./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 174cfd8cb6426614b32355f584844d4fc6265ba8fd3c3cda6c788ade64de4fc0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:48:03,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:48:03,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:48:03,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:48:03,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:48:03,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:48:03,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:48:03,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:48:03,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:48:03,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:48:03,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:48:03,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:48:03,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:48:03,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:48:03,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:48:03,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:48:03,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:48:03,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:48:03,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:48:03,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:48:03,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:48:03,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:48:03,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:48:03,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:48:03,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:48:03,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:48:03,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:48:03,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:48:03,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:48:03,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:48:03,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:48:03,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:48:03,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:48:03,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:48:03,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:48:03,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:48:03,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:48:03,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:48:03,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:48:03,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:48:03,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:48:03,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:48:03,409 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:48:03,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:48:03,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:48:03,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:48:03,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:48:03,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:48:03,412 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:48:03,413 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:48:03,413 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:48:03,413 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:48:03,414 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:48:03,414 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:48:03,415 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:48:03,415 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:48:03,415 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:48:03,415 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:48:03,415 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:48:03,416 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:48:03,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:48:03,417 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:48:03,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:48:03,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:48:03,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:48:03,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:48:03,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:48:03,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:48:03,419 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:48:03,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:48:03,419 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:48:03,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:48:03,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:48:03,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:48:03,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:48:03,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:48:03,421 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:48:03,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:48:03,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:48:03,421 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:48:03,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:48:03,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:48:03,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:48:03,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 174cfd8cb6426614b32355f584844d4fc6265ba8fd3c3cda6c788ade64de4fc0 [2022-11-25 23:48:03,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:48:03,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:48:03,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:48:03,737 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:48:03,737 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:48:03,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c [2022-11-25 23:48:06,840 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:48:07,099 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:48:07,100 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c [2022-11-25 23:48:07,113 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/data/0187a3ad7/9a77bae49e5a490489a05afe069e120e/FLAG16282cae4 [2022-11-25 23:48:07,131 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/data/0187a3ad7/9a77bae49e5a490489a05afe069e120e [2022-11-25 23:48:07,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:48:07,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:48:07,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:48:07,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:48:07,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:48:07,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ebe211e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07, skipping insertion in model container [2022-11-25 23:48:07,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:48:07,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:48:07,376 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c[526,539] [2022-11-25 23:48:07,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:48:07,409 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:48:07,438 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c[526,539] [2022-11-25 23:48:07,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:48:07,481 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:48:07,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07 WrapperNode [2022-11-25 23:48:07,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:48:07,506 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:48:07,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:48:07,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:48:07,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,557 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-25 23:48:07,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:48:07,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:48:07,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:48:07,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:48:07,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,603 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:48:07,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:48:07,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:48:07,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:48:07,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (1/1) ... [2022-11-25 23:48:07,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:48:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:07,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:48:07,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:48:07,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:48:07,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:48:07,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:48:07,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:48:07,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:48:07,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:48:07,793 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:48:07,796 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:48:07,961 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:48:08,020 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:48:08,020 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:48:08,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:48:08 BoogieIcfgContainer [2022-11-25 23:48:08,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:48:08,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:48:08,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:48:08,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:48:08,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:48:07" (1/3) ... [2022-11-25 23:48:08,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdc9d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:48:08, skipping insertion in model container [2022-11-25 23:48:08,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:07" (2/3) ... [2022-11-25 23:48:08,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdc9d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:48:08, skipping