./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh --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 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 --- 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-2329fc7 [2022-12-14 05:34:27,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:34:27,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:34:27,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:34:27,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:34:27,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:34:27,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:34:27,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:34:27,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:34:27,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:34:27,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:34:27,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:34:27,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:34:27,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:34:27,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:34:27,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:34:27,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:34:27,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:34:27,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:34:27,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:34:27,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:34:27,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:34:27,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:34:27,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:34:27,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:34:27,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:34:27,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:34:27,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:34:27,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:34:27,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:34:27,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:34:27,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:34:27,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:34:27,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:34:27,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:34:27,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:34:27,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:34:27,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:34:27,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:34:27,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:34:27,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:34:27,438 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:34:27,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:34:27,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:34:27,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:34:27,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:34:27,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:34:27,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:34:27,460 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:34:27,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:34:27,460 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:34:27,460 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:34:27,461 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:34:27,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:34:27,466 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:34:27,467 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:34:27,467 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:34:27,467 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:34:27,467 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:34:27,467 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:34:27,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:34:27,468 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:34:27,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:34:27,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:34:27,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:34:27,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:34:27,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:34:27,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:34:27,469 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:34:27,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:34:27,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:34:27,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:34:27,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:34:27,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:34:27,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:34:27,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:34:27,471 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:34:27,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:34:27,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:34:27,471 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:34:27,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:34:27,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:34:27,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:34:27,472 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_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 [2022-12-14 05:34:27,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:34:27,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:34:27,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:34:27,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:34:27,662 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:34:27,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2022-12-14 05:34:30,245 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:34:30,388 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:34:30,389 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2022-12-14 05:34:30,394 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/data/2921bfe45/2d2b8265b42a41568f688165c54dcf75/FLAG092be01ee [2022-12-14 05:34:30,405 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/data/2921bfe45/2d2b8265b42a41568f688165c54dcf75 [2022-12-14 05:34:30,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:34:30,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:34:30,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:34:30,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:34:30,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:34:30,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a1b611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30, skipping insertion in model container [2022-12-14 05:34:30,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:34:30,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:34:30,533 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_75f38a21-b5df-4912-8221-b9fce81fcce2/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2022-12-14 05:34:30,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:34:30,553 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:34:30,562 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_75f38a21-b5df-4912-8221-b9fce81fcce2/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2022-12-14 05:34:30,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:34:30,576 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:34:30,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30 WrapperNode [2022-12-14 05:34:30,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:34:30,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:34:30,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:34:30,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:34:30,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,601 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-12-14 05:34:30,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:34:30,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:34:30,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:34:30,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:34:30,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,619 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:34:30,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:34:30,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:34:30,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:34:30,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (1/1) ... [2022-12-14 05:34:30,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:34:30,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:30,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:34:30,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:34:30,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:34:30,687 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 05:34:30,687 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 05:34:30,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:34:30,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:34:30,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:34:30,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 05:34:30,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 05:34:30,742 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:34:30,744 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:34:30,847 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:34:30,869 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:34:30,869 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 05:34:30,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:34:30 BoogieIcfgContainer [2022-12-14 05:34:30,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:34:30,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:34:30,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:34:30,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:34:30,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:34:30" (1/3) ... [2022-12-14 05:34:30,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67096b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:34:30, skipping insertion in model container [2022-12-14 05:34:30,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:30" (2/3) ... [2022-12-14 05:34:30,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67096b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:34:30, skipping insertion in model container [2022-12-14 05:34:30,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:34:30" (3/3) ... [2022-12-14 05:34:30,878 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.c [2022-12-14 05:34:30,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:34:30,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:34:30,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:34:30,932 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;@44b74e7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:34:30,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:34:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 05:34:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:34:30,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:30,941 