./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V --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 7f0424dbafec10d34a77570c428224cb0ba56b8b9f5906b463f2dcbc550354ee --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:57:14,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:57:14,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:57:14,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:57:14,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:57:14,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:57:14,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:57:14,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:57:14,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:57:14,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:57:14,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:57:14,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:57:14,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:57:14,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:57:14,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:57:14,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:57:14,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:57:14,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:57:14,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:57:14,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:57:14,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:57:14,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:57:14,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:57:14,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:57:14,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:57:14,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:57:14,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:57:14,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:57:14,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:57:14,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:57:14,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:57:14,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:57:14,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:57:14,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:57:14,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:57:14,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:57:14,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:57:14,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:57:14,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:57:14,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:57:14,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:57:14,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:57:14,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:57:14,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:57:14,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:57:14,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:57:14,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:57:14,569 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:57:14,570 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:57:14,570 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:57:14,570 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:57:14,571 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:57:14,571 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:57:14,571 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:57:14,571 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:57:14,572 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:57:14,572 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:57:14,572 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:57:14,573 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:57:14,573 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:57:14,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:57:14,574 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:57:14,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:57:14,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:57:14,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:57:14,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:57:14,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:57:14,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:57:14,576 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:57:14,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:57:14,577 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:57:14,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:57:14,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:57:14,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:57:14,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:57:14,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:57:14,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:57:14,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:57:14,580 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:57:14,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:57:14,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:57:14,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:57:14,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:57:14,581 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f0424dbafec10d34a77570c428224cb0ba56b8b9f5906b463f2dcbc550354ee [2021-11-23 01:57:14,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:57:15,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:57:15,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:57:15,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:57:15,017 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:57:15,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2021-11-23 01:57:15,133 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/data/3c4d95d75/2684b1c909a34409b0c48a017bbcda31/FLAG532e1f8f5 [2021-11-23 01:57:15,648 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:57:15,648 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2021-11-23 01:57:15,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/data/3c4d95d75/2684b1c909a34409b0c48a017bbcda31/FLAG532e1f8f5 [2021-11-23 01:57:16,006 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/data/3c4d95d75/2684b1c909a34409b0c48a017bbcda31 [2021-11-23 01:57:16,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:57:16,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:57:16,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:57:16,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:57:16,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:57:16,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b858942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16, skipping insertion in model container [2021-11-23 01:57:16,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:57:16,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:57:16,294 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2021-11-23 01:57:16,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:57:16,364 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:57:16,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2021-11-23 01:57:16,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:57:16,438 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:57:16,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16 WrapperNode [2021-11-23 01:57:16,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:57:16,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:57:16,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:57:16,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:57:16,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,519 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-11-23 01:57:16,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:57:16,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:57:16,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:57:16,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:57:16,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:57:16,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:57:16,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:57:16,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:57:16,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (1/1) ... [2021-11-23 01:57:16,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:57:16,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:16,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:57:16,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:57:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:57:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:57:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:57:16,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:57:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 01:57:16,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 01:57:16,723 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:57:16,724 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:57:16,879 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:57:16,940 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:57:16,941 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 01:57:16,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:57:16 BoogieIcfgContainer [2021-11-23 01:57:16,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:57:16,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:57:16,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:57:16,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:57:16,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:57:16" (1/3) ... [2021-11-23 01:57:16,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ec75b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:57:16, skipping insertion in model container [2021-11-23 01:57:16,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:16" (2/3) ... [2021-11-23 01:57:16,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ec75b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:57:16, skipping insertion in model container [2021-11-23 01:57:16,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:57:16" (3/3) ... [2021-11-23 01:57:16,955 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2021-11-23 01:57:16,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:57:16,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:57:17,020 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:57:17,041 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 01:57:17,044 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:57:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:57:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 