insertion in model container [2022-11-25 23:48:08,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:48:08" (3/3) ... [2022-11-25 23:48:08,034 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound10.c [2022-11-25 23:48:08,060 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:48:08,060 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:48:08,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:48:08,132 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@412a99f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:48:08,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:48:08,137 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) [2022-11-25 23:48:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:48:08,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:08,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:48:08,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:08,153 INFO L85 PathProgramCache]: Analyzing trace with hash -697525204, now seen corresponding path program 1 times [2022-11-25 23:48:08,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:08,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111893388] [2022-11-25 23:48:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:08,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:08,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:08,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111893388] [2022-11-25 23:48:08,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111893388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:08,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:08,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:48:08,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129493383] [2022-11-25 23:48:08,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:08,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:48:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:08,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:48:08,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:08,595 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) [2022-11-25 23:48:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:08,817 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2022-11-25 23:48:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:48:08,820 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 [2022-11-25 23:48:08,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:08,830 INFO L225 Difference]: With dead ends: 51 [2022-11-25 23:48:08,830 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 23:48:08,862 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:48:08,866 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:08,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 23:48:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-25 23:48:08,918 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) [2022-11-25 23:48:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-25 23:48:08,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 6 [2022-11-25 23:48:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:08,922 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-25 23:48:08,922 INFO L496 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) [2022-11-25 23:48:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-25 23:48:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:48:08,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:08,924 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:08,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:48:08,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash -515229903, now seen corresponding path program 1 times [2022-11-25 23:48:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:08,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639752900] [2022-11-25 23:48:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:08,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:09,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639752900] [2022-11-25 23:48:09,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639752900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:09,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:09,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:48:09,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61832895] [2022-11-25 23:48:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:48:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:48:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:09,071 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) [2022-11-25 23:48:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:09,177 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-11-25 23:48:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:48:09,181 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 [2022-11-25 23:48:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:09,183 INFO L225 Difference]: With dead ends: 34 [2022-11-25 23:48:09,183 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 23:48:09,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:48:09,185 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:09,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 23:48:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-11-25 23:48:09,208 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) [2022-11-25 23:48:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-25 23:48:09,209 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2022-11-25 23:48:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:09,210 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-25 23:48:09,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-25 23:48:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-25 23:48:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 23:48:09,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:09,211 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:09,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:48:09,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1604661492, now seen corresponding path program 1 times [2022-11-25 23:48:09,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:09,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371973501] [2022-11-25 23:48:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:09,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:09,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:48:09,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333946075] [2022-11-25 23:48:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:09,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:09,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:09,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:09,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:48:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:48:09,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:09,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:09,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:09,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371973501] [2022-11-25 23:48:09,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:48:09,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333946075] [2022-11-25 23:48:09,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333946075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:09,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1921870702] [2022-11-25 23:48:09,868 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:48:09,876 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:48:09,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:48:09,888 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:48:09,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:48:10,532 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2022-11-25 23:48:10,562 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:48:11,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1921870702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:11,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:48:11,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-11-25 23:48:11,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474075282] [2022-11-25 23:48:11,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:11,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:48:11,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:11,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:48:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:48:11,241 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:48:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:11,491 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-25 23:48:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:48:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 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 [2022-11-25 23:48:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:11,495 INFO L225 Difference]: With dead ends: 61 [2022-11-25 23:48:11,495 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 23:48:11,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:48:11,500 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:11,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 51 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:48:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 23:48:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-25 23:48:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 23:48:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-25 23:48:11,538 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 16 [2022-11-25 23:48:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:11,538 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-25 23:48:11,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:48:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-25 23:48:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 