./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/hard-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/hard-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8 --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 98c9c42af626702ddf5387966d0ee6d8ed18622c4592b3b15adb184fa40ea1b1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:37,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:37,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:37,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:37,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:37,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:37,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:37,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:37,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:37,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:37,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:37,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:37,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:37,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:37,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:37,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:37,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:37,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:37,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:37,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:37,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:37,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:37,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:37,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:37,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:37,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:37,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:37,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:37,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:37,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:37,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:37,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:37,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:37,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:37,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:37,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:37,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:37,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:37,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:37,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:37,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:37,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:21:37,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:37,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:37,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:37,679 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:37,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:37,680 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:37,680 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:21:37,680 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:37,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:37,680 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:21:37,681 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:21:37,681 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:37,681 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:21:37,681 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:21:37,681 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:21:37,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:37,682 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:21:37,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:21:37,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:21:37,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:37,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:37,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:37,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:37,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:37,684 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:21:37,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:37,684 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:37,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:37,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:37,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:37,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:37,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:37,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:37,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:37,686 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:21:37,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:21:37,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:37,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:37,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:37,696 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_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c9c42af626702ddf5387966d0ee6d8ed18622c4592b3b15adb184fa40ea1b1 [2021-11-07 02:21:38,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:38,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:38,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:38,031 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:38,032 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:38,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench/hard-u.c [2021-11-07 02:21:38,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/data/dfa861f7b/5a4959c0bc8144f3bfc1a3397291d276/FLAG93475fd8a [2021-11-07 02:21:38,614 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:38,614 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/sv-benchmarks/c/nla-digbench/hard-u.c [2021-11-07 02:21:38,624 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/data/dfa861f7b/5a4959c0bc8144f3bfc1a3397291d276/FLAG93475fd8a [2021-11-07 02:21:38,977 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/data/dfa861f7b/5a4959c0bc8144f3bfc1a3397291d276 [2021-11-07 02:21:38,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:38,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:38,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:38,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:38,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:38,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f8e18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38, skipping insertion in model container [2021-11-07 02:21:38,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:21:39,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:39,181 WARN L228 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_84f97d00-c2a9-475a-871d-ee9ec7a1418a/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2021-11-07 02:21:39,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:39,206 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:21:39,217 WARN L228 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_84f97d00-c2a9-475a-871d-ee9ec7a1418a/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2021-11-07 02:21:39,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:39,236 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:21:39,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39 WrapperNode [2021-11-07 02:21:39,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:39,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:39,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:21:39,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:21:39,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:39,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:21:39,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:21:39,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:21:39,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:21:39,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:21:39,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:21:39,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:21:39,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (1/1) ... [2021-11-07 02:21:39,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:39,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:39,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:21:39,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:21:39,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:21:39,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:21:39,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:21:39,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:21:39,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:21:39,769 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-11-07 02:21:39,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:39 BoogieIcfgContainer [2021-11-07 02:21:39,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:21:39,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:21:39,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:21:39,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:21:39,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:21:38" (1/3) ... [2021-11-07 02:21:39,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4512f2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:39, skipping insertion in model container [2021-11-07 02:21:39,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:39" (2/3) ... [2021-11-07 02:21:39,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4512f2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:39, skipping insertion in model container [2021-11-07 02:21:39,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:39" (3/3) ... [2021-11-07 02:21:39,797 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.c [2021-11-07 02:21:39,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:21:39,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-07 02:21:39,859 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:21:39,876 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 [2021-11-07 02:21:39,876 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-07 02:21:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.72) internal successors, (43), 32 states have internal predecessors, (43), 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) [2021-11-07 02:21:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 02:21:39,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:39,910 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 02:21:39,913 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:21:39,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:39,927 INFO L85 PathProgramCache]: Analyzing trace with hash 5022860, now seen corresponding path program 1 times [2021-11-07 02:21:39,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:21:39,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790893400] [2021-11-07 02:21:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:39,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:21:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:40,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:21:40,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790893400] [2021-11-07 02:21:40,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790893400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:40,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:40,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:21:40,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896424288] [2021-11-07 02:21:40,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:40,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:21:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:40,302 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.72) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-07 