01:57:17,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:17,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 01:57:17,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1275866824, now seen corresponding path program 1 times [2021-11-23 01:57:17,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:17,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298608415] [2021-11-23 01:57:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:17,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:17,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298608415] [2021-11-23 01:57:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298608415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:17,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:17,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:57:17,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052774093] [2021-11-23 01:57:17,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:17,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 01:57:17,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:17,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 01:57:17,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:57:17,415 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:57:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:17,475 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2021-11-23 01:57:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 01:57:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 01:57:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:17,493 INFO L225 Difference]: With dead ends: 29 [2021-11-23 01:57:17,493 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 01:57:17,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:57:17,504 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:17,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:57:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 01:57:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-23 01:57:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:57:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-23 01:57:17,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2021-11-23 01:57:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:17,555 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-23 01:57:17,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:57:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-23 01:57:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 01:57:17,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:17,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:17,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:57:17,559 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:17,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1770432352, now seen corresponding path program 1 times [2021-11-23 01:57:17,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:17,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899061867] [2021-11-23 01:57:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:17,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:17,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:17,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899061867] [2021-11-23 01:57:17,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899061867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:17,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:17,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:17,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032946385] [2021-11-23 01:57:17,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:17,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:57:17,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:57:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:57:17,738 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:57:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:17,775 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-11-23 01:57:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:57:17,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 01:57:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:17,777 INFO L225 Difference]: With dead ends: 23 [2021-11-23 01:57:17,777 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 01:57:17,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:57:17,780 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:17,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:57:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 01:57:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 01:57:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:57:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-23 01:57:17,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2021-11-23 01:57:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:17,787 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-23 01:57:17,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:57:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-23 01:57:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 01:57:17,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:17,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:17,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:57:17,805 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1768644892, now seen corresponding path program 1 times [2021-11-23 01:57:17,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:17,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512222916] [2021-11-23 01:57:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:17,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:17,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:57:17,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168902284] [2021-11-23 01:57:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:17,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:17,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:17,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:17,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:57:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:17,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 01:57:17,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:18,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:57:18,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512222916] [2021-11-23 01:57:18,208 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:57:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168902284] [2021-11-23 01:57:18,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168902284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:18,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:18,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:57:18,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959794880] [2021-11-23 01:57:18,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:18,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:57:18,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:57:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:18,213 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:57:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:18,285 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-11-23 01:57:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:57:18,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 01:57:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:18,288 INFO L225 Difference]: With dead ends: 25 [2021-11-23 01:57:18,288 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 01:57:18,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:57:18,291 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:18,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:57:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 01:57:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-11-23 01:57:18,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:57:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-23 01:57:18,310 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2021-11-23 01:57:18,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:18,311 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-23 01:57:18,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:57:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-23 01:57:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 01:57:18,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:18,314 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:18,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:18,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:18,541 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash 167458353, now seen corresponding path program 1 times [2021-11-23 01:57:18,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:18,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524286895] [2021-11-23 01:57:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:18,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:18,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:57:18,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45865697] [2021-11-23 01:57:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:18,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:18,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:18,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:18,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:57:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:18,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 01:57:18,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:18,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:19,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524286895] [2021-11-23 01:57:19,296 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:57:19,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45865697] [2021-11-23 01:57:19,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45865697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:19,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1046041645] [2021-11-23 01:57:19,328 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 01:57:19,328 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:19,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:19,339 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:19,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:19,777 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2021-11-23 01:57:19,802 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:20,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1046041645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:20,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:57:20,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 