23:48:11,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:11,541 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 23:48:11,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:48:11,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:11,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1042343919, now seen corresponding path program 1 times [2022-11-25 23:48:11,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:11,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932345221] [2022-11-25 23:48:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:11,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:11,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:48:11,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602741456] [2022-11-25 23:48:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:11,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:11,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:11,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:11,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:48:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:48:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 23:48:12,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:48:12,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:12,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932345221] [2022-11-25 23:48:12,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:48:12,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602741456] [2022-11-25 23:48:12,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602741456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204357179] [2022-11-25 23:48:12,265 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:48:12,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:48:12,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:48:12,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:48:12,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:48:15,446 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-25 23:48:15,462 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:48:16,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:48:16,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:48:16,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:48:16,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-25 23:48:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87282423] [2022-11-25 23:48:16,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:16,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:48:16,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:16,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:48:16,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:48:16,413 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-25 23:48:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:17,073 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-11-25 23:48:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:48:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 33 [2022-11-25 23:48:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:17,077 INFO L225 Difference]: With dead ends: 77 [2022-11-25 23:48:17,077 INFO L226 Difference]: Without dead ends: 64 [2022-11-25 23:48:17,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:48:17,079 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:17,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 52 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:48:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-25 23:48:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-25 23:48:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-25 23:48:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-11-25 23:48:17,100 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 33 [2022-11-25 23:48:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:17,101 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-11-25 23:48:17,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-25 23:48:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-11-25 23:48:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:48:17,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:17,103 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:17,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:17,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:17,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480357, now seen corresponding path program 1 times [2022-11-25 23:48:17,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:17,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127851041] [2022-11-25 23:48:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:17,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:17,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:48:17,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130473176] [2022-11-25 23:48:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:17,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:17,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:17,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:17,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:48:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:17,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:48:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-25 23:48:17,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-25 23:48:17,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:17,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127851041] [2022-11-25 23:48:17,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:48:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130473176] [2022-11-25 23:48:17,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130473176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:17,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581591070] [2022-11-25 23:48:17,740 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:48:17,740 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:48:17,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:48:17,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:48:17,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:48:20,510 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-25 23:48:20,540 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:48:21,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1175#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:48:21,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:48:21,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:48:21,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-25 23:48:21,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547711534] [2022-11-25 23:48:21,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:21,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:48:21,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:21,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:48:21,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:48:21,557 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 23:48:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:21,743 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-11-25 23:48:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:48:21,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 40 [2022-11-25 23:48:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:21,745 INFO L225 Difference]: With dead ends: 73 [2022-11-25 23:48:21,745 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 23:48:21,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:48:21,746 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:21,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 23:48:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-11-25 23:48:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 23:48:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-11-25 23:48:21,768 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 40 [2022-11-25 23:48:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:21,769 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-11-25 23:48:21,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 23:48:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-11-25 23:48:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 23:48:21,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:21,774 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:21,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:21,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:21,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:21,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:21,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1731990838, now seen corresponding path program 1 times [2022-11-25 23:48:21,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:21,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433557608] [2022-11-25 23:48:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:21,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:21,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:48:21,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274159822] [2022-11-25 23:48:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:21,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:21,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:22,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:22,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:48:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:22,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 23:48:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-25 23:48:22,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-25 23:48:24,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433557608] [2022-11-25 23:48:24,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:48:24,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274159822] [2022-11-25 