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:30,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:30,945 INFO L85 PathProgramCache]: Analyzing trace with hash 763440750, now seen corresponding path program 1 times [2022-12-14 05:34:30,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:30,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502958711] [2022-12-14 05:34:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:30,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:31,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:31,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502958711] [2022-12-14 05:34:31,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502958711] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:31,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:31,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:34:31,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093362615] [2022-12-14 05:34:31,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:31,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:34:31,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:34:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:34:31,203 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:34:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:31,278 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2022-12-14 05:34:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:34:31,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-12-14 05:34:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:31,286 INFO L225 Difference]: With dead ends: 58 [2022-12-14 05:34:31,286 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 05:34:31,288 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 [2022-12-14 05:34:31,291 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:31,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 108 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:34:31,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 05:34:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-12-14 05:34:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 05:34:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-12-14 05:34:31,322 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2022-12-14 05:34:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:31,323 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-12-14 05:34:31,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:34:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-12-14 05:34:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 05:34:31,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:31,324 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:31,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:34:31,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:31,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1804559349, now seen corresponding path program 1 times [2022-12-14 05:34:31,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:31,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688042778] [2022-12-14 05:34:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:31,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:31,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:31,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688042778] [2022-12-14 05:34:31,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688042778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:31,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:31,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:34:31,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145169266] [2022-12-14 05:34:31,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:31,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:34:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:34:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:34:31,437 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 05:34:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:31,494 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-12-14 05:34:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:34:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2022-12-14 05:34:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:31,496 INFO L225 Difference]: With dead ends: 41 [2022-12-14 05:34:31,496 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 05:34:31,496 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 [2022-12-14 05:34:31,497 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:31,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 100 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:34:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 05:34:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-12-14 05:34:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 05:34:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-12-14 05:34:31,504 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-12-14 05:34:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:31,504 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-12-14 05:34:31,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 05:34:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-12-14 05:34:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 05:34:31,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:31,505 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:31,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:34:31,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:31,506 INFO L85 PathProgramCache]: Analyzing trace with hash 496345742, now seen corresponding path program 1 times [2022-12-14 05:34:31,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:31,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131541453] [2022-12-14 05:34:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:31,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:31,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:34:31,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072866330] [2022-12-14 05:34:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:31,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:31,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:31,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:31,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:34:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:34:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:34:31,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:34:31,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131541453] [2022-12-14 05:34:31,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:34:31,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072866330] [2022-12-14 05:34:31,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072866330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:31,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693724318] [2022-12-14 05:34:31,820 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:34:31,820 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:31,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:31,827 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:31,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:32,181 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-12-14 05:34:32,189 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 05:34:32,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:32,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1693724318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:32,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:34:32,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 7] total 21 [2022-12-14 05:34:32,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418859414] [2022-12-14 05:34:32,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:32,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 05:34:32,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:32,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 05:34:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:34:32,690 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 11 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 05:34:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:32,973 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-12-14 05:34:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:34:32,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 27 [2022-12-14 05:34:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:32,975 INFO L225 Difference]: With dead ends: 68 [2022-12-14 05:34:32,975 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 05:34:32,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:34:32,977 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:32,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:34:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 05:34:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 05:34:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 05:34:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-12-14 05:34:32,997 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 27 [2022-12-14 05:34:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:32,998 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-12-14 05:34:32,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 05:34:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-12-14 05:34:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 05:34:32,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:32,999 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:33,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:34:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:33,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash -202147981, now seen corresponding path program 1 times [2022-12-14 05:34:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:33,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706291533] [2022-12-14 05:34:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:33,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:34:33,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048825439] [2022-12-14 05:34:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:33,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:33,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:33,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:33,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:34:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 05:34:33,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 05:34:33,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:34:33,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:33,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706291533] [2022-12-14 05:34:33,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:34:33,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048825439] [2022-12-14 05:34:33,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048825439] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:33,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1348890323] [2022-12-14 05:34:33,541 