18 [2021-11-23 01:57:20,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620983955] [2021-11-23 01:57:20,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:20,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:57:20,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:57:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-23 01:57:20,939 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:57:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:21,102 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-23 01:57:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:57:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-23 01:57:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:21,104 INFO L225 Difference]: With dead ends: 29 [2021-11-23 01:57:21,104 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 01:57:21,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-23 01:57:21,107 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:21,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 01:57:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 01:57:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:57:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-23 01:57:21,116 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-23 01:57:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:21,117 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-23 01:57:21,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:57:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-23 01:57:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 01:57:21,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:21,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:21,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:21,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:21,345 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:21,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1288276564, now seen corresponding path program 1 times [2021-11-23 01:57:21,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:21,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724242387] [2021-11-23 01:57:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:21,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:21,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:57:21,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604992081] [2021-11-23 01:57:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:21,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:21,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:21,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:21,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:57:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:21,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 01:57:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:21,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:21,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:21,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724242387] [2021-11-23 01:57:21,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:57:21,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604992081] [2021-11-23 01:57:21,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604992081] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:21,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604952936] [2021-11-23 01:57:21,575 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 01:57:21,576 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:21,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:21,576 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:21,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:24,169 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2021-11-23 01:57:24,463 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:25,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '472#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 01:57:25,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:57:25,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:57:25,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-11-23 01:57:25,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097610076] [2021-11-23 01:57:25,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:57:25,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:57:25,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:25,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:57:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-23 01:57:25,305 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 01:57:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:25,355 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-23 01:57:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:57:25,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-23 01:57:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:25,358 INFO L225 Difference]: With dead ends: 31 [2021-11-23 01:57:25,359 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 01:57:25,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-23 01:57:25,360 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:25,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:57:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 01:57:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 01:57:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:57:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-23 01:57:25,376 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2021-11-23 01:57:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:25,377 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-23 01:57:25,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 01:57:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-23 01:57:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 01:57:25,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:25,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:25,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:25,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:25,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1286489104, now seen corresponding path program 1 times [2021-11-23 01:57:25,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:25,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519082996] [2021-11-23 01:57:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:25,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:25,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:57:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10851888] [2021-11-23 01:57:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:25,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:25,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:25,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:25,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:57:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 01:57:27,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:29,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:30,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:30,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519082996] [2021-11-23 01:57:30,465 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:57:30,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10851888] [2021-11-23 01:57:30,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10851888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:30,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238581218] [2021-11-23 01:57:30,469 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 01:57:30,469 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:30,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:30,470 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:30,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:32,479 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2021-11-23 01:57:32,614 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:33,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '653#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (< ~counter~0 3) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 01:57:33,115 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:57:33,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:57:33,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-23 01:57:33,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060056555] [2021-11-23 01:57:33,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:57:33,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 01:57:33,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:33,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 01:57:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-23 01:57:33,118 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:57:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:33,844 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-23 01:57:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:57:33,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-11-23 01:57:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:33,846 INFO L225 Difference]: With dead ends: 33 [2021-11-23 01:57:33,846 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 01:57:33,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-23 01:57:33,848 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:33,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 58 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 01:57:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 01:57:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-11-23 01:57:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:57:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-23 01:57:33,858 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2021-11-23 01:57:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:33,858 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-23 01:57:33,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:57:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-23 01:57:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 01:57:33,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:33,860 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:33,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 01:57:34,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 01:57:34,067 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1954110013, now seen corresponding path program 1 times [2021-11-23 