23:48:24,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274159822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:24,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883197135] [2022-11-25 23:48:24,654 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 23:48:24,655 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:48:24,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:48:24,655 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:48:24,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:48:28,387 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-25 23:48:28,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:48:29,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1727#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:48:29,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:48:29,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:48:29,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-25 23:48:29,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456883707] [2022-11-25 23:48:29,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:29,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:48:29,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:29,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:48:29,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:48:29,654 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 23:48:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:32,758 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-11-25 23:48:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:48:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 52 [2022-11-25 23:48:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:32,761 INFO L225 Difference]: With dead ends: 101 [2022-11-25 23:48:32,761 INFO L226 Difference]: Without dead ends: 99 [2022-11-25 23:48:32,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:48:32,763 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:32,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 72 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 23:48:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-25 23:48:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-11-25 23:48:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 60 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 23:48:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-11-25 23:48:32,821 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 52 [2022-11-25 23:48:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:32,823 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-11-25 23:48:32,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 23:48:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-11-25 23:48:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 23:48:32,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:32,825 INFO L195 NwaCegarLoop]: 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] [2022-11-25 23:48:32,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:33,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:48:33,026 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:33,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:33,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1143375622, now seen corresponding path program 1 times [2022-11-25 23:48:33,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:33,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372071656] [2022-11-25 23:48:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:33,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:33,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:48:33,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262570433] [2022-11-25 23:48:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:33,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:33,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:33,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:33,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:48:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:33,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 23:48:33,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-25 23:48:33,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-25 23:48:34,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372071656] [2022-11-25 23:48:34,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:48:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262570433] [2022-11-25 23:48:34,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262570433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:34,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184058992] [2022-11-25 23:48:34,067 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-25 23:48:34,067 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:48:34,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:48:34,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:48:34,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:48:37,173 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-25 23:48:37,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:48:38,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:48:38,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:48:38,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:48:38,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-25 23:48:38,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586356158] [2022-11-25 23:48:38,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:38,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:48:38,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:38,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:48:38,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:48:38,350 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-25 23:48:40,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:48:42,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:48:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:42,535 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2022-11-25 23:48:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:48:42,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2022-11-25 23:48:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:42,537 INFO L225 Difference]: With dead ends: 114 [2022-11-25 23:48:42,537 INFO L226 Difference]: Without dead ends: 99 [2022-11-25 23:48:42,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:48:42,539 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:42,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 347 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-25 23:48:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-25 23:48:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2022-11-25 23:48:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 23:48:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2022-11-25 23:48:42,571 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 63 [2022-11-25 23:48:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:42,572 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2022-11-25 23:48:42,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-25 23:48:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2022-11-25 23:48:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 23:48:42,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:42,574 INFO L195 NwaCegarLoop]: 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] [2022-11-25 23:48:42,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:42,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:42,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2113244439, now seen corresponding path program 1 times [2022-11-25 23:48:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:42,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631110824] [2022-11-25 23:48:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:42,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:42,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:48:42,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029319694] [2022-11-25 23:48:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:42,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:42,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:42,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:42,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:48:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:48:42,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-25 23:48:42,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:48:42,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631110824] [2022-11-25 23:48:42,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:48:42,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029319694] [2022-11-25 23:48:42,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029319694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:42,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:42,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:48:42,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104722643] [2022-11-25 23:48:42,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:42,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:48:42,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:42,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:48:42,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:42,946 INFO L87 Difference]: Start difference. First operand 85 states and 93 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) [2022-11-25 23:48:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:43,052 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-11-25 23:48:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:48:43,053 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 [2022-11-25 23:48:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:43,059 INFO L225 Difference]: With dead ends: 92 [2022-11-25 23:48:43,059 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 23:48:43,060 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:48:43,065 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:43,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 23:48:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-25 23:48:43,112 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) [2022-11-25 23:48:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-25 23:48:43,113 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 73 [2022-11-25 23:48:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:43,113 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-25 23:48:43,114 INFO L496 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) [2022-11-25 23:48:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-25 23:48:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:48:43,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:43,118 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:43,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:43,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:43,325 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:43,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1241228560, now seen corresponding path program 2 times [2022-11-25 23:48:43,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:43,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609727315] [2022-11-25 23:48:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:43,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:43,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:48:43,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110861110] [2022-11-25 23:48:43,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:48:43,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:43,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:43,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:43,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:48:43,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:48:43,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:43,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 23:48:43,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-25 23:48:43,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-11-25 23:48:45,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:45,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609727315] [2022-11-25 23:48:45,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:48:45,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110861110] [2022-11-25 23:48:45,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110861110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:45,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455620319] [2022-11-25 23:48:45,117 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 23:48:45,117 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:48:45,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:48:45,118 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:48:45,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:48:48,326 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-25 23:48:48,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:48:49,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3658#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:48:49,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:48:49,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:48:49,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-11-25 23:48:49,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290721339] [2022-11-25 23:48:49,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:48:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:48:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:48:49,451 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-25 23:48:54,988 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:48:57,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:48:59,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:49:02,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:49:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:02,536 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-11-25 23:49:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:49:02,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 74 [2022-11-25 23:49:02,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:02,538 INFO L225 Difference]: With dead ends: 112 [2022-11-25 23:49:02,538 INFO L226 Difference]: Without dead ends: 110 [2022-11-25 23:49:02,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:49:02,540 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 55 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:02,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 346 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2022-11-25 23:49:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-25 23:49:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-11-25 23:49:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 23:49:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2022-11-25 23:49:02,593 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 74 [2022-11-25 23:49:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:02,594 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2022-11-25 23:49:02,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-25 23:49:02,594 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2022-11-25 23:49:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 23:49:02,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:02,596 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-25 23:49:02,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 23:49:02,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:02,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:49:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1175687132, now seen corresponding path program 3 times [2022-11-25 23:49:02,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:02,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763191406] [2022-11-25 23:49:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:02,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:02,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:49:02,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785500050] [2022-11-25 23:49:02,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:49:02,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:02,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:49:02,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:49:02,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:49:02,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:49:02,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:49:02,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 23:49:02,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:30,394 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 48 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:49:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 102 proven. 67 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-25 23:49:40,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:40,855 WARN L233 SmtUtils]: Spent 35.02s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:53:07,414 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:53:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-25 23:53:43,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:53:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763191406] [2022-11-25 23:53:43,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:53:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785500050] [2022-11-25 23:53:43,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785500050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:43,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906504408] [2022-11-25 23:53:43,058 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 23:53:43,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:53:43,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:53:43,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:53:43,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:53:45,718 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-25 23:53:45,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:53:57,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4507#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:53:57,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:53:57,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:53:57,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-11-25 23:53:57,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234024416] [2022-11-25 23:53:57,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:57,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:53:57,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:53:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:53:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=964, Unknown=11, NotChecked=0, Total=1190 [2022-11-25 23:53:57,490 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-25 23:53:59,515 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse7 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse1 (+ .cse4 1))) (let ((.cse32 (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|)) (.cse17 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse18 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse0 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse51 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse52 (<= .cse1 |c_ULTIMATE.start_main_~r~0#1|)) (.cse53 (<= .cse4 |c_ULTIMATE.start_main_~r~0#1|)) (.cse50 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|))) (.cse31 (< |c_ULTIMATE.start_main_~p~0#1| 0))) (let ((.cse6 (not .cse31)) (.cse24 (or .cse53 .cse50)) (.cse25 (not .cse53)) (.cse26 (+ .cse4 |c_ULTIMATE.start_main_~A~0#1|)) (.cse20 (or .cse52 .cse50)) (.cse21 (not .cse52)) (.cse22 (+ .cse4 |c_ULTIMATE.start_main_~A~0#1| 1)) (.cse3 (not .cse51)) (.cse5 (and .cse51 (not .cse0))) (.cse19 (and (not .cse18) .cse31)) (.cse9 (not .cse50)) (.cse13 (* .cse17 |c_ULTIMATE.start_main_~B~0#1|)) (.cse27 (= .cse32 |c_ULTIMATE.start_main_~d~0#1|))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2)) .cse3) (or (not (= .cse4 .cse2)) .cse5)) .cse6 (let ((.cse16 (+ .cse17 1))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse16 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse8 (div .cse2 2))) (let ((.cse10 (= .cse15 .cse8)) (.cse11 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= (mod .cse16 2) 0))) (and (or (not (<= (+ .cse7 .cse8) |c_ULTIMATE.start_main_~A~0#1|)) .cse9 .cse10 .cse11 .cse12) (or (let ((.cse14 (< .cse2 0))) (and (or (not (<= (+ .cse7 .cse8 |c_ULTIMATE.start_main_~B~0#1| .cse13) |c_ULTIMATE.start_main_~A~0#1|)) .cse10 (and .cse14 (not (= (mod .cse2 2) 0)))) (or (not .cse14) (= .cse15 (+ .cse8 1))))) (not .cse11) .cse9 .cse12))))) .cse18)) (or .cse19 (let ((.cse23 (+ .cse7 |c_ULTIMATE.start_main_~r~0#1| .cse13))) (and (or .cse0 (and .cse20 (or .cse21 (= .cse22 .cse23))) .cse3) (or (and .cse24 (or .cse25 (= .cse26 .cse23))) .cse5)))) (or (not .cse27) (let ((.cse30 (div .cse32 2))) (let ((.cse28 (< (* 2 |c_ULTIMATE.start_main_~d~0#1|) (+ .cse32 .cse30 1))) (.cse29 (* |c_ULTIMATE.start_main_~B~0#1| (div (* |c_ULTIMATE.start_main_~p~0#1| 2) 4)))) (and (or .cse28 .cse6 (= (+ |c_ULTIMATE.start_main_~B~0#1| .cse29) .cse30) .cse18) (or .cse28 (= .cse30 .cse29) .cse31))))) (or .cse6 (let ((.cse33 (+ .cse7 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse13))) (and (or (and .cse24 (or .cse25 (= .cse26 .cse33))) .cse5) (or (and .cse20 (or .cse21 (= .cse22 .cse33))) .cse0 .cse3))) .cse18) (or (and (or (not (= .cse13 .cse1)) .cse0 .cse3) (or (not (= .cse4 .cse13)) .cse5)) .cse19 (let ((.cse46 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse39 (< .cse17 0)) (.cse48 (+ .cse46 |c_ULTIMATE.start_main_~B~0#1|)) (.cse40 (div .cse13 2))) (let ((.cse41 (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (.cse38 (= .cse40 .cse46)) (.cse35 (= (mod .cse17 2) 0)) (.cse34 (= .cse40 .cse48)) (.cse37 (not .cse39))) (and (or (let ((.cse36 (not (<= (+ .cse40 .cse7) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse34 .cse35 .cse36 .cse37) (or .cse38 .cse36 .cse39))) .cse41 .cse9) (or (not .cse41) .cse9 (let ((.cse44 (= (mod .cse13 2) 0)) (.cse49 (< .cse13 0))) (let ((.cse47 (+ .cse40 1)) (.cse45 (not .cse49)) (.cse42 (and .cse49 (not .cse44))) (.cse43 (not (<= (+ .cse40 .cse7 .cse13) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse42 .cse38 .cse43) (or .cse44 .cse45 (= .cse46 .cse47))) .cse39) (or .cse35 (and (or (= .cse47 .cse48) .cse45) (or .cse34 .cse42 .cse43)) .cse37)))))))))) .cse50 .cse27))))) is different from false [2022-11-25 23:54:08,338 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:54:10,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:54:28,543 WARN L233 SmtUtils]: Spent 11.60s on a formula simplification. DAG size of input: 97 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:54:30,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:54:47,984 WARN L233 SmtUtils]: Spent 13.15s on a formula simplification. DAG size of input: 86 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:54:50,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:54:57,959 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 87 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:55:00,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:19,467 WARN L233 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 125 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:55:21,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:23,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:25,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:27,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:30,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:31,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:47,280 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse17 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse7 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse37 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse19 (div (- |c_ULTIMATE.start_main_~p~0#1|) (- 2)))) (let ((.cse20 (* (div (- .cse19) (- 2)) |c_ULTIMATE.start_main_~B~0#1|)) (.cse1 (+ .cse4 1)) (.cse3 (not .cse37)) (.cse5 (and .cse37 (not .cse0))) (.cse6 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse9 (not (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|)))) (.cse13 (* .cse17 |c_ULTIMATE.start_main_~B~0#1|)) (.cse18 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2)) .cse3) (or (not (= .cse4 .cse2)) .cse5)) (not .cse6) (let ((.cse16 (+ .cse17 1))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse16 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse8 (div .cse2 2))) (let ((.cse10 (= .cse15 .cse8)) (.cse11 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= (mod .cse16 2) 0))) (and (or (not (<= (+ .cse7 .cse8) |c_ULTIMATE.start_main_~A~0#1|)) .cse9 .cse10 .cse11 .cse12) (or (let ((.cse14 (< .cse2 0))) (and (or (not (<= (+ .cse7 .cse8 |c_ULTIMATE.start_main_~B~0#1| .cse13) |c_ULTIMATE.start_main_~A~0#1|)) .cse10 (and .cse14 (not (= (mod .cse2 2) 0)))) (or (not .cse14) (= .cse15 (+ .cse8 1))))) (not .cse11) .cse9 .cse12))))) .cse18)) (= (mod .cse19 2) 0) (= (* .cse20 4) |c_ULTIMATE.start_main_~d~0#1|) (<= (* 2 .cse20) |c_ULTIMATE.start_main_~r~0#1|) (= 0 |c_ULTIMATE.start_main_~q~0#1|) (= |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1|) (or (and (or (not (= .cse13 .cse1)) .cse0 .cse3) (or (not (= .cse4 .cse13)) .cse5)) (and (not .cse18) .cse6) (let ((.cse33 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse26 (< .cse17 0)) (.cse35 (+ .cse33 |c_ULTIMATE.start_main_~B~0#1|)) (.cse27 (div .cse13 2))) (let ((.cse28 (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (.cse25 (= .cse27 .cse33)) (.cse22 (= (mod .cse17 2) 0)) (.cse21 (= .cse27 .cse35)) (.cse24 (not .cse26))) (and (or (let ((.cse23 (not (<= (+ .cse27 .cse7) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse21 .cse22 .cse23 .cse24) (or .cse25 .cse23 .cse26))) .cse28 .cse9) (or (not .cse28) .cse9 (let ((.cse31 (= (mod .cse13 2) 0)) (.cse36 (< .cse13 0))) (let ((.cse34 (+ .cse27 1)) (.cse32 (not .cse36)) (.cse29 (and .cse36 (not .cse31))) (.cse30 (not (<= (+ .cse27 .cse7 .cse13) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse29 .cse25 .cse30) (or .cse31 .cse32 (= .cse33 .cse34))) .cse26) (or .cse22 (and (or (= .cse34 .cse35) .cse32) (or .cse21 .cse29 .cse30)) .cse24)))))))))) .cse18))) is different from false [2022-11-25 23:55:52,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:54,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:56,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:55:58,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:00,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:01,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:04,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:06,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:08,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:11,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:13,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:15,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:17,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:18,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:21,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:23,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:26,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:27,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:30,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:31,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:33,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:35,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:39,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:40,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:42,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:45,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:47,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:49,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:51,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:53,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:56:55,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:57:50,780 WARN L233 SmtUtils]: Spent 41.29s on a formula simplification. DAG size of input: 183 DAG size of output: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:57:52,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:58:00,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:58:49,494 WARN L233 SmtUtils]: Spent 23.47s on a formula simplification. DAG size of input: 139 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:55,606 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse17 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse35 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|))) (.cse0 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse36 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse1 (+ .cse4 1)) (.cse3 (not .cse36)) (.cse5 (and .cse36 (not .cse0))) (.cse18 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse6 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse9 (not .cse35)) (.cse13 (* .cse17 |c_ULTIMATE.start_main_~B~0#1|))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2)) .cse3) (or (not (= .cse4 .cse2)) .cse5)) (not .cse6) (let ((.cse16 (+ .cse17 1))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse16 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse8 (div .cse2 2))) (let ((.cse10 (= .cse15 .cse8)) (.cse11 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= (mod .cse16 2) 0))) (and (or (not (<= (+ .cse7 .cse8) |c_ULTIMATE.start_main_~A~0#1|)) .cse9 .cse10 .cse11 .cse12) (or (let ((.cse14 (< .cse2 0))) (and (or (not (<= (+ .cse7 .cse8 |c_ULTIMATE.start_main_~B~0#1| .cse13) |c_ULTIMATE.start_main_~A~0#1|)) .cse10 (and .cse14 (not (= (mod .cse2 2) 0)))) (or (not .cse14) (= .cse15 (+ .cse8 1))))) (not .cse11) .cse9 .cse12))))) .cse18)) (or (and (or (not (= .cse13 .cse1)) .cse0 .cse3) (or (not (= .cse4 .cse13)) .cse5)) (and (not .cse18) .cse6) (let ((.cse31 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse24 (< .cse17 0)) (.cse33 (+ .cse31 |c_ULTIMATE.start_main_~B~0#1|)) (.cse25 (div .cse13 2))) (let ((.cse26 (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (.cse23 (= .cse25 .cse31)) (.cse20 (= (mod .cse17 2) 0)) (.cse19 (= .cse25 .cse33)) (.cse22 (not .cse24))) (and (or (let ((.cse21 (not (<= (+ .cse25 .cse7) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse19 .cse20 .cse21 .cse22) (or .cse23 .cse21 .cse24))) .cse26 .cse9) (or (not .cse26) .cse9 (let ((.cse29 (= (mod .cse13 2) 0)) (.cse34 (< .cse13 0))) (let ((.cse32 (+ .cse25 1)) (.cse30 (not .cse34)) (.cse27 (and .cse34 (not .cse29))) (.cse28 (not (<= (+ .cse25 .cse7 .cse13) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse27 .cse23 .cse28) (or .cse29 .cse30 (= .cse31 .cse32))) .cse24) (or .cse20 (and (or (= .cse32 .cse33) .cse30) (or .cse19 .cse27 .cse28)) .cse22)))))))))) .cse35 (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|))))) is different from false [2022-11-25 23:58:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:55,616 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2022-11-25 23:58:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 23:58:55,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 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 [2022-11-25 23:58:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:55,618 INFO L225 Difference]: With dead ends: 130 [2022-11-25 23:58:55,618 INFO L226 Difference]: Without dead ends: 128 [2022-11-25 23:58:55,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 206 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 322.8s TimeCoverageRelationStatistics Valid=405, Invalid=2030, Unknown=27, NotChecked=294, Total=2756 [2022-11-25 23:58:55,620 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 71 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 100.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:55,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 107 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 511 Invalid, 25 Unknown, 28 Unchecked, 100.8s Time] [2022-11-25 23:58:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-25 23:58:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2022-11-25 23:58:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-25 23:58:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2022-11-25 23:58:55,672 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 81 [2022-11-25 23:58:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:55,673 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2022-11-25 23:58:55,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-25 23:58:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2022-11-25 23:58:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-25 23:58:55,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:55,675 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:55,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:55,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:58:55,879 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:58:55,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash 20862120, now seen corresponding path program 2 times [2022-11-25 23:58:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:55,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711769937] [2022-11-25 23:58:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:55,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:55,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:58:55,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215023680] [2022-11-25 23:58:55,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:58:55,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:55,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:55,891 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:55,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:58:55,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:58:55,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:58:55,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:58:55,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 113 proven. 39 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-11-25 23:58:56,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-11-25 23:58:56,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:56,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711769937] [2022-11-25 23:58:56,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:58:56,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215023680] [2022-11-25 23:58:56,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215023680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:58:56,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479146583] [2022-11-25 23:58:56,401 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-25 23:58:56,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:58:56,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:58:56,402 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:58:56,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:58:59,116 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-25 23:58:59,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:59:00,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5487#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:59:00,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:59:00,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:59:00,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-11-25 23:59:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094675603] [2022-11-25 23:59:00,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:59:00,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:59:00,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:59:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:59:00,373 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-25 23:59:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:00,812 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2022-11-25 23:59:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:59:00,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 92 [2022-11-25 23:59:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:00,813 INFO L225 Difference]: With dead ends: 114 [2022-11-25 23:59:00,813 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 23:59:00,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 243 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:59:00,815 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:00,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:59:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 23:59:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 23:59:00,816 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) [2022-11-25 23:59:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 23:59:00,817 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2022-11-25 23:59:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:00,817 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 23:59:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-25 23:59:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 23:59:00,818 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 23:59:00,821 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 23:59:00,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:01,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:01,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-25 23:59:08,762 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 22 61) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-25 23:59:08,763 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-25 23:59:08,763 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse6 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 .cse0) |ULTIMATE.start_main_~r~0#1|) .cse1 (= (* .cse0 4) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3)) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse4 2)) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= 100 (select .cse4 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| (ite (and (<= |ULTIMATE.start_main_~A~0#1| 10) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0)) .cse1 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse2 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) .cse3 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse6 (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and .cse1 .cse2 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse3 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-25 23:59:08,763 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-25 23:59:08,764 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-25 23:59:08,764 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-25 23:59:08,764 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2022-11-25 23:59:08,764 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-25 23:59:08,764 INFO L895 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)) [2022-11-25 23:59:08,764 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2022-11-25 23:59:08,765 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse6 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse3 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse0 2)) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| (ite (and (<= |ULTIMATE.start_main_~A~0#1| 10) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse1 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) .cse2 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse3 0) 48) (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse4 (= (select .cse3 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) .cse6 (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2)) (and .cse6 .cse1 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-25 23:59:08,765 INFO L902 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-11-25 23:59:08,765 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse6 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 .cse0) |ULTIMATE.start_main_~r~0#1|) .cse1 (= (* .cse0 4) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3)) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse4 2)) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= 100 (select .cse4 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| (ite (and (<= |ULTIMATE.start_main_~A~0#1| 10) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0)) .cse1 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse2 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) .cse3 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse6 (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and .cse1 .cse2 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse3 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-25 23:59:08,765 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse6 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 .cse0) |ULTIMATE.start_main_~r~0#1|) .cse1 (= (* .cse0 4) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3)) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse4 2)) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= 100 (select .cse4 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| (ite (and (<= |ULTIMATE.start_main_~A~0#1| 10) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0)) .cse1 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse2 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) .cse3 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse6 (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and .cse1 .cse2 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse3 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-25 23:59:08,766 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-11-25 23:59:08,766 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-11-25 23:59:08,766 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-11-25 23:59:08,766 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-11-25 23:59:08,766 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-11-25 23:59:08,766 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-11-25 23:59:08,769 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:08,771 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:59:08,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:59:08 BoogieIcfgContainer [2022-11-25 23:59:08,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:59:08,793 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:59:08,793 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:59:08,793 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:59:08,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:48:08" (3/4) ... [2022-11-25 23:59:08,796 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 23:59:08,800 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-25 23:59:08,804 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-11-25 23:59:08,804 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-25 23:59:08,805 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 23:59:08,805 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 23:59:08,805 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 23:59:08,828 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && \old(cond) == (if A <= 10 && 0 <= A then 1 else 0)) && \old(cond) == cond) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && d == p) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B * (p / 2) + B * q + r == d / 2 + A) && B == 1) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || (((((4 <= p && 2 * (B * (-(-p / -2) / -2)) <= r) && q == 0) && B * (-(-p / -2) / -2) * 4 == d) && A == r) && d == p)) || (((((q == 0 && A == r) && 1 <= r) && d == p) && B == 1) && 2 == d) [2022-11-25 23:59:08,836 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-25 23:59:08,836 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:59:08,837 INFO L158 Benchmark]: Toolchain (without parser) took 661701.75ms. Allocated memory was 134.2MB in the beginning and 448.8MB in the end (delta: 314.6MB). Free memory was 72.7MB in the beginning and 274.0MB in the end (delta: -201.3MB). Peak memory consumption was 115.1MB. Max. memory is 16.1GB. [2022-11-25 23:59:08,837 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 134.2MB. Free memory is still 107.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:59:08,838 INFO L158 Benchmark]: CACSL2BoogieTranslator took 368.12ms. Allocated memory was 134.2MB in the beginning and 178.3MB in the end (delta: 44.0MB). Free memory was 72.4MB in the beginning and 149.4MB in the end (delta: -77.0MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. [2022-11-25 23:59:08,838 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.47ms. Allocated memory is still 178.3MB. Free memory was 149.4MB in the beginning and 148.5MB in the end (delta: 895.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:59:08,838 INFO L158 Benchmark]: Boogie Preprocessor took 54.00ms. Allocated memory is still 178.3MB. Free memory was 148.5MB in the beginning and 146.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:59:08,839 INFO L158 Benchmark]: RCFGBuilder took 409.98ms. Allocated memory is still 178.3MB. Free memory was 146.6MB in the beginning and 132.9MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-25 23:59:08,839 INFO L158 Benchmark]: TraceAbstraction took 660766.22ms. Allocated memory was 178.3MB in the beginning and 448.8MB in the end (delta: 270.5MB). Free memory was 132.0MB in the beginning and 277.2MB in the end (delta: -145.2MB). Peak memory consumption was 256.5MB. Max. memory is 16.1GB. [2022-11-25 23:59:08,839 INFO L158 Benchmark]: Witness Printer took 44.05ms. Allocated memory is still 448.8MB. Free memory was 277.2MB in the beginning and 274.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:59:08,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 134.2MB. Free memory is still 107.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 368.12ms. Allocated memory was 134.2MB in the beginning and 178.3MB in the end (delta: 44.0MB). Free memory was 72.4MB in the beginning and 149.4MB in the end (delta: -77.0MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.47ms. Allocated memory is still 178.3MB. Free memory was 149.4MB in the beginning and 148.5MB in the end (delta: 895.4kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 54.00ms. Allocated memory is still 178.3MB. Free memory was 148.5MB in the beginning and 146.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 409.98ms. Allocated memory is still 178.3MB. Free memory was 146.6MB in the beginning and 132.9MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 660766.22ms. Allocated memory was 178.3MB in the beginning and 448.8MB in the end (delta: 270.5MB). Free memory was 132.0MB in the beginning and 277.2MB in the end (delta: -145.2MB). Peak memory consumption was 256.5MB. Max. memory is 16.1GB. * Witness Printer took 44.05ms. Allocated memory is still 448.8MB. Free memory was 277.2MB in the beginning and 274.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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: 660.7s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 320.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 mSolverCounterUnknown, 265 SdHoareTripleChecker+Valid, 115.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 215 mSDsluCounter, 704 SdHoareTripleChecker+Invalid, 114.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 28 IncrementalHoareTripleChecker+Unchecked, 471 mSDsCounter, 355 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2286 IncrementalHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 355 mSolverCounterUnsat, 233 mSDtfsCounter, 2286 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1468 GetRequests, 1193 SyntacticMatches, 38 SemanticMatches, 237 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 339.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=10, InterpolantAutomatonStates: 117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 50 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 66 PreInvPairs, 122 NumberOfFragments, 921 HoareAnnotationTreeSize, 66 FomulaSimplifications, 2595 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 23270 FormulaSimplificationTreeSizeReductionInter, 7.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 287.4s InterpolantComputationTime, 541 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 973 ConstructedInterpolants, 6 QuantifiedInterpolants, 12444 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1307 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 3152/3559 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: OVERALL_TIME: 0.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 7, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME: 0.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 65, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((1 <= p && A == q + r) && d == p) && B == 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && \old(cond) == (if A <= 10 && 0 <= A then 1 else 0)) && \old(cond) == cond) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && d == p) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B * (p / 2) + B * q + r == d / 2 + A) && B == 1) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || (((((4 <= p && 2 * (B * (-(-p / -2) / -2)) <= r) && q == 0) && B * (-(-p / -2) / -2) * 4 == d) && A == r) && d == p)) || (((((q == 0 && A == r) && 1 <= r) && d == p) && B == 1) && 2 == d) RESULT: Ultimate proved your program to be correct! [2022-11-25 23:59:09,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fb02d4-3706-467c-8288-507dfc4abb25/bin/utaipan-ByfvJB40ur/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