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:34:33,541 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:33,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:33,542 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:33,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:35,280 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 05:34:35,283 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 05:34:35,284 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:35,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '917#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:35,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:35,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:34:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2022-12-14 05:34:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188958843] [2022-12-14 05:34:35,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:35,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 05:34:35,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 05:34:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-12-14 05:34:35,722 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-12-14 05:34:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:35,993 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2022-12-14 05:34:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:34:35,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 44 [2022-12-14 05:34:35,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:35,996 INFO L225 Difference]: With dead ends: 82 [2022-12-14 05:34:35,996 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 05:34:35,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-12-14 05:34:35,998 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:35,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 88 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:34:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 05:34:36,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-12-14 05:34:36,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 05:34:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2022-12-14 05:34:36,023 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 44 [2022-12-14 05:34:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:36,023 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2022-12-14 05:34:36,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-12-14 05:34:36,023 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2022-12-14 05:34:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 05:34:36,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:36,024 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:36,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:34:36,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 05:34:36,225 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash -567180131, now seen corresponding path program 1 times [2022-12-14 05:34:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:36,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341481338] [2022-12-14 05:34:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:36,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:36,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:34:36,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198409666] [2022-12-14 05:34:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:36,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:36,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:36,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:34:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:36,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 05:34:36,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 05:34:36,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 05:34:36,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341481338] [2022-12-14 05:34:36,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:34:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198409666] [2022-12-14 05:34:36,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198409666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [80308289] [2022-12-14 05:34:36,767 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 05:34:36,767 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:36,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:36,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:36,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:38,171 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 05:34:38,197 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 05:34:38,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:38,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1479#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:38,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:38,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:34:38,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2022-12-14 05:34:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721654101] [2022-12-14 05:34:38,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:38,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 05:34:38,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 05:34:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-12-14 05:34:38,903 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-14 05:34:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:39,155 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-12-14 05:34:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:34:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 51 [2022-12-14 05:34:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:39,157 INFO L225 Difference]: With dead ends: 85 [2022-12-14 05:34:39,157 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 05:34:39,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-12-14 05:34:39,158 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:39,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 124 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:34:39,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 05:34:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-12-14 05:34:39,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 05:34:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-12-14 05:34:39,176 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 51 [2022-12-14 05:34:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:39,177 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-12-14 05:34:39,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-14 05:34:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-12-14 05:34:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 05:34:39,178 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:39,178 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:39,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:34:39,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:39,379 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:39,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:39,379 INFO L85 PathProgramCache]: Analyzing trace with hash 166119996, now seen corresponding path program 1 times [2022-12-14 05:34:39,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:39,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333432229] [2022-12-14 05:34:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:39,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:39,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:34:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028608237] [2022-12-14 05:34:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:39,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:39,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:39,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:39,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:34:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 05:34:39,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 05:34:39,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:13,745 WARN L233 SmtUtils]: Spent 17.15s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:35:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 05:35:53,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:53,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333432229] [2022-12-14 05:35:53,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:35:53,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028608237] [2022-12-14 05:35:53,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028608237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:53,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [223052858] [2022-12-14 05:35:53,130 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 05:35:53,130 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:53,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:53,131 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:53,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:54,722 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2022-12-14 05:35:54,738 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 05:35:54,739 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:57,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2134#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:57,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:57,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:35:57,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-12-14 05:35:57,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514572272] [2022-12-14 05:35:57,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:57,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 05:35:57,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:57,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 05:35:57,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-12-14 05:35:57,128 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 05:36:15,406 WARN L233 SmtUtils]: Spent 13.34s on a formula simplification. DAG size of input: 65 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:36:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:17,267 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2022-12-14 05:36:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 05:36:17,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2022-12-14 05:36:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:17,269 INFO L225 Difference]: With dead ends: 100 [2022-12-14 05:36:17,269 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 05:36:17,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 05:36:17,271 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:17,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 125 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 05:36:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 05:36:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-12-14 05:36:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 05:36:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2022-12-14 05:36:17,298 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 