01:57:34,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:34,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24027327] [2021-11-23 01:57:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:34,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:34,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:57:34,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428599323] [2021-11-23 01:57:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:34,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:34,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:34,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:57:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 01:57:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:57:34,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:57:34,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24027327] [2021-11-23 01:57:34,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:57:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428599323] [2021-11-23 01:57:34,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428599323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687704153] [2021-11-23 01:57:34,539 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 01:57:34,539 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:34,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:34,540 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:34,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:36,367 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2021-11-23 01:57:36,945 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:39,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '878#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (< ~counter~0 3) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 01:57:39,869 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:57:39,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:57:39,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-23 01:57:39,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106959952] [2021-11-23 01:57:39,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:57:39,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 01:57:39,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:39,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 01:57:39,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=274, Unknown=1, NotChecked=0, Total=342 [2021-11-23 01:57:39,872 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:57:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:40,080 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-23 01:57:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:57:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-23 01:57:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:40,083 INFO L225 Difference]: With dead ends: 34 [2021-11-23 01:57:40,083 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 01:57:40,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=82, Invalid=337, Unknown=1, NotChecked=0, Total=420 [2021-11-23 01:57:40,085 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:40,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 01:57:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 01:57:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:57:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-11-23 01:57:40,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2021-11-23 01:57:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:40,105 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-11-23 01:57:40,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:57:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-11-23 01:57:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 01:57:40,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:40,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 01:57:40,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:40,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 01:57:40,325 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1992017592, now seen corresponding path program 2 times [2021-11-23 01:57:40,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:40,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064640632] [2021-11-23 01:57:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:40,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:40,336 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:57:40,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102394104] [2021-11-23 01:57:40,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:57:40,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:40,338 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:40,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 01:57:40,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 01:57:40,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-23 01:57:40,421 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 01:57:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 01:57:40,535 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 01:57:40,536 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 01:57:40,537 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 01:57:40,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:40,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:40,744 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:40,748 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 01:57:40,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:57:40 BoogieIcfgContainer [2021-11-23 01:57:40,805 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 01:57:40,808 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 01:57:40,808 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 01:57:40,808 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 01:57:40,809 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:57:16" (3/4) ... [2021-11-23 01:57:40,811 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 01:57:40,875 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 01:57:40,875 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 01:57:40,876 INFO L158 Benchmark]: Toolchain (without parser) took 24864.85ms. Allocated memory was 94.4MB in the beginning and 172.0MB in the end (delta: 77.6MB). Free memory was 52.7MB in the beginning and 108.4MB in the end (delta: -55.7MB). Peak memory consumption was 20.7MB. Max. memory is 16.1GB. [2021-11-23 01:57:40,877 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 01:57:40,877 INFO L158 Benchmark]: CACSL2BoogieTranslator took 418.81ms. Allocated memory is still 94.4MB. Free memory was 52.5MB in the beginning and 68.4MB in the end (delta: -15.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 01:57:40,878 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.02ms. Allocated memory is still 94.4MB. Free memory was 68.4MB in the beginning and 66.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 01:57:40,878 INFO L158 Benchmark]: Boogie Preprocessor took 26.19ms. Allocated memory is still 94.4MB. Free memory was 66.9MB in the beginning and 65.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 01:57:40,879 INFO L158 Benchmark]: RCFGBuilder took 392.23ms. Allocated memory is still 94.4MB. Free memory was 65.6MB in the beginning and 53.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 01:57:40,879 INFO L158 Benchmark]: TraceAbstraction took 23858.39ms. Allocated memory was 94.4MB in the beginning and 172.0MB in the end (delta: 77.6MB). Free memory was 52.3MB in the beginning and 111.6MB in the end (delta: -59.3MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. [2021-11-23 01:57:40,880 INFO L158 Benchmark]: Witness Printer took 67.49ms. Allocated memory is still 172.0MB. Free memory was 111.6MB in the beginning and 108.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 01:57:40,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 418.81ms. Allocated memory is still 94.4MB. Free memory was 52.5MB in the beginning and 68.4MB in the end (delta: -15.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.02ms. Allocated memory is still 94.4MB. Free memory was 68.4MB in the beginning and 66.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.19ms. Allocated memory is still 94.4MB. Free memory was 66.9MB in the beginning and 65.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 392.23ms. Allocated memory is still 94.4MB. Free memory was 65.6MB in the beginning and 53.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 23858.39ms. Allocated memory was 94.4MB in the beginning and 172.0MB in the end (delta: 77.6MB). Free memory was 52.3MB in the beginning and 111.6MB in the end (delta: -59.3MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. * Witness Printer took 67.49ms. Allocated memory is still 172.0MB. Free memory was 111.6MB in the beginning and 108.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=4, b=8, counter=0, p=1, q=0, x=4, y=8] [L33] EXPR counter++ VAL [a=4, b=8, counter=1, counter++=0, p=1, q=0, x=4, y=8] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=4, b=8, counter=1, p=1, q=0, x=4, y=8] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=2, b=4, counter=1, p=4, q=0, x=4, y=8] [L33] EXPR counter++ VAL [a=2, b=4, counter=2, counter++=1, p=4, q=0, x=4, y=8] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=2, b=4, counter=2, p=4, q=0, x=4, y=8] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=1, b=2, counter=2, p=16, q=0, x=4, y=8] [L33] EXPR counter++ VAL [a=1, b=2, counter=3, counter++=2, p=16, q=0, x=4, y=8] [L33] COND FALSE !(counter++<2) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=3] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.7s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 54 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46 mSDsluCounter, 268 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 201 mSDsCounter, 26 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 264 IncrementalHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26 mSolverCounterUnsat, 82 mSDtfsCounter, 264 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 120 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=7, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 933 SizeOfPredicates, 28 NumberOfNonLiveVariables, 361 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 33/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 11, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 17, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 66, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 01:57:40,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e0e33d8-c22c-4066-a768-47ba3fd86989/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE