-25 18:20:19,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:20:19,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490804875] [2021-11-25 18:20:19,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490804875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:19,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:20:19,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:20:19,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813333787] [2021-11-25 18:20:19,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:19,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:20:19,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:19,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:20:19,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:20:19,719 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-25 18:20:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:19,786 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-11-25 18:20:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:20:19,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2021-11-25 18:20:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:19,788 INFO L225 Difference]: With dead ends: 92 [2021-11-25 18:20:19,788 INFO L226 Difference]: Without dead ends: 80 [2021-11-25 18:20:19,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:20:19,789 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:19,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:20:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-25 18:20:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-25 18:20:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:20:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-25 18:20:19,806 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 73 [2021-11-25 18:20:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:19,806 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-25 18:20:19,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-25 18:20:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-25 18:20:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 18:20:19,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:19,809 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 18:20:19,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:20:20,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 18:20:20,036 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:20,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:20,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1175687132, now seen corresponding path program 3 times [2021-11-25 18:20:20,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:20,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606114989] [2021-11-25 18:20:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:20,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:20,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:20:20,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276019363] [2021-11-25 18:20:20,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:20:20,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:20,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:20:20,053 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:20:20,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:20:20,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:20:20,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:20:20,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 18:20:20,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:20:33,316 WARN L227 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 48 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:20:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 101 proven. 74 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-25 18:20:47,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:07,062 WARN L227 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 10 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 18:24:41,928 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse15 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse6 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse7 (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse9 (not (= (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|))) (.cse1 (+ .cse6 1)) (.cse4 (<= 0 |c_ULTIMATE.start_main_~d~0#1|)) (.cse13 (* .cse15 |c_ULTIMATE.start_main_~B~0#1|)) (.cse5 (and (not .cse3) (< |c_ULTIMATE.start_main_~d~0#1| 0))) (.cse0 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or .cse0 (<= 0 |c_ULTIMATE.start_main_~p~0#1|) (and (or (not (= .cse1 .cse2)) .cse3 .cse4) (or .cse5 (not (= .cse6 .cse2)))) (let ((.cse12 (+ .cse15 1))) (let ((.cse14 (+ (* (div .cse12 2) |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~B~0#1|)) (.cse8 (div .cse2 2))) (let ((.cse11 (= .cse14 .cse8)) (.cse10 (= (mod .cse12 2) 0))) (and (or (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|) (< |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 .cse8)) .cse9 .cse10 .cse11) (or (< |c_ULTIMATE.start_main_~r~0#1| .cse2) .cse9 (and (or (and (not (= (mod (* |c_ULTIMATE.start_main_~B~0#1| .cse12) 2) 0)) (< .cse2 0)) .cse10 .cse11 (< |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~B~0#1| .cse8 .cse13))) (or .cse10 (<= 0 .cse2) (= .cse14 (+ .cse8 1))))))))))) (or (let ((.cse26 (* (div .cse15 2) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse27 (+ |c_ULTIMATE.start_main_~B~0#1| .cse26)) (.cse22 (div .cse13 2))) (let ((.cse17 (= .cse27 .cse22)) (.cse20 (= .cse22 .cse26)) (.cse21 (< .cse15 0)) (.cse18 (= (mod .cse15 2) 0)) (.cse19 (<= 0 .cse15))) (and (or .cse9 (let ((.cse16 (< |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 .cse22)))) (and (or .cse16 .cse17 .cse18 .cse19) (or .cse16 .cse20 .cse21))) (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (or .cse9 (< |c_ULTIMATE.start_main_~r~0#1| .cse13) (let ((.cse24 (= (mod (* |c_ULTIMATE.start_main_~B~0#1| .cse15) 2) 0))) (and (or (let ((.cse23 (< |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 .cse22 .cse13)))) (and (or .cse23 .cse17 .cse18 .cse19) (or .cse23 .cse20 .cse21))) (and (not .cse24) (< .cse13 0))) (or (let ((.cse25 (+ .cse22 1))) (and (or .cse21 (= .cse25 .cse26)) (or (= .cse27 .cse25) .cse18 .cse19))) .cse24 (<= 0 .cse13))))))))) (and (or (not (= .cse13 .cse1)) .cse3 .cse4) (or (not (= .cse6 .cse13)) .cse5)) (and (< |c_ULTIMATE.start_main_~p~0#1| 0) (not .cse0)))))) is different from false [2021-11-25 18:24:43,931 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse15 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse6 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse7 (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse9 (not (= (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|))) (.cse1 (+ .cse6 1)) (.cse4 (<= 0 |c_ULTIMATE.start_main_~d~0#1|)) (.cse13 (* .cse15 |c_ULTIMATE.start_main_~B~0#1|)) (.cse5 (and (not .cse3) (< |c_ULTIMATE.start_main_~d~0#1| 0))) (.cse0 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or .cse0 (<= 0 |c_ULTIMATE.start_main_~p~0#1|) (and (or (not (= .cse1 .cse2)) .cse3 .cse4) (or .cse5 (not (= .cse6 .cse2)))) (let ((.cse12 (+ .cse15 1))) (let ((.cse14 (+ (* (div .cse12 2) |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~B~0#1|)) (.cse8 (div .cse2 2))) (let ((.cse11 (= .cse14 .cse8)) (.cse10 (= (mod .cse12 2) 0))) (and (or (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|) (< |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 .cse8)) .cse9 .cse10 .cse11) (or (< |c_ULTIMATE.start_main_~r~0#1| .cse2) .cse9 (and (or (and (not (= (mod (* |c_ULTIMATE.start_main_~B~0#1| .cse12) 2) 0)) (< .cse2 0)) .cse10 .cse11 (< |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~B~0#1| .cse8 .cse13))) (or .cse10 (<= 0 .cse2) (= .cse14 (+ .cse8 1))))))))))) (or (let ((.cse26 (* (div .cse15 2) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse27 (+ |c_ULTIMATE.start_main_~B~0#1| .cse26)) (.cse22 (div .cse13 2))) (let ((.cse17 (= .cse27 .cse22)) (.cse20 (= .cse22 .cse26)) (.cse21 (< .cse15 0)) (.cse18 (= (mod .cse15 2) 0)) (.cse19 (<= 0 .cse15))) (and (or .cse9 (let ((.cse16 (< |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 .cse22)))) (and (or .cse16 .cse17 .cse18 .cse19) (or .cse16 .cse20 .cse21))) (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (or .cse9 (< |c_ULTIMATE.start_main_~r~0#1| .cse13) (let ((.cse24 (= (mod (* |c_ULTIMATE.start_main_~B~0#1| .cse15) 2) 0))) (and (or (let ((.cse23 (< |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 .cse22 .cse13)))) (and (or .cse23 .cse17 .cse18 .cse19) (or .cse23 .cse20 .cse21))) (and (not .cse24) (< .cse13 0))) (or (let ((.cse25 (+ .cse22 1))) (and (or .cse21 (= .cse25 .cse26)) (or (= .cse27 .cse25) .cse18 .cse19))) .cse24 (<= 0 .cse13))))))))) (and (or (not (= .cse13 .cse1)) .cse3 .cse4) (or (not (= .cse6 .cse13)) .cse5)) (and (< |c_ULTIMATE.start_main_~p~0#1| 0) (not .cse0)))))) is different from true [2021-11-25 18:25:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 105 proven. 28 refuted. 0 times theorem prover too weak. 222 trivial. 6 not checked. [2021-11-25 18:25:59,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:25:59,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606114989] [2021-11-25 18:25:59,260 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:25:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276019363] [2021-11-25 18:25:59,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276019363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:25:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784866045] [2021-11-25 18:25:59,263 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:25:59,263 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:25:59,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:25:59,263 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:25:59,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:24,351 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-25 18:26:24,369 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:26:27,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3869#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:26:27,565 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:27,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:26:27,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-11-25 18:26:27,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764758117] [2021-11-25 18:26:27,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:27,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:26:27,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:27,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:26:27,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=852, Unknown=3, NotChecked=62, Total=1122 [2021-11-25 18:26:27,568 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 16 states have internal predecessors, (33), 16 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-25 18:26:57,078 WARN L227 SmtUtils]: Spent 28.97s on a formula simplification. DAG size of input: 131 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:26:59,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:27:11,300 WARN L227 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 77 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:27:19,043 WARN L227 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 77 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:27:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:19,219 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-11-25 18:27:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:27:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 16 states have internal predecessors, (33), 16 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) Word has length 81 [2021-11-25 18:27:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:19,222 INFO L225 Difference]: With dead ends: 96 [2021-11-25 18:27:19,222 INFO L226 Difference]: Without dead ends: 94 [2021-11-25 18:27:19,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 206 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 80.4s TimeCoverageRelationStatistics Valid=310, Invalid=1413, Unknown=3, NotChecked=80, Total=1806 [2021-11-25 18:27:19,224 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:19,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 237 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 268 Invalid, 0 Unknown, 99 Unchecked, 3.8s Time] [2021-11-25 18:27:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-25 18:27:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-11-25 18:27:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 59 states have internal predecessors, (60), 18 states have call successors, (18), 14 states have call predecessors, (18), 14 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-25 18:27:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-11-25 18:27:19,244 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 81 [2021-11-25 18:27:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:19,244 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-11-25 18:27:19,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 16 states have internal predecessors, (33), 16 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-25 18:27:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-11-25 18:27:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 18:27:19,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:19,247 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 18:27:19,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:19,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:27:19,447 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash 531585217, now seen corresponding path program 4 times [2021-11-25 18:27:19,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:19,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670801554] [2021-11-25 18:27:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:19,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:19,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:27:19,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167389794] [2021-11-25 