63 [2022-12-14 05:36:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:17,298 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2022-12-14 05:36:17,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 05:36:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2022-12-14 05:36:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 05:36:17,304 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:17,304 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:17,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:36:17,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 05:36:17,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:36:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:17,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1987386298, now seen corresponding path program 1 times [2022-12-14 05:36:17,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:36:17,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397201456] [2022-12-14 05:36:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:17,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:36:17,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:36:17,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523260222] [2022-12-14 05:36:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:17,546 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:17,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:36:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:36:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:36:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-12-14 05:36:17,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:18,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:36:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397201456] [2022-12-14 05:36:18,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:36:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523260222] [2022-12-14 05:36:18,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523260222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:36:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [584156444] [2022-12-14 05:36:18,176 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 05:36:18,177 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:36:18,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:36:18,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:36:18,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:36:19,714 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 05:36:19,717 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 05:36:19,717 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:36:20,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2733#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:36:20,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:36:20,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:36:20,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-12-14 05:36:20,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071167902] [2022-12-14 05:36:20,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 05:36:20,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 05:36:20,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:36:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 05:36:20,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-12-14 05:36:20,180 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 05:36:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:20,716 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-12-14 05:36:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:36:20,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 74 [2022-12-14 05:36:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:20,717 INFO L225 Difference]: With dead ends: 102 [2022-12-14 05:36:20,719 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 05:36:20,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 05:36:20,720 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:20,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 136 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:36:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 05:36:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-12-14 05:36:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 19 states have call successors, (19), 12 states have call predecessors, (19), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 05:36:20,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-12-14 05:36:20,739 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 74 [2022-12-14 05:36:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:20,739 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-12-14 05:36:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 05:36:20,739 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-12-14 05:36:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 05:36:20,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:20,740 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:20,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:36:20,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:20,942 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:36:20,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash 152662242, now seen corresponding path program 2 times [2022-12-14 05:36:20,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:36:20,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544012311] [2022-12-14 05:36:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:20,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:36:20,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:36:20,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321670108] [2022-12-14 05:36:20,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:36:20,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:20,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:20,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:20,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:36:21,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 05:36:21,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:21,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 05:36:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-12-14 05:36:21,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-12-14 05:36:22,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:36:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544012311] [2022-12-14 05:36:22,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:36:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321670108] [2022-12-14 05:36:22,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321670108] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2014790677] [2022-12-14 05:36:22,123 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 05:36:22,123 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:36:22,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:36:22,123 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:36:22,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:36:23,642 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 05:36:23,651 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 05:36:23,651 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:36:24,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3548#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:36:24,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:36:24,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:36:24,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2022-12-14 05:36:24,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236507325] [2022-12-14 05:36:24,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:36:24,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 05:36:24,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:36:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 05:36:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-12-14 05:36:24,740 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-12-14 05:36:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:27,375 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2022-12-14 05:36:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 05:36:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2022-12-14 05:36:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:27,378 INFO L225 Difference]: With dead ends: 108 [2022-12-14 05:36:27,378 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 05:36:27,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 210 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:36:27,378 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:27,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 119 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 05:36:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 05:36:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-12-14 05:36:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-14 05:36:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2022-12-14 05:36:27,407 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 85 [2022-12-14 05:36:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:27,407 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2022-12-14 05:36:27,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-12-14 05:36:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2022-12-14 05:36:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:36:27,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:27,408 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:27,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:36:27,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:27,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:36:27,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:27,610 INFO L85 PathProgramCache]: Analyzing trace with hash 339357760, now seen corresponding path program 3 times [2022-12-14 05:36:27,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:36:27,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837353175] [2022-12-14 05:36:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:27,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:36:27,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:36:27,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806980004] [2022-12-14 05:36:27,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:36:27,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:27,634 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:27,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f38a21-b5df-4912-8221-b9fce81fcce2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:36:27,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:36:27,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:27,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 05:36:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 72 proven. 43 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-12-14 05:36:28,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:53,806 WARN L233 SmtUtils]: Spent 6.89s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)