02:21:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:40,436 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2021-11-07 02:21:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:40,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-07 02:21:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:40,449 INFO L225 Difference]: With dead ends: 83 [2021-11-07 02:21:40,450 INFO L226 Difference]: Without dead ends: 47 [2021-11-07 02:21:40,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-07 02:21:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2021-11-07 02:21:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 28 states have internal predecessors, (30), 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) [2021-11-07 02:21:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-07 02:21:40,570 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 4 [2021-11-07 02:21:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:40,571 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-07 02:21:40,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-07 02:21:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-07 02:21:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 02:21:40,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:40,572 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 02:21:40,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:21:40,573 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:21:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:40,577 INFO L85 PathProgramCache]: Analyzing trace with hash 532156911, now seen corresponding path program 1 times [2021-11-07 02:21:40,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:21:40,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713389085] [2021-11-07 02:21:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:40,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:21:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:40,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:21:40,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713389085] [2021-11-07 02:21:40,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713389085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:40,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:40,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:21:40,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379803764] [2021-11-07 02:21:40,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:40,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:21:40,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:40,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:40,688 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-07 02:21:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:42,854 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-11-07 02:21:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:42,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 02:21:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:42,856 INFO L225 Difference]: With dead ends: 47 [2021-11-07 02:21:42,856 INFO L226 Difference]: Without dead ends: 45 [2021-11-07 02:21:42,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-07 02:21:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2021-11-07 02:21:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-11-07 02:21:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-07 02:21:42,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 6 [2021-11-07 02:21:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:42,864 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-07 02:21:42,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-07 02:21:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-07 02:21:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:21:42,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:42,865 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:42,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:21:42,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:21:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash 301839346, now seen corresponding path program 1 times [2021-11-07 02:21:42,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:21:42,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760876603] [2021-11-07 02:21:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:42,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:21:42,891 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:21:42,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802510267] [2021-11-07 02:21:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:42,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:21:42,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:42,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:21:42,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:21:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:21:42,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:43,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:43,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:21:43,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760876603] [2021-11-07 02:21:43,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:21:43,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802510267] [2021-11-07 02:21:43,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802510267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:43,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:43,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:43,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330027061] [2021-11-07 02:21:43,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:21:43,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:21:43,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:21:43,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:43,246 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:47,736 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-11-07 02:21:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:21:47,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 02:21:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:47,739 INFO L225 Difference]: With dead ends: 76 [2021-11-07 02:21:47,739 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 02:21:47,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:21:47,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 02:21:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2021-11-07 02:21:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 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) [2021-11-07 02:21:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-11-07 02:21:47,757 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 8 [2021-11-07 02:21:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:47,757 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-11-07 02:21:47,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-11-07 02:21:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:21:47,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:47,758 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:47,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:47,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:21:47,987 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:21:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:47,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1560639569, now seen corresponding path program 1 times [2021-11-07 02:21:47,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:21:47,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831116634] [2021-11-07 02:21:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:47,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:21:48,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:21:48,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899185015] [2021-11-07 02:21:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:48,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:21:48,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:48,013 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:21:48,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 02:21:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:48,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:21:48,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:48,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:48,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:21:48,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831116634] [2021-11-07 02:21:48,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:21:48,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899185015] [2021-11-07 02:21:48,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899185015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:48,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:48,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:21:48,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516922247] [2021-11-07 02:21:48,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:21:48,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:21:48,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:21:48,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:21:48,588 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-11-07 02:22:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:04,077 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-11-07 02:22:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:22:04,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 02:22:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:04,079 INFO L225 Difference]: With dead ends: 71 [2021-11-07 02:22:04,079 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 02:22:04,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:22:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 02:22:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2021-11-07 02:22:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 51 states have internal predecessors, (55), 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) [2021-11-07 02:22:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-11-07 02:22:04,088 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 11 [2021-11-07 02:22:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:04,089 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-11-07 02:22:04,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-11-07 02:22:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-11-07 02:22:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:22:04,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:04,090 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:04,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 02:22:04,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:22:04,307 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:22:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash -909546172, now seen corresponding path program 1 times [2021-11-07 02:22:04,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:22:04,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408112263] [2021-11-07 02:22:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:04,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:22:04,332 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:22:04,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068140360] [2021-11-07 02:22:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:04,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:22:04,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:22:04,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:22:04,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f97d00-c2a9-475a-871d-ee9ec7a1418a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process