18:27:19,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:27:19,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:19,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:19,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:19,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:27:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:19,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 18:27:19,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-25 18:27:19,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:27:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-25 18:27:29,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:29,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670801554] [2021-11-25 18:27:29,213 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:27:29,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167389794] [2021-11-25 18:27:29,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167389794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:27:29,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364858732] [2021-11-25 18:27:29,216 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:27:29,216 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:27:29,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:27:29,217 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:27:29,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:27:56,168 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-25 18:27:56,176 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:27:57,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4681#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:27:57,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:27:57,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:27:57,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-25 18:27:57,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175538691] [2021-11-25 18:27:57,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:27:57,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:27:57,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:57,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:27:57,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:27:57,966 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2021-11-25 18:28:22,329 WARN L227 SmtUtils]: Spent 23.88s on a formula simplification. DAG size of input: 127 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:24,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:28:26,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:28:31,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:28:33,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:28:35,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:28:37,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:28:39,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:28:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:41,360 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2021-11-25 18:28:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:28:41,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 86 [2021-11-25 18:28:41,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:41,362 INFO L225 Difference]: With dead ends: 133 [2021-11-25 18:28:41,363 INFO L226 Difference]: Without dead ends: 103 [2021-11-25 18:28:41,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 233 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:28:41,364 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 21 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:41,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 240 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 164 Invalid, 7 Unknown, 0 Unchecked, 15.8s Time] [2021-11-25 18:28:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-25 18:28:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-11-25 18:28:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 64 states have internal predecessors, (65), 22 states have call successors, (22), 15 states have call predecessors, (22), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:28:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2021-11-25 18:28:41,396 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 86 [2021-11-25 18:28:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:41,397 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2021-11-25 18:28:41,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2021-11-25 18:28:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2021-11-25 18:28:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 18:28:41,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:41,400 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-25 18:28:41,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:28:41,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:41,604 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1708968712, now seen corresponding path program 5 times [2021-11-25 18:28:41,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:41,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110307593] [2021-11-25 18:28:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:41,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:41,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:28:41,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087076938] [2021-11-25 18:28:41,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:28:41,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:41,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:41,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:28:41,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:28:41,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:28:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:28:41,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-25 18:28:43,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:29:39,042 WARN L227 SmtUtils]: Spent 26.82s on a formula simplification. DAG size of input: 85 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:39,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110307593] [2021-11-25 18:29:39,045 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:29:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087076938] [2021-11-25 18:29:39,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087076938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575785135] [2021-11-25 18:29:39,047 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:29:39,048 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:29:39,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:29:39,048 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:29:39,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:30:04,365 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-25 18:30:04,373 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:30:05,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5388#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:30:05,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:30:05,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:30:05,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-25 18:30:05,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931067855] [2021-11-25 18:30:05,624 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:30:05,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:30:05,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:30:05,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:30:05,626 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:30:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:05,797 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-25 18:30:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:30:05,798 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-11-25 18:30:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:05,800 INFO L225 Difference]: With dead ends: 106 [2021-11-25 18:30:05,800 INFO L226 Difference]: Without dead ends: 102 [2021-11-25 18:30:05,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 200 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:30:05,801 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:05,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 44 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-25 18:30:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-25 18:30:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 22 states have call successors, (22), 16 states have call predecessors, (22), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:30:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2021-11-25 18:30:05,827 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 110 [2021-11-25 18:30:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:05,828 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2021-11-25 18:30:05,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:30:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2021-11-25 18:30:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 18:30:05,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:05,830 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:05,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:06,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:06,036 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1053563790, now seen corresponding path program 1 times [2021-11-25 18:30:06,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:06,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941548271] [2021-11-25 18:30:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:06,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:06,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:30:06,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062027980] [2021-11-25 18:30:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:06,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:06,056 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:06,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:30:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:30:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 138 proven. 12 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-25 18:30:06,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:30:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 68 proven. 12 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-11-25 18:30:07,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:07,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941548271] [2021-11-25 18:30:07,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:30:07,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062027980] [2021-11-25 18:30:07,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062027980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:30:07,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258706762] [2021-11-25 18:30:07,122 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:30:07,123 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:30:07,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:30:07,123 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:30:07,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:30:34,219 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-25 18:30:34,231 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:30:35,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6378#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:30:35,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:30:35,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:30:35,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-11-25 18:30:35,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142244223] [2021-11-25 18:30:35,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:30:35,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:30:35,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:35,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:30:35,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:30:35,982 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-25 18:30:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:36,104 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-11-25 18:30:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:30:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 114 [2021-11-25 18:30:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:36,105 INFO L225 Difference]: With dead ends: 113 [2021-11-25 18:30:36,106 INFO L226 Difference]: Without dead ends: 103 [2021-11-25 18:30:36,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 313 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:30:36,107 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:36,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 99 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-25 18:30:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-25 18:30:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 22 states have call successors, (22), 16 states have call predecessors, (22), 15 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:30:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2021-11-25 18:30:36,127 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 114 [2021-11-25 18:30:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:36,128 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2021-11-25 18:30:36,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-25 18:30:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2021-11-25 18:30:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 18:30:36,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:36,131 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:36,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:36,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:30:36,331 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash 303777313, now seen corresponding path program 2 times [2021-11-25 18:30:36,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:36,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812611562] [2021-11-25 18:30:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:36,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:36,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:30:36,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888036136] [2021-11-25 18:30:36,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:30:36,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:36,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:36,362 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:36,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:30:36,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:30:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:30:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:30:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 101 proven. 4 refuted. 0 times theorem prover too weak. 831 trivial. 0 not checked. [2021-11-25 18:30:36,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:30:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 101 proven. 4 refuted. 0 times theorem prover too weak. 831 trivial. 0 not checked. [2021-11-25 18:30:37,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812611562] [2021-11-25 18:30:37,022 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:30:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888036136] [2021-11-25 18:30:37,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888036136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:30:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1649003615] [2021-11-25 18:30:37,024 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:30:37,024 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:30:37,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:30:37,025 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:30:37,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:31:02,304 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-25 18:31:02,312 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:31:04,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7456#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:31:04,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:31:04,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:31:04,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-11-25 18:31:04,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23558101] [2021-11-25 18:31:04,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:31:04,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:31:04,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:04,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:31:04,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:31:04,481 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-25 18:31:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:04,708 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2021-11-25 18:31:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:31:04,709 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 126 [2021-11-25 18:31:04,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:04,709 INFO L225 Difference]: With dead ends: 107 [2021-11-25 18:31:04,710 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 18:31:04,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:31:04,711 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:04,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 63 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:31:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 18:31:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 18:31:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 18:31:04,714 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 126 [2021-11-25 18:31:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:04,714 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 18:31:04,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-25 18:31:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 18:31:04,715 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 18:31:04,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:31:04,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:04,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:31:04,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 18:31:12,344 INFO L858 garLoopResultBuilder]: For program point L52-2(lines 22 61) no Hoare annotation was computed. [2021-11-25 18:31:12,344 INFO L854 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2021-11-25 18:31:12,345 INFO L854 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse6 (div |ULTIMATE.start_main_~p~0#1| 2)) (.cse2 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2 .cse3) (let ((.cse4 (div .cse6 2))) (let ((.cse5 (* .cse4 |ULTIMATE.start_main_~B~0#1|))) (and .cse0 (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 .cse4) (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 4 .cse5))))) (and (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) (= 2 |ULTIMATE.start_main_~p~0#1|) .cse1 (= (* 2 (* .cse6 |ULTIMATE.start_main_~B~0#1|)) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3))) [2021-11-25 18:31:12,345 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 18:31:12,345 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2021-11-25 18:31:12,345 INFO L854 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2021-11-25 18:31:12,346 INFO L858 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2021-11-25 18:31:12,346 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 18:31:12,346 INFO L854 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2021-11-25 18:31:12,346 INFO L858 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2021-11-25 18:31:12,346 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse0 (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse6 (div |ULTIMATE.start_main_~p~0#1| 2)) (.cse2 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2 .cse3) (let ((.cse4 (div .cse6 2))) (let ((.cse5 (* .cse4 |ULTIMATE.start_main_~B~0#1|))) (and .cse0 (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 .cse4) (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 4 .cse5))))) (and (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) (= 2 |ULTIMATE.start_main_~p~0#1|) .cse1 (= (* 2 (* .cse6 |ULTIMATE.start_main_~B~0#1|)) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3))) [2021-11-25 18:31:12,347 INFO L861 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2021-11-25 18:31:12,347 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse6 (div |ULTIMATE.start_main_~p~0#1| 2)) (.cse2 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2 .cse3) (let ((.cse4 (div .cse6 2))) (let ((.cse5 (* .cse4 |ULTIMATE.start_main_~B~0#1|))) (and .cse0 (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 .cse4) (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 4 .cse5))))) (and (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) (= 2 |ULTIMATE.start_main_~p~0#1|) .cse1 (= (* 2 (* .cse6 |ULTIMATE.start_main_~B~0#1|)) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3))) [2021-11-25 18:31:12,347 INFO L854 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse6 (div |ULTIMATE.start_main_~p~0#1| 2)) (.cse2 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2 .cse3) (let ((.cse4 (div .cse6 2))) (let ((.cse5 (* .cse4 |ULTIMATE.start_main_~B~0#1|))) (and .cse0 (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 .cse4) (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 4 .cse5))))) (and (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) (= 2 |ULTIMATE.start_main_~p~0#1|) .cse1 (= (* 2 (* .cse6 |ULTIMATE.start_main_~B~0#1|)) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3))) [2021-11-25 18:31:12,347 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-11-25 18:31:12,348 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-11-25 18:31:12,348 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-11-25 18:31:12,348 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-11-25 18:31:12,348 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-11-25 18:31:12,348 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-25 18:31:12,352 INFO L732 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:12,354 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:31:12,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:31:12 BoogieIcfgContainer [2021-11-25 18:31:12,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:31:12,371 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:31:12,371 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:31:12,372 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:31:12,372 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:18:23" (3/4) ... [2021-11-25 18:31:12,375 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 18:31:12,381 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-25 18:31:12,386 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-11-25 18:31:12,386 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-25 18:31:12,386 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 18:31:12,387 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 18:31:12,422 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:31:12,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:31:12,423 INFO L158 Benchmark]: Toolchain (without parser) took 769699.65ms. Allocated memory was 98.6MB in the beginning and 325.1MB in the end (delta: 226.5MB). Free memory was 56.2MB in the beginning and 122.8MB in the end (delta: -66.6MB). Peak memory consumption was 159.9MB. Max. memory is 16.1GB. [2021-11-25 18:31:12,423 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory is still 72.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:31:12,424 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.39ms. Allocated memory is still 98.6MB. Free memory was 56.0MB in the beginning and 72.5MB in the end (delta: -16.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:31:12,424 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.68ms. Allocated memory is still 98.6MB. Free memory was 72.5MB in the beginning and 70.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:31:12,425 INFO L158 Benchmark]: Boogie Preprocessor took 24.61ms. Allocated memory is still 98.6MB. Free memory was 70.9MB in the beginning and 69.8MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:31:12,425 INFO L158 Benchmark]: RCFGBuilder took 354.80ms. Allocated memory is still 98.6MB. Free memory was 69.8MB in the beginning and 58.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:31:12,425 INFO L158 Benchmark]: TraceAbstraction took 768900.71ms. Allocated memory was 98.6MB in the beginning and 325.1MB in the end (delta: 226.5MB). Free memory was 58.5MB in the beginning and 126.0MB in the end (delta: -67.5MB). Peak memory consumption was 193.6MB. Max. memory is 16.1GB. [2021-11-25 18:31:12,426 INFO L158 Benchmark]: Witness Printer took 51.23ms. Allocated memory is still 325.1MB. Free memory was 126.0MB in the beginning and 122.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:31:12,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory is still 72.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.39ms. Allocated memory is still 98.6MB. Free memory was 56.0MB in the beginning and 72.5MB in the end (delta: -16.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.68ms. Allocated memory is still 98.6MB. Free memory was 72.5MB in the beginning and 70.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 24.61ms. Allocated memory is still 98.6MB. Free memory was 70.9MB in the beginning and 69.8MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 354.80ms. Allocated memory is still 98.6MB. Free memory was 69.8MB in the beginning and 58.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 768900.71ms. Allocated memory was 98.6MB in the beginning and 325.1MB in the end (delta: 226.5MB). Free memory was 58.5MB in the beginning and 126.0MB in the end (delta: -67.5MB). Peak memory consumption was 193.6MB. Max. memory is 16.1GB. * Witness Printer took 51.23ms. Allocated memory is still 325.1MB. Free memory was 126.0MB in the beginning and 122.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 768.8s, OverallIterations: 14, TraceHistogramMax: 22, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 103.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 268 SdHoareTripleChecker+Valid, 22.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 208 mSDsluCounter, 1636 SdHoareTripleChecker+Invalid, 22.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 99 IncrementalHoareTripleChecker+Unchecked, 1286 mSDsCounter, 283 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1481 IncrementalHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 283 mSolverCounterUnsat, 389 mSDtfsCounter, 1481 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2170 GetRequests, 1903 SyntacticMatches, 49 SemanticMatches, 218 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 152.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=13, InterpolantAutomatonStates: 111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 46 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 75 PreInvPairs, 120 NumberOfFragments, 469 HoareAnnotationTreeSize, 75 FomulaSimplifications, 2149 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 10 FomulaSimplificationsInter, 15685 FormulaSimplificationTreeSizeReductionInter, 7.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 415.7s InterpolantComputationTime, 851 NumberOfCodeBlocks, 692 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1441 ConstructedInterpolants, 6 QuantifiedInterpolants, 20081 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1739 ConjunctsInSsa, 234 ConjunctsInUnsatCore, 22 InterpolantComputations, 6 PerfectInterpolantSequences, 6880/7119 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((p * B == d && B == d) && A == r) && r + q * d == A) && B == 1) || ((((((p * B == d && q == 0) && 1 <= p / 2 / 2) && 2 * (p / 2 / 2 * B) <= r) && r + q * d == A) && B == 1) && d == 4 * (p / 2 / 2 * B))) || (((((B <= r && 2 == p) && A == r) && 2 * (p / 2 * B) == d) && r + q * d == A) && B == 1) RESULT: Ultimate proved your program to be correct! [2021-11-25 18:31:12,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0117f185-f23b-45a5-bec9-e8222090a9d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE